LEASE

EX-10.48 9 a04-8650_1ex10d48.htm EX-10.48

EXHIBIT 10.48

LEASE

Landlord:		Britannia Pointe Grand Limited Partnership

Tenant:		Exelixis, Inc.

Date:		May 24, 2001

TABLE OF CONTENTS

1. PROPERTY

	1.1 Lease of Building and Property.

	1.2 Landlord’s Reserved Rights.

2. TERM

	2.1 Term.

	2.2 Early Possession.

	2.3 Condition of Premises; Landlord’s Work.

	2.4 Acknowledgement Of Commencement Date.

	2.5 Holding Over.

	2.6 Option To Extend Term.

3. RENTAL

	3.1 Minimum Rental.

	(a) Rental Amounts

	(b) Rental Amounts During First Extended Term

	(c) Rental Amounts During Second Extended Term

	3.2 Late Charge.

4. [Omitted.]

5. [Omitted.]

6. TAXES

	6.1 Personal Property.

	6.2 Real Property.

7. OPERATING EXPENSES

	7.1 Payment of Operating Expenses.

	7.2 Definition Of Operating Expenses.

	7.3 Determination Of Operating Expenses

	7.4 Final Accounting For Lease Year

	7.5 Proration.

8. UTILITIES

	8.1 Payment.

	8.2 Interruption.

9. ALTERATIONS; SIGNS

	9.1 Right To Make Alterations.

	9.2 Title To Alterations.

	9.3 Tenant Fixtures.

	9.4 No Liens.

	9.5 Signs.

10. MAINTENANCE AND REPAIRS

	10.1 Landlord’s Work.

	10.2 Tenant’s Obligation For Maintenance.

	(a) Good Order, Condition And Repair

	(b) Landlord’s Remedy

	(c) Condition Upon Surrender

11. USE OF PROPERTY

	11.1 Permitted Use.

	11.2 [Omitted.]

	11.3 No Nuisance.

	11.4 Compliance With Laws.

	11.5 Liquidation Sales.

	11.6 Environmental Matters.

12. INSURANCE AND INDEMNITY

	12.1 Insurance.

	12.2 Quality Of Policies And Certificates.

	12.3 Workers’ Compensation.

	12.4 Waiver Of Subrogation.

	12.5 Increase In Premiums.

	12.6 Indemnification.

	12.7 Blanket Policy.

13. SUBLEASE AND ASSIGNMENT

	13.1 Assignment And Sublease Of Building.

	13.2 Rights Of Landlord.

14. RIGHT OF ENTRY AND QUIET ENJOYMENT

	14.1 Right Of Entry.

	14.2 Quiet Enjoyment.

15. CASUALTY AND TAKING

	15.1 Damage or Destruction.

	15.2 Condemnation.

	15.3 Reservation Of Compensation.

	15.4 Restoration Of Improvements.

16. DEFAULT

	16.1 Events Of Default.

	(a) [Omitted.]

	(b) Nonpayment.

	(c) Other Obligations.

	(d) General Assignment

	(e) Bankruptcy

	(f) Receivership

	(g) Attachment

	(h) Insolvency

	(i) Cross-Default

	16.2 Remedies Upon Tenant’s Default.

	16.3 Remedies Cumulative.

17. SUBORDINATION, ATTORNMENT AND SALE

	17.1 Subordination To Mortgage.

	17.2 Sale Of Landlord’s Interest.

	17.3 Estoppel Certificates.

	17.4 Subordination to CC&R’s.

	17.5 Mortgagee Protection

18. SECURITY

	18.1 Deposit

19. MISCELLANEOUS

	19.1 Notices.

	19.2 Successors And Assigns.

	19.3 No Waiver.

	19.4 Severability.

	19.5 Litigation Between Parties.

	19.6 Surrender.

	19.7 Interpretation.

	19.8 Entire Agreement.

	19.9 Governing Law.

	19.10 No Partnership.

	19.11 Financial Information.

	19.12 Costs.

	19.13 Time.

	19.14 Rules And Regulations.

	19.15 Brokers.

	19.16 Memorandum Of Lease.

	19.17 Corporate Authority.

	19.18 Execution and Delivery.

	19.19 Survival.

	19.20 Parking

EXHIBITS

EXHIBIT A		Real Property Description

EXHIBIT B		Site Plan

EXHIBIT C		Improvements and Equipment to be Left by Existing Tenant

EXHIBIT D		Acknowledgement of Commencement Date

LEASE

THIS LEASE (“Lease”) is made and entered into as of May 24, 2001, by and between BRITANNIA POINTE GRAND LIMITED PARTNERSHIP, a Delaware limited partnership (“Landlord”), and EXELIXIS, INC., a Delaware corporation (“Tenant”).

THE PARTIES AGREE AS FOLLOWS:

1. 60; PROPERTY

1.1 Lease of Building and Property.

(a) Landlord leases to Tenant and Tenant hires and leases from Landlord, on the terms, covenants and conditions hereinafter set forth, the two-story office and laboratory building which is located on the real property described in Exhibit A attached hereto (the “Property”), is commonly known as 240 East Grand Avenue, South San Francisco, contains approximately 60,967 square feet and is presently occupied by Rigel, Inc. (“Rigel”) as tenant (the “Building”). The location of the Building on the Property is depicted on the site plan attached hereto as Exhibit B (the “Site Plan”). The Property is part of the Britannia Pointe Grand Business Park (the “Center”) at East Grand Avenue and Harbor Way in the City of South San

Francisco, County of San Mateo, State of California. The Building and related improvements presently existing on the Property are sometimes referred to collectively herein as the “Improvements.” The parking areas, driveways, sidewalks, landscaped areas and other portions of the Center that lie outside the exterior walls of the buildings now or hereafter existing from time to time in the Center, as depicted in the Site Plan and as hereafter modified by Landlord from time to time in accordance with the provisions of this Lease, are sometimes referred to herein as the “Common Areas.” Tenant already leases two other buildings in the Center from Landlord pursuant to a Build-to-Suit Lease dated May 12, 1999, as amended by a First Amendment to Build-to-Suit Lease dated March 29, 2000, a Second Amendment to Build-to-Suit Lease dated January 31, 2001 and a Third Amendment to Build-to-Suit Lease dated May 24, 2001 (as amended, the “Existing Lease”); the location of those two buildings (the “Existing Buildings”) is also depicted in the Site Plan.

(b) As an appurtenance to Tenant’s leasing of the Building pursuant to Section 1.1(a), Landlord hereby grants to Tenant, for the benefit of Tenant and its employees, suppliers, shippers, customers and invitees, during the term of this Lease, the non-exclusive right to use, in common with others entitled to such use, (i) those portions of the Common Areas improved from time to time for use as parking areas, driveways, sidewalks, landscaped areas, or for other common purposes, and (ii) all access easements and similar rights and privileges relating to or appurtenant to the Property and created or existing from time to time under any access easement agreements, declarations of covenants, conditions and restrictions, or other written agreements now or hereafter of record with respect to the Property, subject however to any limitations applicable to such rights and privileges under applicable law, under this Lease and/or under the written agreements creating such rights and privileges.

1.2 Landlord’s Reserved Rights. To the extent reasonably necessary to permit Landlord to exercise any rights of Landlord and discharge any obligations of Landlord under this Lease, Landlord shall have, in addition to the right of entry set forth in Section 16.1 hereof, the following rights: (i) to make changes to the Common Areas, including, without limitation, changes in the location, size or shape of any portion of the Common Areas, and to relocate parking spaces on the Property and in the Common Areas (but not materially decrease the number of such parking spaces in areas of the Property generally adjacent to the Building); (ii) to close temporarily any of the Common Areas for maintenance or other reasonable purposes, provided that reasonable parking and reasonable access to the Building remain available; (iii) to construct, alter or add to other buildings and Common Area improvements on the Property (including, but not limited to, construction of site improvements, buildings and Common Area improvements on portions of the Property and/or on adjacent properties owned by Landlord from time to time); (iv) to build in areas adjacent to the Property and to add such areas to the Property or operate such areas, for maintenance, access, parking and other purposes, on an integrated basis with the Property; (v) to use the Common Areas while engaged in making additional improvements, repairs or alterations to the Property or any portion thereof or to any adjacent properties owned by Landlord from time to time; and (vi) to do and perform such other acts with respect to the Common Areas and the Property as may be necessary or appropriate; provided, however, that notwithstanding anything to the contrary in this Section 1.2, Landlord’s exercise of its rights hereunder shall not cause any material diminution of Tenant’s rights, nor any material increase of Tenant’s obligations, under this Lease or with respect to the Improvements.

2. 60; TERM

2.1 Term.

(a) The term of this Lease shall commence on the date (the “Commencement Date”) on which Landlord delivers possession of the Building to Tenant with Rigel having vacated the Building and with Landlord’s written, correct, good faith certification to Tenant that to the best of Landlord’s knowledge, Landlord has completed Landlord’s Work pursuant to Section 2.3(a) hereof, and shall end, unless sooner terminated or extended as hereinafter provided, on May 15, 2017 (the “Termination Date”), which is also the date on which the initial term of the Existing Lease terminates in accordance with the terms of the Existing Lease. Tenant’s minimum rental and Operating Expense obligations with respect to the Building shall begin on the date (the “Rent Commencement Date”) which is fifteen (15) days after the

Commencement Date. The parties presently estimate that the Rent Commencement Date will occur on approximately February 1, 2003.

(b) Notwithstanding the provisions of Section 2.1(a), Tenant acknowledges that Landlord’s ability to deliver the Building to Tenant free of Rigel’s rights under its existing lease of the Building is dependent upon the actual construction and completion of new buildings to be constructed for occupancy by Rigel in the Britannia Oyster Point development in South San Francisco, pursuant to a Build-to-Suit Lease dated May 16, 2001 between Slough BTC, LLC and Rigel, and Tenant agrees that Landlord shall have no liability to Tenant for any damages caused by any delay in Landlord’s completion of Landlord’s Work and delivery of the Building to Tenant as a result of any circumstances beyond Landlord’s reasonable control, including (but not limited to) any failure or inability of Slough BTC, LLC and/or Rigel to complete the construction of their respective portions of such new buildings and/or any failure or inability of Rigel to move into such new buildings in a timely manner, nor shall any such delay affect the validity of this Lease or the obligations of Tenant hereunder. Notwithstanding any other provisions of this Lease, however, if for any reason the Commencement Date has not occurred by December 31, 2003, then Tenant shall have the right to terminate this Lease by written notice to Landlord at any time prior to Landlord’s satisfaction of the conditions necessary to establish the Commencement Date hereunder.

(c) This Lease is conditional upon Landlord’s receipt and delivery to Tenant, no later than sixty (60) days after the date hereof (provided that Landlord shall have the right to extend such period for up to an additional thirty (30) days in order to continue pursuing receipt of the approval required hereunder if not received within such initial 60-day period), of written approval by Landlord’s lender, The Northwestern Mutual Life Insurance Company, of (i) the Lease Termination Agreement between Landlord and Rigel with respect to Rigel’s existing lease of the Building and (ii) the material terms of this Lease. Landlord agrees to use its best efforts to obtain such written agreement promptly following mutual execution of this Lease.

2.2 Early Possession. If Landlord, in its sole discretion, permits Tenant to have access to or possession of the Building after the Building has been vacated by Rigel but prior to the completion of Landlord’s Work, for the purpose of installing fixtures and furniture, laboratory equipment, computer equipment, telephone equipment, low voltage data wiring and personal property and other similar work preparatory to the commencement of Tenant’s business in the Building, such early access and possession shall be subject to and upon all of the terms and conditions of this Lease (including, but not limited to, conditions relating to the maintenance of required insurance), except that Tenant shall have no obligation to pay minimum rental or Operating Expenses for any period prior to the Rent Commencement Date as determined under Section 2.1; such early possession shall not advance or otherwise affect the Rent Commencement Date or the Termination Date determined under Section 2.1. Tenant shall not interfere with or delay Landlord’s contractors by any such early access or possession under this Section 2.2, shall coordinate and cooperate with Landlord and its contractors to minimize any interference or delay with respect to the completion of Landlord’s Work, and shall indemnify, defend and hold harmless Landlord and its agents and employees from and against any and all claims, demands, liabilities, actions, losses, costs and expenses, including (but not limited to) reasonable attorneys’ fees, arising out of or in connection with Tenant’s early entry upon any portion of the Building hereunder.

2.3 Condition of Premises; Landlord’s Work.

(a) Promptly following the surrender of the Building by Rigel upon termination of its existing lease of the Building, Landlord shall, at Landlord’s sole cost and expense, (i) replace all defective and/or stained ceiling and floor tiles in the Building, (ii) perform all work necessary to place the electrical, HVAC, plumbing and other existing systems in the Building in good working order and to place the Building and Improvements therein in compliance with all applicable building codes, and (iii) cause the Building to be in broom-clean condition and free of debris (collectively, “Landlord’s Work”). Except to the extent of Landlord’s obligations expressly set forth in this Section 2.3, Tenant acknowledges that it will accept and occupy the Building in “AS IS” condition as the Building exists on the date possession is surrendered by Rigel, and Landlord shall have no other obligation to improve, repair or prepare the Building for occupancy by Tenant.

(b) Landlord warrants to Tenant that on the Commencement Date, the electrical, HVAC, plumbing and other existing systems in the Building shall be in good working order and that the Building and Improvements shall be in compliance with all applicable building codes, regulations and ordinances in effect on the Commencement Date. If this warranty is violated in any respect, or if Landlord has failed in any other way to complete the performance of Landlord’s Work as described above by the Commencement Date, then it shall be the obligation of Landlord, after receipt of written notice from Tenant setting forth with specificity the nature of the violation or failure of performance, to promptly, at Landlord’s sole cost, correct the condition(s) constituting such violation or failure of performance. Tenant’s failure to give such written notice to Landlord within ninety (90) days after the Commencement Date shall give rise to a conclusive presumption that Landlord has complied with all Landlord’s obligations under this Section 2.3 and that there has been no violation of Landlord’s warranty hereunder or failure of performance with respect to Landlord’s Work, even with respect to latent defects (if any). TENANT ACKNOWLEDGES THAT THE WARRANTY CONTAINED IN THIS SECTION IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WITH RESPECT TO THE PHYSICAL CONDITION OF THE BUILDING AND IMPROVEMENTS AND THAT LANDLORD MAKES NO OTHER WARRANTIES EXCEPT AS EXPRESSLY SET FORTH IN THIS LEASE. Without limiting the generality of the foregoing, Tenant acknowledges that except as expressly set forth in this Lease, neither Landlord nor any agent of Landlord has made any representation or warranty as to the present or future suitability of the Building or Improvements for the conduct of Tenant’s business or proposed business thereon.

(c) Landlord and Tenant shall each use their respective best efforts to schedule and participate in, and to cause Rigel to participate in, a mutual walk-through of the Building within thirty (30) days after the date hereof, with the objective of promptly thereafter arriving at a list mutually approved by Landlord, Tenant and Rigel describing all material fixtures, trade fixtures, equipment (if any) and tenant improvements to be left in place in the Building by Rigel upon Rigel’s surrender of the Building, including (but not limited to) all attached fume hoods and lab benches. A copy of such list, when mutually executed by Landlord, Tenant and Rigel, shall be deemed to be attached hereto as Exhibit C and incorporated herein by this reference. Landlord shall have no obligation to enforce Rigel’s obligation to leave such items in place in the Building, but shall, upon written request by Tenant, assign to Tenant for enforcement by Tenant, in Tenant’s sole discretion, any rights and/or claims of Landlord against Rigel, under such written agreement and/or under Rigel’s existing lease of the Building, with respect to the condition in which Rigel is required to leave the Building, including (but not limited to) the leaving of the specified items in place in the Building.

2.4 Acknowledgement Of Commencement Date. Promptly following the Commencement Date, Landlord and Tenant shall execute a written acknowledgement of the Commencement Date, Rent Commencement Date, Termination Date and related matters, substantially in the form attached hereto as Exhibit D (with appropriate insertions), which acknowledgement shall be deemed to be incorporated herein by this reference. Notwithstanding the foregoing requirement, the failure of either party to execute any such written acknowledgement shall not affect the determination of the Commencement Date, Rent Commencement Date, Termination Date and related matters in accordance with the provisions of this Lease.

2.5 Holding Over. If Tenant holds possession of the Property or any portion thereof after the term of this Lease with Landlord’s written consent, then except as otherwise specified in such consent, Tenant shall become a tenant from month to month at one hundred ten percent (110%) of the rental and otherwise upon the terms herein specified for the period immediately prior to such holding over and shall continue in such status until the tenancy is terminated by either party upon not less than thirty (30) days prior written notice. If Tenant holds possession of the Property or any portion thereof after the term of this Lease without Landlord’s written consent, then Landlord in its sole discretion may elect (by written notice to Tenant) to have Tenant become a tenant either from month to month or at will, at one hundred fifty percent (150%) of the rental (prorated on a daily basis for an at-will tenancy, if applicable) and otherwise upon the terms herein specified for the period immediately prior to such holding over, or may elect to pursue any and all legal remedies available to Landlord under applicable law with respect to such unconsented holding over by Tenant. Tenant shall indemnify and hold

Landlord harmless from any loss, damage, claim, liability, cost or expense (including reasonable attorneys’ fees) resulting from any delay by Tenant in surrendering the Property or any portion thereof (except to the extent such delay is with Landlord’s prior written consent), including but not limited to any claims made by a succeeding tenant by reason of such delay. Acceptance of rent by Landlord following expiration or termination of this Lease shall not constitute a renewal of this Lease.

2.6 Option To Extend Term. Tenant shall have the option to extend the term of this Lease, at the minimum rental set forth in Section 3.1(b) and (c) and otherwise upon all the terms and provisions set forth herein with respect to the initial term of this Lease, for up to two (2) additional periods of five (5) years each, the first commencing upon the expiration of the initial term hereof and the second commencing upon the expiration of the first extended term, if any. Exercise of such option with respect to the first such extended term shall be by written notice to Landlord at least twelve (12) months prior to the expiration of the initial term hereof; exercise of such option with respect to the second extended term, if the first extension option has been duly exercised, shall be by like written notice to Landlord at least twelve (12) months prior to the expiration of the first extended term hereof. If Tenant is in default hereunder, beyond any applicable notice and cure periods, on the date of such notice or on the date any extended term is to commence, then the exercise of the option shall be of no force or effect, the extended term shall not commence and this Lease shall expire at the end of the then current term hereof (or at such earlier time as Landlord may elect pursuant to the default provisions of this Lease). If Tenant properly exercises one or more extension options under this Section, then all references in this Lease (other than in this Section 2.6) to the “term” of this Lease shall be construed to include the extension term(s) thus elected by Tenant. Except as expressly set forth in this Section 2.6, Tenant shall have no right to extend the term of this Lease beyond its prescribed term.

3. 60; RENTAL

3.1 Minimum Rental.

(a) Rental Amounts. Tenant shall pay to Landlord as minimum rental for the Building, in advance, without deduction, offset, notice or demand, on or before the Commencement Date (i.e., the date on which possession of the Building is tendered to Tenant, although the first such payment shall be applied to the rental period which begins thereafter on the Rent Commencement Date) and on or before the first day of each subsequent calendar month of the initial term of this Lease, the following amounts per month (with the counting of such months to begin on and as of the Rent Commencement Date):

Months	Monthly Minimum Rental

001 - 012	$ 259,109.75 ($ 4.2500/sq ft	)
013 - 024	269,474.14 ($ 4.4200/sq ft	)
025 - 036	280,253.11 ($ 4.5968/sq ft	)
037 - 048	291,463.23 ($ 4.7807/sq ft	)
049 - 060	303,121.76 ($ 4.9719/sq ft	)
061 - 072	315,246.63 ($ 5.1708/sq ft	)
073 - 084	327,856.49 ($ 5.3776/sq ft	)
085 - 096	340,970.75 ($ 5.5927/sq ft	)
097 - 108	354,609.58 ($ 5.8164/sq ft	)
109 - 120	368,793.97 ($ 6.0491/sq ft	)
121 - 132	383,545.73 ($ 6.2910/sq ft	)
133 - 144	398,887.56 ($ 6.5427/sq ft	)
145 - 156	414,843.06 ($ 6.8044/sq ft	)
157 - 168	431,436.78 ($ 7.0766/sq ft	)
169 - 180	448,694.25 ($ 7.3596/sq ft	)
181 - 192 (as applicable)	466,642.02 ($ 7.6540/sq ft	)
193 - 204 (if applicable)	485,307.70 ($ 7.9602/sq ft	)

If the obligation to pay minimum rental hereunder commences on other than the first day of a calendar month or if the term of this Lease terminates on other than the last day of a calendar month, the minimum rental for such first or last month of the term of this Lease, as the case may be, shall be prorated based on the number of days the term of this Lease is in effect during such month. If an increase in minimum rental becomes effective on a day other than the first day of a calendar month, the minimum rental for that month shall be the sum of the two applicable rates, each prorated for the portion of the month during which such rate is in effect.

(b) Rental Amounts During First Extended Term. If Tenant properly exercises its right to extend the term of this Lease pursuant to Section 2.6 hereof, the minimum rental during the first year of the first extended term shall be equal to ninety percent (90%) of the fair market rental value of the Building (as defined below), determined as of the commencement of such extended term in accordance with this paragraph, and during each subsequent year of the first extended term shall be equal to one hundred three percent (103%) of the minimum rental in effect during the immediately preceding year of such extended term. Upon Landlord’s receipt of a proper notice of Tenant’s exercise of its option to extend the term of this Lease, the parties shall have sixty (60) days in which to agree on the initial fair market rental for the Building at the commencement of the first extended term for the uses permitted hereunder. If the parties agree on such initial fair market rental, they shall execute an amendment to this Lease stating the amount of the applicable minimum monthly rental (including the indexed amounts applicable during subsequent years of the first extended term as described above). If the parties are unable to agree on such rental within such sixty (60) day period, then within fifteen (15) days after the expiration of such period each party, at its cost and by giving notice to the other party, shall appoint a real estate appraiser with at least five (5) years experience appraising similar commercial properties in northeastern San Mateo County to appraise and set the initial fair market rental for the Building at the commencement of the first extended term in accordance with the provisions of this Section 3.1(b). If either party fails to appoint an appraiser within the allotted time, the single appraiser appointed by the other party shall be the sole appraiser. If an appraiser is appointed by each party and the two appraisers so appointed are unable to agree upon an initial fair market rental within thirty (30) days after the appointment of the second, the two appraisers shall appoint a third similarly qualified appraiser within ten (10) days after expiration of such 30-day period; if they are unable to agree upon a third appraiser, then either party may, upon not less than five (5) days notice to the other party, apply to the Presiding Judge of the San Mateo County Superior Court for the appointment of a third qualified appraiser. Each party shall bear its own legal fees in connection with appointment of the third appraiser and shall bear one-half of any other costs of appointment of the third appraiser and of such third appraiser’s fee. The third appraiser, however selected, shall be a person who has not previously acted for either party in any capacity. Within thirty (30) days after the appointment of the third appraiser, a majority of the three appraisers shall set the initial fair market rental for the first extended term and shall so notify the parties. If a majority are unable to agree within the allotted time, the three appraised initial fair market rentals shall be added together and divided by three and the resulting quotient shall be the initial fair market rental for the first extended term, which determination shall be binding on the parties and shall be enforceable in any further proceedings relating to this Lease. For purposes of this Section 3.1(b), the “fair market rental” of the Building shall be determined with reference to the then prevailing market rental rates for properties in the City of South San Francisco with shell and office, laboratory and research and development improvements and site (common area) improvements comparable to those then existing in the Building and on the Property, taking into account for such determination all tenant improvements constructed at Landlord’s expense and paid for by Landlord or by Tenant through additional rent (including, but not limited to, all fixtures, equipment and laboratory improvements in place in the Building on the Commencement Date), but excluding from such determination any alterations or improvements constructed by Tenant at its sole expense after the Commencement Date.

(c) Rental Amounts During Second Extended Term. If Tenant properly exercises its right to a second extended term of this Lease pursuant to Section 2.6 hereof, the minimum rental during such second extended term shall be determined in the same manner provided in the preceding paragraph for the first extended term (including the indexation provision for years after the first year of such second extended term), except that the determination shall be made as of the commencement of the second extended term.

3.2 Late Charge. If Tenant fails to pay when due rental or other amounts due Landlord hereunder, such unpaid amounts shall bear interest for the benefit of Landlord at a rate equal to the lesser of fifteen percent (15%) per annum or the maximum rate permitted by law, from the date due to the date of payment. In addition to such interest, Tenant shall pay to Landlord a late charge in an amount equal to six percent (6%) of any installment of minimum rental and any other amounts due Landlord if not paid in full on or before the fifth (5th) day after such rental or other amount is due. Tenant acknowledges that late payment by Tenant to Landlord of rental or other amounts due hereunder will cause Landlord to incur costs not contemplated by this Lease, including, without limitation, processing and accounting charges and late charges which may be imposed on Landlord by the terms of any loan relating to the Property. Tenant further acknowledges that it is extremely difficult and impractical to fix the exact amount of such costs and that the late charge set forth in this Section 3.2 represents a fair and reasonable estimate thereof. Acceptance of any late charge by Landlord shall not constitute a waiver of Tenant’s default with respect to overdue rental or other amounts, nor shall such acceptance prevent Landlord from exercising any other rights and remedies available to it. Acceptance of rent or other payments by Landlord shall not constitute a waiver of late charges or interest accrued with respect to such rent or other payments or any prior installments thereof, nor of any other defaults by Tenant, whether monetary or non-monetary in nature, remaining uncured at the time of such acceptance of rent or other payments.

4. [Omitted.]

5. [Omitted.]

6. 60; TAXES

6.1 Personal Property. Tenant shall be responsible for and shall pay prior to delinquency all taxes and assessments levied against or by reason of (a) any and all alterations, additions and items installed or placed on or in the Building and taxed as personal property rather than as real property, and/or (b) all personal property, trade fixtures and other property placed by Tenant on or about the Property. Upon request by Landlord, Tenant shall furnish Landlord with satisfactory evidence of Tenant’s payment thereof. If at any time during the term of this Lease any of said alterations, additions or personal property, whether or not belonging to Tenant, shall be taxed or assessed as part of the Property, then such tax or assessment shall be paid by Tenant to Landlord within fifteen (15) days after presentation by Landlord of copies of the tax bills in which such taxes and assessments are included and shall, for the purposes of this Lease, be deemed to be personal property taxes or assessments under this Section 6.1.

6.2 Real Property. To the extent any real property taxes and assessments on the Property (including, but not limited to, the Improvements or any portion thereof) are assessed directly to Tenant, Tenant shall be responsible for and shall pay prior to delinquency all such taxes and assessments levied against the Property. Upon request by Landlord, Tenant shall furnish Landlord with satisfactory evidence of Tenant’s payment thereof. To the extent the Property and/or Improvements are taxed or assessed to Landlord following the Rent Commencement Date, such real property taxes and assessments shall constitute Operating Expenses (as that term is defined in Section 7.2 of this Lease) and shall be paid in accordance with the provisions of Article 7 of this Lease.

7. 60; OPERATING EXPENSES

7.1 Payment of Operating Expenses.

(a) Tenant shall pay to Landlord, at the time and in the manner hereinafter set forth, as additional rental, an amount equal to ten and eighty-three hundredths percent (10.83%) (“Tenant’s Operating Cost Share”) of the Operating Expenses defined in Section 7.2; provided, however, that the Tenant’s Operating Cost Share set forth in the preceding portion of this sentence shall apply only to expenses that are determined and allocated by Landlord on a Center-wide or multi-building basis, subject to any adjustments required under any other applicable

provisions of this Section 7.1, and that Tenant’s Operating Cost Share shall be one hundred percent (100%) with respect to any Operating Expenses defined in Section 7.2 that are reasonably allocable solely to the Building and/or to the separate legal parcel on which the Building is located. As of the date of this Lease, Landlord represents that the Building is the only building located on the separate legal parcel on which the Building is located, that Landlord’s current practice is to allocate only the security expenses for the Center on a Center-wide basis and that all other Operating Expenses (including, but not limited to, real and personal property taxes and assessments, insurance, Building maintenance, property management, landscape maintenance and irrigation, and parking area maintenance and lighting) are determined and allocated on a stand-alone basis to the Building and/or to the separate legal parcel on which the Building is located.

(b) Tenant’s Operating Cost Share as specified in paragraph (a) of this Section with respect to Operating Expenses which are determined and allocated on a Center-wide or multi-building basis is based upon an area of 60,967 square feet for the Building and upon an aggregate area of 562,859 square feet for the existing buildings owned by Landlord in the Center and consolidated with the Building for operation, maintenance, common area and Operating Expense purposes. If the actual area of the buildings owned from time to time by Landlord in the Center and consolidated with the Building for operation, maintenance, common area and Operating Expense purposes, as such area is determined in good faith by Landlord’s architect on the same basis of measurement under which the Building has been determined to contain 60,967 square feet (from the exterior faces of exterior walls and from the dripline of any overhangs, except that in the case of any two-story recesses or overhangs, the area to the dripline of the overhang shall be counted as part of the area of the first story but not as part of the area of the second story), differs from the assumed figure set forth above (including, but not limited to, any such difference arising from the construction of additional buildings in the Center as contemplated in Section 7.1(c) hereof), then Tenant’s Operating Cost Share as it applies to Operating Expenses that are determined and allocated on a Center-wide or multi-building basis shall be adjusted to reflect the actual areas so determined as they exist from time to time.

(c) If Landlord at any time constructs additional buildings in the Center or on any adjacent property owned by Landlord and operated, for common area purposes, on an integrated basis with the Center, then Tenant’s Operating Cost Share as it applies to Operating Expenses that are determined and allocated on a Center-wide or multi-building basis shall be adjusted to be equal to the percentage determined by dividing the gross square footage of the Building as it exists from time to time by the gross square footage of all buildings located in the Center or on any applicable adjacent property owned by Landlord as described above. In determining such percentage, a building shall be taken into account from and after the date on which a tenant first enters into possession of the building or a portion thereof, and the good faith determination of the gross square footage of any such building by Landlord’s architects shall be final and binding upon the parties.

7.2 Definition Of Operating Expenses.

(a) Subject to the exclusions and provisions hereinafter contained, the term “Operating Expenses” shall mean the total costs and expenses incurred by or allocable to Landlord for management, operation and maintenance of the Improvements, the Building, the Property and the Center (or, in the case of items that are determined and allocated on a stand-alone basis as described in Section 7.1, that portion of the Property and the Center that consists of the separate legal parcel on which the Building is located), including, without limitation, costs and expenses of (i) insurance (including earthquake and environmental insurance), property management, landscaping, and the operation, repair and maintenance of buildings and Common Areas; (ii) all utilities and services; (iii) real and personal property taxes and assessments or substitutes therefor levied or assessed against the Center or any part thereof, including (but not limited to) any possessory interest, use, business, license or other taxes or fees, any taxes imposed directly on rents or services, any assessments or charges for police or fire protection, housing, transit, open space, street or sidewalk construction or maintenance or other similar services from time to time by any governmental or quasi-governmental entity, and any other new taxes on landlords in addition to taxes now in effect; (iv) supplies, equipment, utilities and tools used in management, operation and maintenance of the Center; (v) capital improvements to the Center, the Improvements or the Building, amortized over a reasonable period, (aa) which reduce

or will cause future reduction of other items of Operating Expenses for which Tenant is otherwise required to contribute or (bb) which are required by law, ordinance, regulation or order of any governmental authority or (cc) of which Tenant has use or which benefit Tenant; and (vi) any other costs (including, but not limited to, any parking or utilities fees or surcharges) allocable to or paid by Landlord, as owner of the Center, Building or Improvements, pursuant to any applicable laws, ordinances, regulations or orders of any governmental or quasi-governmental authority or pursuant to the terms of any declarations of covenants, conditions and restrictions now or hereafter affecting the Center or any other property over which Tenant has non-exclusive use rights as contemplated in Section 1.1(b) hereof. Operating Expenses shall not include any costs attributable to Landlord’s Work, nor any costs attributable to the initial construction of the Building or of Common Area improvements in the Center. The distinction between items of ordinary operating maintenance and repair and items of a capital nature shall be made in accordance with generally accepted accounting principles applied on a consistent basis or in accordance with tax accounting principles, as determined in good faith by Landlord’s accountants.

(b) Notwithstanding anything to the contrary contained in this Lease, the following shall not be included within Operating Expenses:

(i) Costs of maintenance or repair of the roof membrane for any building, except during periods (if any) in which costs of maintenance or repair of the roof membrane for the Building are likewise included as an Operating Expense (rather than being incurred directly by Tenant or passed through directly to Tenant);

(ii) Leasing commissions, attorneys’ fees, costs, disbursements, and other expenses incurred in connection with negotiations or disputes with tenants, or in connection with leasing, renovating or improving space for tenants or other occupants or prospective tenants or other occupants of the Center or of any other property owned by Landlord;

(iii) The cost of any service sold to any tenant (including Tenant) or other occupant for which Landlord is entitled to be reimbursed as an additional charge or rental over and above the basic rent and operating expenses payable under the lease with that tenant;

(iv) Any depreciation on the Building or on any other improvements in the Center or on any other property owned by Landlord;

(v) Expenses in connection with services or other benefits of a type that are not offered or made available to Tenant but that are provided to another tenant of the Center or of any other property owned by Landlord;

(vi) Costs incurred due to Landlord’s violation of any terms or conditions of this Lease or of any other lease relating to the Building or to any other portion of the Center or of any other property owned by Landlord;

(vii) Overhead profit increments paid to any subsidiary or affiliate of Landlord for management or other services on or to the Center or any portion thereof or any other property owned by Landlord, or for supplies or other materials to the extent that the cost of the services, supplies or materials exceeds the cost that would have been paid had the services, supplies or materials been provided by unaffiliated parties on a competitive basis;

(viii) All interest, loan fees and other carrying costs related to any mortgage or deed of trust or related to any capital item, and all rental and other amounts payable under any ground or underlying lease, or under any lease for any equipment ordinarily considered to be of a capital nature (except (A) janitorial equipment which is not affixed to the Building and/or (B) equipment the cost of which, if purchased, would be considered an amortizable Operating Expense under the provisions of this Section 7.2, notwithstanding the capital nature of such equipment);

(ix) Any compensation paid to clerks, attendants or other persons in commercial concessions operated by Landlord;

(x) Advertising and promotional expenditures;

(xi) Costs of repairs and other work occasioned by fire, windstorm or other casualty of an insurable nature, except to the extent of any applicable deductible amounts under insurance actually carried by Landlord;

(xii) Any costs, fines or penalties incurred due to violations by Landlord of any governmental rule or authority or of this Lease or any other lease of any portion of the Center or any other property owned by Landlord, or due to Landlord’s negligence or willful misconduct;

(xiii) Management fees to the extent they exceed, in any given period, one percent (1%) of gross income (rent and Operating Expenses) received by Landlord with respect to the Center (and any other property owned by Landlord and operated on an integrated basis with the Center for operation, maintenance and common area purposes) during the applicable period;

(xiv) Costs for sculpture, paintings or other objects of art, and for any insurance thereon or extraordinary security in connection therewith;

(xv) Wages, salaries or other compensation paid to any executive employees above the grade of building manager;

(xvi) The cost of correcting any building code or other violations which were violations prior to the Commencement Date;

(xvii) The cost of containing, removing or otherwise remediating any contamination of the Center (including the underlying land and groundwater) by any toxic or hazardous materials (including, without limitation, asbestos and PCBs); and

(xviii) Premiums for earthquake insurance coverage, but only to the extent (if any) that such premiums exceed, in any applicable period, a commercially reasonable rate, taking into account all relevant factors (including, but not limited to, the nature, size and location of the Center, the nature and value of the improvements therein that are owned by or insurable by Landlord, and the general availability and cost of commercial earthquake insurance in the insurance markets existing from time to time during the term of this Lease).

7.3 Determination Of Operating Expenses. On or before the Rent Commencement Date and during the last month of each calendar year of the term of this Lease (“Lease Year”), or as soon thereafter as practical, Landlord shall provide Tenant notice of Landlord’s estimate of the Operating Expenses for the ensuing Lease Year or applicable portion thereof. On or before the first day of each month during the ensuing Lease Year or applicable portion thereof, beginning on the Rent Commencement Date, Tenant shall pay to Landlord Tenant’s Operating Cost Share of the portion of such estimated Operating Expenses allocable (on a prorata basis) to such month; provided, however, that if such notice is not given in the last month of a Lease Year, Tenant shall continue to pay on the basis of the prior year’s estimate, if any, until the month after such notice is given. If at any time or times it appears to Landlord that the actual Operating Expenses will vary from Landlord’s estimate by more than five percent (5%), Landlord may, by notice to Tenant, revise its estimate for such year and subsequent payments by Tenant for such year shall be based upon such revised estimate.

7.4 Final Accounting For Lease Year.

(a) Within ninety (90) days after the close of each Lease Year, or as soon after such 90-day period as practicable, Landlord shall deliver to Tenant a statement of Tenant’s Operating Cost Share of the Operating Expenses for such Lease Year prepared by Landlord from Landlord’s books and records, which statement shall be final and binding on Landlord and Tenant (except as provided in Section 7.4(b)). If on the basis of such statement Tenant owes an amount that is more or less than the estimated payments for such Lease Year previously made by Tenant, Tenant or Landlord, as the case may be, shall pay the deficiency to the other party within thirty (30) days after delivery of the statement. Failure or inability of Landlord to deliver the

annual statement within such ninety (90) day period shall not impair or constitute a waiver of Tenant’s obligation to pay Operating Expenses, or cause Landlord to incur any liability for damages.

(b) At any time within three (3) months after receipt of Landlord’s annual statement of Operating Expenses as contemplated in Section 7.4(a), Tenant shall be entitled, upon reasonable written notice to Landlord and during normal business hours at Landlord’s office or such other places as Landlord shall designate, to inspect and examine those books and records of Landlord relating to the determination of Operating Expenses for the immediately preceding Lease Year covered by such annual statement or, if Tenant so elects by written notice to Landlord, to request an independent audit of such books and records. The independent audit of the books and records shall be conducted by a certified public accountant acceptable to both Landlord and Tenant or, if the parties are unable to agree, by a certified public accountant appointed by the Presiding Judge of the San Mateo County Superior Court upon the application of either Landlord or Tenant (with notice to the other party). In either event, such certified public accountant shall be one who is not then employed in any capacity by Landlord or Tenant or by any of their respective affiliates. The audit shall be limited to the determination of the amount of Operating Expenses for the subject Lease Year, and shall be based on generally accepted accounting principles and tax accounting principles, consistently applied. If it is determined, by mutual agreement of Landlord and Tenant or by independent audit, that the amount of Operating Expenses billed to or paid by Tenant for the applicable Lease Year was incorrect, then the appropriate party shall pay to the other party the deficiency or overpayment, as applicable, within thirty (30) days after the final determination of such deficiency or overpayment. All costs and expenses of the audit shall be paid by Tenant unless the audit shows that Landlord overstated Operating Expenses for the subject Lease Year by more than five percent (5%), in which case Landlord shall pay all costs and expenses of the audit. Each party agrees to maintain the confidentiality of the findings of any audit in accordance with the provisions of this Section 7.4.

7.5 Proration. If the Rent Commencement Date falls on a day other than the first day of a Lease Year or if this Lease terminates on a day other than the last day of a Lease Year, then the amount of Operating Expenses payable by Tenant with respect to such first or last partial Lease Year shall be prorated on the basis which the number of days during such Lease Year in which this Lease is in effect bears to 365. The termination of this Lease shall not affect the obligations of Landlord and Tenant pursuant to Section 7.4 to be performed after such termination.

8. 60; UTILITIES

8.1 Payment. Commencing with the Rent Commencement Date and thereafter throughout the term of this Lease, Tenant shall pay, before delinquency, all charges for water, gas, heat, light, electricity, power, sewer, telephone, alarm system, janitorial and other services or utilities supplied to or consumed in or with respect to the Building (other than any separately metered costs for water, electricity or other services or utilities furnished with respect to the Common Areas, which costs shall be paid by Landlord and shall constitute Operating Expenses under Section 7.2 hereof), including any taxes on such services and utilities. It is the intention of the parties that all such services shall be separately metered to the Building. In the event that any of such services supplied to the Building are not separately metered, then the amount thereof shall be an item of Operating Expenses and shall be paid as provided in Article 7.

8.2 Interruption. There shall be no abatement of rent or other charges required to be paid hereunder and Landlord shall not be liable in damages or otherwise for interruption or failure of any service or utility furnished to or used with respect to the Building or Property because of accident, making of repairs, alterations or improvements, severe weather, difficulty or inability in obtaining services or supplies, labor difficulties or any other cause. Notwithstanding the foregoing provisions of this Section 8.2, however, in the event of any interruption or failure of any service or utility to the Building that (i) is caused in whole or in material part by the active negligence or willful misconduct of Landlord or its agents or employees and (ii) continues for more than three (3) business days and (iii) materially impairs Tenant’s ability to use the Building for its intended purposes hereunder, then following such three (3) business day period, Tenant’s

obligations for payment of rent and other charges under this Lease shall be abated in proportion to the degree of impairment of Tenant’s use of the Building, and such abatement shall continue until Tenant’s use of the Building is no longer materially impaired thereby.

9. 60; ALTERATIONS; SIGNS

9.1 Right To Make Alterations. Tenant shall make no alterations, additions or improvements to the Building or the Property, other than interior non-structural alterations costing less than Fifty Thousand Dollars ($50,000.00) in the aggregate during any twelve (12) month period, without the prior written consent of Landlord, which consent shall not be unreasonably withheld or delayed. All such alterations, additions and improvements shall be completed with due diligence in a first-class workmanlike manner, in compliance with plans and specifications approved in writing by Landlord and in compliance with all applicable laws, ordinances, rules and regulations, and to the extent Landlord’s consent is not otherwise required hereunder for such alterations, additions or improvements, Tenant shall give prompt written notice thereof to Landlord. Tenant shall cause any contractors engaged by Tenant for work in the Building or on the Property to maintain public liability and property damage insurance, and other customary insurance, with such terms and in such amounts as Landlord may reasonably require, naming as additional insureds Landlord and any of its partners, shareholders, property managers and lenders designated by Landlord for this purpose, and shall furnish Landlord with certificates of insurance or other evidence that such coverage is in effect. Notwithstanding any other provisions of this Section 9.1, under no circumstances shall Tenant make any structural alterations or improvements, or any substantial changes to the roof or substantial equipment installations on the roof, or any substantial changes or alterations to the building systems, without Landlord’s prior written consent (which consent shall not be unreasonably withheld or delayed). If Tenant so requests in seeking Landlord’s consent to any alterations, additions or improvements, Landlord shall specify in granting such consent whether Landlord intends to require that Tenant remove such alterations, additions or improvements (or any specified portions thereof) upon expiration or termination of this Lease. Landlord shall receive no fee for supervision, profit, overhead or general conditions in connection with any alterations, additions or improvements constructed or installed by Tenant under this Lease.

9.2 Title To Alterations. All alterations, additions and improvements installed in, on or about the Building or the Property shall become part of the Property and shall become the property of Landlord, unless Landlord elects to require Tenant to remove the same upon the termination of this Lease; provided, however, that the foregoing shall not apply to Tenant’s movable furniture and equipment and trade fixtures. Tenant shall promptly repair any damage caused by its removal of any such furniture, equipment or trade fixtures. Notwithstanding any other provisions of this Article 9, however, (a) under no circumstances shall Tenant have any right to remove from the Building or the Property, during the term of this Lease or at the expiration or termination of this Lease, any lab benches, fume hoods, cold rooms or other similar improvements and equipment existing in the Building on the Commencement Date, except with Landlord’s written consent (which consent may take the form of either (i) a separate written consent or (ii) a written approval of plans for proposed alterations or improvements, if and to the extent that such plans specifically show the removal or relocation of any existing lab benches, fume hoods, cold rooms or other similar improvements or equipment as part of the proposed alterations or improvements), and (b) if Tenant requests Landlord’s written consent to any alterations, additions or improvements under Section 9.1 hereof and, in requesting such consent, asks that Landlord specify whether Landlord will require removal of such alterations, additions or improvements upon termination or expiration of this Lease, then Landlord shall not be entitled to require such removal unless Landlord specified its intention to do so at the time of granting of Landlord’s consent to the requested alterations, additions or improvements.

9.3 Tenant Fixtures. Subject to the final sentence of Section 9.2 and to Section 9.5, Tenant may install, remove and reinstall trade fixtures without Landlord’s prior written consent, except that installation and removal of any fixtures which are affixed to the Building or the Property or which affect the exterior or structural portions of the Building or the building systems shall require Landlord’s written approval, which approval shall not be unreasonably withheld or delayed. Subject to the provisions of Section 9.5, the foregoing shall apply to Tenant’s signs, logos and insignia, all of which Tenant shall have the right to place and

remove and replace (a) only with Landlord’s prior written consent as to location, size and composition, which consent shall not be unreasonably withheld or delayed, and (b) only in compliance with all restrictions and requirements of applicable law and of any covenants, conditions and restrictions or other written agreements now or hereafter applicable to the Property. Tenant shall immediately repair any damage caused by installation and removal of fixtures under this Section 9.3.

9.4 No Liens. Tenant shall at all times keep the Building and the Property free from all liens and claims of any contractors, subcontractors, materialmen, suppliers or any other parties employed either directly or indirectly by Tenant in construction work on the Building or the Property. Tenant may contest any claim of lien, but only if, prior to such contest, Tenant either (i) posts security in the amount of the claim, plus estimated costs and interest, or (ii) records a bond of a responsible corporate surety in such amount as may be required to release the lien from the Building and the Property. Tenant shall indemnify, defend and hold Landlord harmless against any and all liability, loss, damage, cost and other expenses, including, without limitation, reasonable attorneys’ fees, arising out of claims of any lien for work performed or materials or supplies furnished at the request of Tenant or persons claiming under Tenant.

9.5 Signs. Without limiting the generality of the provisions of Section 9.3 hereof, Tenant shall have the right to display its corporate name and logo on the Building and in front of the entrance to the Building, subject to Landlord’s prior approval as to location, size, design and composition (which approval shall not be unreasonably withheld or delayed), subject to the established sign criteria for the Britannia Pointe Grand Business Park and subject to all restrictions and requirements of applicable law and of any covenants, conditions and restrictions or other written agreements now or hereafter applicable to the Property.

10. &# 160; MAINTENANCE AND REPAIRS

10.1 Landlord’s Work.

(a) Landlord shall repair and maintain or cause to be repaired and maintained the Common Areas of the Property and the roof (structural portions only), exterior walls and other structural portions of the Building. The cost of all work performed by Landlord under this Section 10.1 shall be an Operating Expense hereunder, except to the extent such work (i) is required due to the negligence of Landlord, (ii) involves the repair or correction of a condition or defect that Landlord is required to correct pursuant to Section 5.2 hereof, (iii) is a capital expense not includible as an Operating Expense under Section 7.2 hereof, or (iv) is required due to the negligence or willful misconduct of Tenant or its agents, employees or invitees (in which event Tenant shall bear the full cost of such work pursuant to the indemnification provided in Section 12.6 hereof, subject to the release set forth in Section 12.4 hereof). Tenant knowingly and voluntarily waives the right to make repairs at Landlord’s expense, except to the extent permitted by Section 10.1(b) below, or to offset the cost thereof against rent, under any law, statute, regulation or ordinance now or hereafter in effect.

(b) If Landlord fails to perform any repairs or maintenance required to be performed by Landlord on the Building under Section 10.1(a) and such failure continues for thirty (30) days or more after Tenant gives Landlord written notice of such failure (or, if such repairs or maintenance cannot reasonably be performed within such 30-day period, then if Landlord fails to commence performance within such 30-day period and thereafter to pursue such performance diligently to completion), then Tenant shall have the right to perform such repairs or maintenance and Landlord shall reimburse Tenant for the reasonable cost thereof within fifteen (15) days after written notice from Tenant of the completion and cost of such work, accompanied by copies of invoices or other reasonable supporting documentation. Under no circumstances, however, shall Tenant have any right to offset the cost of any such work against rent or other charges falling due from time to time under this Lease.

10.2 Tenant’s Obligation For Maintenance.

(a) Good Order, Condition And Repair. Except as provided in Section 10.1 hereof, Tenant at its sole cost and expense shall keep and maintain in good and sanitary order, condition and repair the Building and every part thereof, wherever located,

including but not limited to the roof (non-structural portions only), signs, interior, ceiling, electrical system, plumbing system, telephone and communications systems of the Building, the HVAC equipment and related mechanical systems serving the Building (for which equipment and systems Tenant shall enter into a service contract with a person or entity designated or approved by Landlord), all doors, door checks, windows, plate glass, door fronts, exposed plumbing and sewage and other utility facilities, fixtures, lighting, wall surfaces, floor surfaces and ceiling surfaces of the Building and all other interior repairs, foreseen and unforeseen, with respect to the Building, as required.

(b) Landlord’s Remedy. If Tenant, after notice from Landlord, fails to make or perform promptly any repairs or maintenance which are the obligation of Tenant hereunder, Landlord shall have the right, but shall not be required, to enter the Building and make the repairs or perform the maintenance necessary to restore the Building to good and sanitary order, condition and repair. Immediately on demand from Landlord, the cost of such repairs shall be due and payable by Tenant to Landlord.

(c) Condition Upon Surrender. At the expiration or sooner termination of this Lease, Tenant shall surrender the Building and the Improvements, including any additions, alterations and improvements thereto, broom clean, in good and sanitary order, condition and repair, ordinary wear and tear excepted, first, however, removing all goods and effects of Tenant and all and fixtures and items required to be removed or specified to be removed at Landlord’s election pursuant to this Lease (including, but not limited to, any such removal required as a result of an election duly made by Landlord to require such removal as contemplated in Section 9.2), and repairing any damage caused by such removal. Tenant shall not have the right to remove fixtures or equipment if Tenant is in default hereunder unless Landlord specifically waives this provision in writing. Tenant expressly waives any and all interest in any personal property and trade fixtures not removed from the Property by Tenant at the expiration or termination of this Lease, agrees that any such personal property and trade fixtures may, at Landlord’s election, be deemed to have been abandoned by Tenant, and authorizes Landlord (at its election and without prejudice to any other remedies under this Lease or under applicable law) to remove and either retain, store or dispose of such property at Tenant’s cost and expense, and Tenant waives all claims against Landlord for any damages resulting from any such removal, storage, retention or disposal.

11. &# 160; USE OF PROPERTY

11.1 Permitted Use. Subject to Sections 11.3, 11.4 and 11.6 hereof, Tenant shall use the Building solely for a laboratory research and development facility, including (but not limited to) wet chemistry and biology labs, clean rooms, pilot scale, clinical scale and GMP scale manufacturing, storage and use of toxic and radioactive materials (subject to the provisions of Section 11.6 hereof), storage and use of laboratory animals, administrative offices, and other lawful purposes reasonably related to or incidental to such specified uses (subject in each case to receipt of all necessary approvals from the City of South San Francisco and other governmental agencies having jurisdiction over the Building), and for no other purpose.

11.2 [Omitted.]

11.3 No Nuisance. Tenant shall not use the Property for or carry on or permit upon the Property or any part thereof any offensive, noisy or dangerous trade, business, manufacture, occupation, odor or fumes, or any nuisance or anything against public policy, nor interfere with the rights or business of Landlord in the Building or the Property, nor commit or allow to be committed any waste in, on or about the Property. Tenant shall not do or permit anything to be done in or about the Property, nor bring nor keep anything therein, which will in any way cause the Property to be uninsurable with respect to the insurance required by this Lease or with respect to standard fire and extended coverage insurance with vandalism, malicious mischief and riot endorsements.

11.4 Compliance With Laws. Tenant shall not use the Property or permit the Property to be used in whole or in part for any purpose or use that is in violation of any applicable laws, ordinances, regulations or rules of any governmental agency or public authority.

Tenant shall keep the Building and Improvements equipped with all safety appliances required by law, ordinance or insurance on the Property, or any order or regulation of any public authority, because of Tenant’s particular use of the Property. Tenant shall procure all licenses and permits required for use of the Property. Tenant shall use the Property in strict accordance with all applicable ordinances, rules, laws and regulations and shall comply with all requirements of all governmental authorities now in force or which may hereafter be in force pertaining to the use of the Property by Tenant, including, without limitation, regulations applicable to noise, water, soil and air pollution, and making such nonstructural alterations and additions thereto as may be required from time to time by such laws, ordinances, rules, regulations and requirements of governmental authorities or insurers of the Property (collectively, “Requirements”) because of Tenant’s construction of improvements in or other particular use of the Property. Any structural alterations or additions required from time to time by applicable Requirements because of Tenant’s construction of improvements in the Building or other particular use of the Property shall, at Landlord’s election, either (i) be made by Tenant, at Tenant’s sole cost and expense, in accordance with the procedures and standards set forth in Section 9.1 for alterations by Tenant, or (ii) be made by Landlord at Tenant’s sole cost and expense, in which event Tenant shall pay to Landlord as additional rent, within ten (10) days after demand by Landlord, an amount equal to all reasonable costs incurred by Landlord in connection with such alterations or additions. The judgment of any court, or the admission by Tenant in any proceeding against Tenant, that Tenant has violated any law, statute, ordinance or governmental rule, regulation or requirement shall be conclusive of such violation as between Landlord and Tenant.

11.5 Liquidation Sales. Tenant shall not conduct or permit to be conducted any auction, bankruptcy sale, liquidation sale, or going out of business sale, in, upon or about the Property, whether said auction or sale be voluntary, involuntary or pursuant to any assignment for the benefit of creditors, or pursuant to any bankruptcy or other insolvency proceeding.

11.6 Environmental Matters.

(a) For purposes of this Section, “hazardous substance” shall mean the substances included within the definitions of the term “hazardous substance” under (i) the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended, 42 U.S.C. §§ 9601 et seq., and the regulations promulgated thereunder, as amended, (ii) the California Carpenter-Presley-Tanner Hazardous Substance Account Act, California Health & Safety Code §§ 25300 et seq., and regulations promulgated thereunder, as amended, (iii) the Hazardous Materials Release Response Plans and Inventory Act, California Heath & Safety Code §§ 25500 et seq., and regulations promulgated thereunder, as amended, and (iv) petroleum; “hazardous waste” shall mean (i) any waste listed as or meeting the identified characteristics of a “hazardous waste” under the Resource Conservation and Recovery Act of 1976, 42 U.S.C. §§ 6901 et seq., and regulations promulgated pursuant thereto, as amended (collectively, “RCRA”), (ii) any waste meeting the identified characteristics of “hazardous waste,” “extremely hazardous waste” or “restricted hazardous waste” under the California Hazardous Waste Control Law, California Health & Safety Code §§ 25100 et seq., and regulations promulgated pursuant thereto, as amended (collectively, the “CHWCL”), and/or (iii) any waste meeting the identified characteristics of “medical waste” under California Health & Safety Code §§ 25015-25027.8, and regulations promulgated thereunder, as amended; and “hazardous waste facility” shall mean a hazardous waste facility as defined under the CHWCL.

(b) Without limiting the generality of the obligations set forth in Section 11.4 of this Lease:

(i) Tenant shall not cause or permit any hazardous substance or hazardous waste to be brought upon, kept, stored or used in or about the Property without the prior written consent of Landlord, which consent shall not be unreasonably withheld, except that Tenant, in connection with its permitted use of the Property as provided in Section 11.1, may keep, store and use materials that constitute hazardous substances which are customary for such permitted use, provided such hazardous substances are kept, stored and used in quantities which are customary for such permitted use and are kept, stored and used in full compliance with clauses (ii) and (iii) immediately below.

(ii) Tenant shall comply with all applicable laws, rules, regulations, orders, permits, licenses and operating plans of any governmental authority with respect to the receipt, use, handling, generation, transportation, storage, treatment and/or disposal of hazardous substances or wastes by Tenant or its agents or employees, and Tenant will provide Landlord with copies of all permits, licenses, registrations and other similar documents that authorize Tenant to conduct any such activities in connection with its authorized use of the Property from time to time.

(iii) Tenant shall not (A) operate on or about the Property any facility required to be permitted or licensed as a hazardous waste facility or for which interim status as such is required, nor (B) store any hazardous wastes on or about the Property for ninety (90) days or more, nor (C) conduct any other activities on or about the Property that could result in the Property being deemed to be a “hazardous waste facility” (including, but not limited to, any storage or treatment of hazardous substances or hazardous wastes which could have such a result).

(iv) Tenant shall comply with all applicable laws, rules, regulations, orders and permits relating to underground storage tanks installed by Tenant or its agents or employees or at the request of Tenant (including any installation, monitoring, maintenance, closure and/or removal of such tanks) as such tanks are defined in California Health & Safety Code § 25281(x), including, without limitation, complying with California Health & Safety Code §§ 25280-25299.7 and the regulations promulgated thereunder, as amended. Tenant shall furnish to Landlord copies of all registrations and permits issued to or held by Tenant from time to time for any and all underground storage tanks located on or under the Property.

(v) If applicable, Tenant shall provide Landlord in writing the following information and/or documentation within fifteen (15) days after the Rent Commencement Date, and shall update such information at least annually, on or before each anniversary of the Rent Commencement Date, to reflect any change in or addition to the required information and/or documentation (provided, however, that in the case of the materials described in subparagraphs (B), (C) and (E) below, Tenant shall not be required to deliver copies of such materials to Landlord but shall maintain copies of such materials to such extent and for such periods as may be required by applicable law and shall permit Landlord or its representatives to inspect and copy such materials during normal business hours at any time and from time to time upon reasonable notice to Tenant):

(A) A list of all hazardous substances and/or wastes that Tenant receives, uses, handles, generates, transports, stores, treats or disposes of from time to time in connection with its operations on the Property.

(B) All Material Safety Data Sheets (“MSDS’s”), if any, required to be completed with respect to operations of Tenant at the Property from time to time in accordance with Title 26, California Code of Regulations § 8-5194 or 42 U.S.C. § 11021, or any amendments thereto, and any Hazardous Materials Inventory Sheets that detail the MSDS’s.

(C) All hazardous waste manifests (as defined in Title 26, California Code of Regulations § 22-66481), if any, that Tenant is required to complete from time to time in connection with its operations at the Property.

(D) A copy of any Hazardous Materials Management Plan required from time to time with respect to Tenant’s operations at the Property, pursuant to California Health & Safety Code §§ 25500 et seq., and any regulations promulgated thereunder, as amended.

(E) Any Contingency Plans and Emergency Procedures required of Tenant from time to time due to its operations in accordance with Title 26, California Code of Regulations §§ 22-67140 et seq., and any amendments thereto, and any Training Programs and Records required under Title 26, California Code of Regulations, § 22-67105, and any amendments thereto.

(F) Copies of any biennial reports to be furnished to the California Department of Health Services from time to time relating to hazardous substances or wastes, pursuant to Title 26, California Code of Regulations, § 22-66493, and any amendments thereto.

(G) Copies of all industrial wastewater discharge permits issued to or held by Tenant from time to time in connection with its operations on the Property.

(H) Copies of any other lists or inventories of hazardous substances and/or wastes on or about the Property that Tenant is otherwise required to prepare and file from time to time with any governmental or regulatory authority.

(vi) Tenant shall secure Landlord’s prior written approval for any proposed receipt, storage, possession, use, transfer or disposal of “radioactive materials” or “radiation,” as such materials are defined in Title 26, California Code of Regulations § 17-30100, and/or any other materials possessing the characteristics of the materials so defined, which approval Landlord may withhold in its sole and absolute discretion; provided, that such approval shall not be required for any radioactive materials for which Tenant has secured prior written approval of the Nuclear Regulatory Commission and delivered to Landlord a copy of such approval. Tenant, in connection with any such authorized receipt, storage, possession, use, transfer or disposal of radioactive materials or radiation, shall:

(A) Comply with all federal, state and local laws, rules, regulations, orders, licenses and permits issued to or applicable to Tenant with respect to its business operations on the Property;

(B) Maintain, to such extent and for such periods as may be required by applicable law, and permit Landlord and its representatives to inspect during normal business hours at any time and from time to time upon reasonable notice to Tenant, a list of all radioactive materials or radiation received, stored, possessed, used, transferred or disposed of by Tenant or in connection with the operation of Tenant’s business on the Property from time to time, to the extent not already disclosed through delivery of a copy of a Nuclear Regulatory Commission approval with respect thereto as contemplated above; and

(C) Maintain, to such extent and for such periods as may be required by applicable law, and permit Landlord or its representatives to inspect during normal business hours at any time and from time to time upon reasonable notice to Tenant, all licenses, registration materials, inspection reports, governmental orders and permits in connection with the receipt, storage, possession, use, transfer or disposal of radioactive materials or radiation by Tenant or in connection with the operation of Tenant’s business on the Property from time to time.

(vii) Tenant shall comply with any and all applicable laws, rules, regulations and orders of any governmental authority with respect to the release into the environment of any hazardous wastes or substances or radiation or radioactive materials by Tenant or its agents or employees. Tenant shall give Landlord immediate verbal notice of any unauthorized release of any such hazardous wastes or substances or radiation or radioactive materials into the environment, and shall follow such verbal notice with written notice to Landlord of such release within twenty-four (24) hours of the time at which Tenant became aware of such release.

(viii) Tenant shall indemnify, defend and hold Landlord harmless from and against any and all claims, losses (including, but not limited to, loss of rental income), damages, liabilities, costs, legal fees and expenses of any sort arising out of or relating to (A) any failure by Tenant to comply with any provisions of this paragraph 11.6(b), or (B) any receipt, use handling, generation, transportation, storage, treatment, release and/or disposal of any hazardous substance or waste or any radioactive material or radiation on or about the Property as a proximate result of Tenant’s use of the Property or as a result of any intentional or negligent acts or omissions of Tenant or of any agent, employee or invitee of Tenant.

(ix) Tenant shall cooperate with Landlord in furnishing Landlord with complete information regarding Tenant’s receipt, handling, use, storage, transportation, generation, treatment and/or disposal of any hazardous substances or wastes or radiation or radioactive materials. Upon request, Tenant shall grant Landlord reasonable access at reasonable times to the Property to inspect Tenant’s receipt, handling, use, storage, transportation, generation, treatment and/or disposal of hazardous substances or wastes or radiation or radioactive materials, provided that Landlord uses reasonable efforts to avoid any unreasonable interference with Tenant’s business operations in exercising such access and inspection rights, without thereby being deemed guilty of any disturbance of Tenant’s use or possession and without being liable to Tenant in any manner.

(x) Notwithstanding Landlord’s rights of inspection and review under this paragraph 11.6(b), Landlord shall have no obligation or duty to so inspect or review, and no third party shall be entitled to rely on Landlord to conduct any sort of inspection or review by reason of the provisions of this paragraph 11.6(b).

(xi) If Tenant receives, handles, uses, stores, transports, generates, treats and/or disposes of any hazardous substances or wastes or radiation or radioactive materials on or about the Property at any time during the term of this Lease, then within thirty (30) days after the termination or expiration of this Lease, Tenant at its sole cost and expense shall obtain and deliver to Landlord an environmental study, performed by an expert reasonably satisfactory to Landlord, evaluating the presence or absence of hazardous substances and wastes, radiation and radioactive materials on and about the Property. Such study shall be based on a reasonable and prudent level of tests and investigations of the Property and surrounding areas (if appropriate), which tests shall be conducted no earlier than the date of termination or expiration of this Lease. Liability for any remedial actions required or recommended on the basis of such study shall be allocated in accordance with Sections 11.4, 11.6, 12.6 and other applicable provisions of this Lease.

(c) Landlord shall indemnify, defend and hold Tenant harmless from and against any and all claims, losses, damages, liabilities, costs, legal fees and expenses of any sort arising out of or relating to (i) the presence on the Property of any hazardous substances or wastes or radiation or radioactive materials as of the Rent Commencement Date (other than as a result of any intentional or negligent acts or omissions of Tenant or of any agent, employee or invitee of Tenant), (ii) any unauthorized release into the environment (including, but not limited to, the Property) of any hazardous substances or wastes or radiation or radioactive materials to the extent such release results from the negligence of or willful misconduct or omission by Landlord or its agents or employees, and/or (iii) the presence on the Property of any hazardous substances or wastes or radiation or radioactive materials arising after the Rent Commencement Date from any cause or source other than as a result of any intentional or negligent acts or omissions of Tenant or of any agent, employee or invitee of Tenant.

(d) The provisions of this Section 11.6 shall survive the termination of this Lease.

12. &# 160; INSURANCE AND INDEMNITY

12.1 Insurance.

(a) Tenant shall procure and maintain in full force and effect at all times during the term of this Lease, at Tenant’s cost and expense, commercial general liability insurance to protect against liability to the public, or to any invitee of Tenant or Landlord, arising out of or related to the use of or resulting from any accident occurring in, upon or about the Property, with limits of liability of not less than (i) Two Million Dollars ($2,000,000.00) for injury to or death of one person, (ii) Five Million Dollars ($5,000,000.00) for personal injury or death, per occurrence, and (iii) One Million Dollars ($1,000,000.00) for property damage, or combined single limit of liability of not less than Five Million Dollars ($5,000,000.00). Such insurance shall name Landlord, its general partners, its Managing Agent and any lender holding a deed of trust on the Property from time to time (as designated in writing by Landlord to Tenant from time to time) as additional insureds thereunder. The amount of such insurance shall not be construed to limit any liability or obligation of Tenant under this Lease. Tenant shall also

procure and maintain in full force and effect at all times during the term of this Lease, at Tenant’s cost and expense, products/completed operations coverage on terms and in amounts (A) customary in Tenant’s industry for companies engaged in the marketing of products on a scale comparable to that in which Tenant is engaged from time to time and (B) mutually satisfactory to Landlord and Tenant in their respective reasonable discretion.

(b) Landlord shall procure and maintain in full force and effect at all times during the term of this Lease, at Landlord’s cost and expense (but reimbursable as an Operating Expense under Section 7.2 hereof), commercial general liability insurance to protect against liability arising out of or related to the use of or resulting from any accident occurring in, upon or about the Property, with combined single limit of liability of not less than Five Million Dollars ($5,000,000.00) per occurrence for bodily injury and property damage.

(c) Landlord shall procure and maintain in full force and effect at all times during the term of this Lease, at Landlord’s cost and expense (but reimbursable as an Operating Expense under Section 7.2 hereof), policies of property insurance providing protection against “all risk of direct physical loss” (as defined by and detailed in the Insurance Service Office’s Commercial Property Program “Cause of Loss—Special Form [CP1030]” or its equivalent) for the shell of the Building and for the improvements in the Common Areas of the Property, on a full replacement cost basis (with no co-insurance or, if coverage without co-insurance is not reasonably available, then on an “agreed amount” basis). Such insurance shall include earthquake and environmental coverage and shall have such commercially reasonable deductibles and other terms as Landlord in its reasonable discretion determines to be appropriate. Landlord shall have no obligation to carry property damage insurance for any alterations, additions or improvements installed by Tenant or by any predecessor tenant in the Building or on or about the Property.

(d) Landlord shall procure and maintain in full force and effect at all times during the term of this Lease, at Tenant’s cost and expense (chargeable, in Landlord’s discretion, either as an Operating Expense allocable 100% to the Building or as a direct pass-through to Tenant), policies of property insurance providing protection against “all risk of direct physical loss” (as defined by and detailed in the Insurance Service Office’s Commercial Property Program “Cause of Loss-Special Form [CP1030]” or its equivalent) for the tenant improvements existing in the Building on the Commencement Date and on all other alterations, additions and improvements installed by Tenant from time to time in or about the Building, on a full replacement cost basis (with no co-insurance or, if coverage without co-insurance is not reasonably available, then on an “agreed amount” basis). Such insurance may have such commercially reasonable deductibles and other terms as Landlord in its discretion determines to be appropriate, and shall name both Tenant and Landlord as insureds as their interests may appear. The coverage required to be maintained under this paragraph (d) may, in Landlord’s discretion, be added to or combined with Landlord’s master policy carried under paragraph (c) above, in which event Tenant shall be named as an insured only with respect to the portion of the policy that covers tenant improvements as described in this paragraph (d). Tenant shall provide to Landlord from time to time, upon request by Landlord annually or at other reasonable intervals, an updated schedule of values for the existing tenant improvements and any subsequently constructed tenant improvements in the Building, and Landlord shall have no obligation or liability with respect to any underinsurance of tenant improvements that results from Tenant’s failure to keep Landlord informed from time to time, on a current basis, of the insurable value of the tenant improvements in the Building.

12.2 Quality Of Policies And Certificates. All policies of insurance required hereunder shall be issued by responsible insurers and, in the case of policies carried or required to be carried by Tenant, shall be written as primary policies not contributing with and not in excess of any coverage that Landlord may carry. Tenant shall deliver to Landlord copies of policies or certificates of insurance showing that said policies are in effect. The coverage provided by such policies shall include the clause or endorsement referred to in Section 12.4. If Tenant fails to acquire, maintain or renew any insurance required to be maintained by it under this Article 12 or to pay the premium therefor, then Landlord, at its option and in addition to its other remedies, but without obligation so to do, may procure such insurance, and any sums expended by it to procure any such insurance on behalf of or in place of Tenant shall be repaid upon demand, with interest as provided in Section 3.2 hereof. Tenant shall obtain written

undertakings from each insurer under policies required to be maintained by it to notify all insureds thereunder at least thirty (30) days prior to cancellation of coverage.

12.3 Workers’ Compensation. Tenant shall maintain in full force and effect during the term of this Lease workers’ compensation insurance in at least the minimum amounts required by law, covering all of Tenant’s employees working on the Property.

12.4 Waiver Of Subrogation. To the extent permitted by law and without affecting the coverage provided by insurance required to be maintained hereunder, Landlord and Tenant each waive any right to recover against the other with respect to (i) damage to property, (ii) damage to the Property or any part thereof, or (iii) claims arising by reason of any of the foregoing, but only to the extent that any of the foregoing damages and claims under clauses (i)-(iii) hereof are covered, and only to the extent of such coverage, by casualty insurance actually carried or required to be carried hereunder by either Landlord or Tenant. This provision is intended to waive fully, and for the benefit of each party, any rights and claims which might give rise to a right of subrogation in any insurance carrier. Each party shall procure a clause or endorsement on any casualty insurance policy denying to the insurer rights of subrogation against the other party to the extent rights have been waived by the insured prior to the occurrence of injury or loss. Coverage provided by insurance maintained by Tenant shall not be limited, reduced or diminished by virtue of the subrogation waiver herein contained.

12.5 Increase In Premiums. Tenant shall do all acts and pay all expenses necessary to insure that the Property is not used for purposes prohibited by any applicable fire insurance, and that Tenant’s use of the Property complies with all requirements necessary to obtain any such insurance. If Tenant uses or permits the Property to be used in a manner which increases the existing rate of any insurance carried by Landlord on the Property and such use continues for longer than a reasonable period specified in any written notice from Landlord to Tenant identifying the rate increase and the factors causing the same, then Tenant shall pay the amount of the increase in premium caused thereby, and Landlord’s costs of obtaining other replacement insurance policies, including any increase in premium, within ten (10) days after demand therefor by Landlord.

12.6 Indemnification.

(a) Tenant shall indemnify, defend and hold Landlord and its partners, shareholders, officers, directors, agents and employees harmless from any and all liability for injury to or death of any person, or loss of or damage to the property of any person, and all actions, claims, demands, costs (including, without limitation, reasonable attorneys’ fees), damages or expenses of any kind arising therefrom which may be brought or made against Landlord or which Landlord may pay or incur by reason of the use, occupancy and enjoyment of the Property by Tenant or any invitees, sublessees, licensees, assignees, employees, agents or contractors of Tenant or holding under Tenant (including, but not limited to, any such matters arising out of or in connection with any early entry upon the Property by Tenant pursuant to Section 2.2 hereof) from any cause whatsoever other than negligence or willful misconduct or omission by Landlord, its agents or employees. Landlord and its partners, shareholders, officers, directors, agents and employees shall not be liable for, and Tenant hereby waives all claims against such persons for, damages to goods, wares and merchandise in or upon the Property, or for injuries to Tenant, its agents or third persons in or upon the Property, from any cause whatsoever other than negligence or willful misconduct or omission by Landlord, its agents or employees. Tenant shall give prompt notice to Landlord of any casualty or accident in, on or about the Property.

(b) Landlord shall indemnify, defend and hold Tenant and its partners, shareholders, officers, directors, agents and employees harmless from any and all liability for injury to or death of any person, or loss of or damage to the property of any person, and all actions, claims, demands, costs (including, without limitation, reasonable attorneys’ fees), damages or expenses of any kind arising therefrom which may be brought or made against Tenant or which Tenant may pay or incur, to the extent such liabilities or other matters arise in, on or about the Property by reason of any negligence or willful misconduct or omission by Landlord, its agents or employees.

12.7 Blanket Policy. Any policy required to be maintained hereunder may be maintained under a so-called “blanket policy” insuring other parties and other locations so long as the amount of insurance required to be provided hereunder is not thereby diminished.

13. &# 160; SUBLEASE AND ASSIGNMENT

13.1 Assignment And Sublease Of Building. Except in the case of a Permitted Transfer, Tenant shall not have the right or power to assign its interest in this Lease, or make any sublease of the Building or any portion thereof, nor shall any interest of Tenant under this Lease be assignable involuntarily or by operation of law, without on each occasion obtaining the prior written consent of Landlord, which consent shall not be unreasonably withheld or delayed. Any purported sublease or assignment of Tenant’s interest in this Lease requiring but not having received Landlord’s consent thereto (to the extent such consent is required hereunder) shall be void. Without limiting the generality of the foregoing, Landlord may withhold consent to any proposed subletting or assignment for which consent is requested solely on the ground, if applicable, that the use by the proposed subtenant or assignee is reasonably likely to be incompatible with Landlord’s use of any adjacent property owned or operated by Landlord, unless the proposed use is within the permitted uses specified in Section 11.1, in which event it shall not be reasonable for Landlord to object to the proposed use. Except in the case of a Permitted Transfer, any dissolution, consolidation, merger or other reorganization of Tenant, or any sale or transfer of substantially all of the stock or assets of Tenant in a single transaction or series of related transactions, shall be deemed to be an assignment hereunder and shall be void without the prior written consent of Landlord as required above. Notwithstanding the foregoing, (i) an initial public offering of the common stock of Tenant shall not be deemed to be an assignment hereunder; (ii) any transfer of Tenant’s stock during any period in which Tenant has a class of stock listed on any recognized securities exchange or traded in the NASDAQ over-the-counter market shall not be deemed to be an assignment hereunder; (iii) any transfer of Tenant’s stock in connection with a bona fide financing, capitalization or recapitalization of Tenant shall not be deemed to be an assignment hereunder, provided that such financing, capitalization or recapitalization does not result in a material reduction in Tenant’s net worth or materially change the nature of Tenant’s ongoing business as a going concern; and (iv) Tenant shall have the right to assign this Lease or sublet the Building, or any portion thereof, without Landlord’s consent (but with prior or concurrent written notice by Tenant to Landlord, except to the extent Tenant is advised by its counsel that such prior or concurrent notice would be in violation of applicable law, in which event Tenant shall give such written notice as soon as reasonably possible after the giving of such notice is no longer in violation of applicable law), to any Affiliate of Tenant, or to any entity which results from a merger or consolidation with Tenant, or to any entity which acquires substantially all of the stock or assets of Tenant as a going concern (hereinafter each a “Permitted Transfer”). For purposes of the preceding sentence, an “Affiliate” of Tenant shall mean any entity in which Tenant owns at least a twenty percent (20%) equity interest, any entity which owns at least a twenty percent (20%) equity interest in Tenant, and/or any entity which is related to Tenant by a chain of ownership interests involving at least a twenty percent (20%) equity interest at each level in the chain. Landlord shall have no right to terminate this Lease in connection with, and shall have no right to any sums or other economic consideration resulting from, any Permitted Transfer. Except as expressly set forth in this Section 13.1, however, the provisions of Section 13.2 shall remain applicable to any Permitted Transfer and the transferee under such Permitted Transfer shall be and remain subject to all of the terms and provisions of this Lease.

13.2 Rights Of Landlord.

(a) Consent by Landlord to one or more assignments of this Lease, or to one or more sublettings of the Building or any portion thereof, or collection of rent by Landlord from any assignee or sublessee, shall not operate to exhaust Landlord’s rights under this Article 13, nor constitute consent to any subsequent assignment or subletting. No assignment of Tenant’s interest in this Lease and no sublease shall relieve Tenant of its obligations hereunder, notwithstanding any waiver or extension of time granted by Landlord to any assignee or sublessee, or the failure of Landlord to assert its rights against any assignee or sublessee, and regardless of whether Landlord’s consent thereto is given or required to be given hereunder. In the event of a default by any assignee, sublessee or other successor of Tenant in the performance

of any of the terms or obligations of Tenant under this Lease, Landlord may proceed directly against Tenant without the necessity of exhausting remedies against any such assignee, sublessee or other successor. In addition, Tenant immediately and irrevocably assigns to Landlord, as security for Tenant’s obligations under this Lease, all rent from any subletting of all or a part of the Building as permitted under this Lease, and Landlord, as Tenant’s assignee and as attorney-in-fact for Tenant, or any receiver for Tenant appointed on Landlord’s application, may collect such rent and apply it toward Tenant’s obligations under this Lease; except that, until the occurrence of an act of default by Tenant, Tenant shall have the right to collect such rent and to retain all sublease profits (subject to the provisions of Section 13.2(c), below).

(b) Upon any assignment of Tenant’s interest in this Lease for which Landlord’s consent is required under Section 13.1 hereof, Tenant shall pay to Landlord, within ten (10) days after receipt thereof by Tenant from time to time, one-half (1/2) of all cash sums and other economic considerations received by Tenant in connection with or as a result of such assignment, after first deducting therefrom (i) the unamortized cost of any leasehold improvements previously made in the Building and paid for by Tenant, (ii) any costs incurred by Tenant for leasehold improvements (including, but not limited to, third-party architectural and space planning costs) in the Building in connection with such assignment, (iii) any real estate commissions and/or attorneys’ fees incurred by Tenant in connection with such assignment, and (iv) any economic consideration received by Tenant as bona fide, reasonable compensation for services rendered by Tenant to the assignee and/or personal property sold or leased by Tenant to the assignee.

(c) Upon any sublease of all or any portion of the Building for which Landlord’s consent is required under Section 13.1 hereof, Tenant shall pay to Landlord, within ten (10) days after receipt thereof by Tenant from time to time, one-half (1/2) of all cash sums and other economic considerations received by Tenant in connection with or as a result of such sublease, after first deducting therefrom (i) the rental due hereunder for the corresponding period, prorated (on the basis of the average per-square-foot cost paid by Tenant for the entire Building for the applicable period under this Lease) to reflect the size of the subleased portion of the Building, (ii) any costs incurred by Tenant for leasehold improvements in the subleased portion of the Building (including, but not limited to, third-party architectural and space planning costs) for the specific benefit of the sublessee in connection with such sublease, amortized over the term of the sublease, (iii) any real estate commissions and/or attorneys’ fees incurred by Tenant in connection with such sublease, amortized over the term of such sublease, (iv) the unamortized cost of any leasehold improvements previously made and paid for by Tenant with respect to the subleased portion of the Building, and (v) any economic consideration received by Tenant as bona fide, reasonable compensation for services rendered by Tenant to the sublessee and/or personal property sold or leased by Tenant to the sublessee.

14. &# 160; RIGHT OF ENTRY AND QUIET ENJOYMENT

14.1 Right Of Entry. Landlord and its authorized representatives shall have the right to enter the Building at any time during the term of this Lease during normal business hours and upon not less than twenty-four (24) hours prior notice, except in the case of emergency (in which event no notice shall be required and entry may be made at any time), for the purpose of inspecting and determining the condition of the Building or for any other proper purpose including, without limitation, to make repairs, replacements or improvements which Landlord may deem necessary, to show the Building to prospective purchasers, to show the Building to prospective tenants (but only during the final year of the term of this Lease), and to post notices of nonresponsibility. Landlord shall not be liable for inconvenience, annoyance, disturbance, loss of business, quiet enjoyment or other damage or loss to Tenant by reason of making any repairs or performing any work upon the Building or the Property or by reason of erecting or maintaining any protective barricades in connection with any such work, and the obligations of Tenant under this Lease shall not thereby be affected in any manner whatsoever, provided, however, Landlord shall use reasonable efforts to minimize the inconvenience to Tenant’s normal business operations caused thereby.

14.2 Quiet Enjoyment. Landlord covenants that Tenant, upon paying the rent and performing its obligations hereunder and subject to all the terms and conditions of this Lease, shall peacefully and quietly have, hold and enjoy the Building and the Property throughout the term of this Lease, or until this Lease is terminated as provided by this Lease.

15. &# 160; CASUALTY AND TAKING

15.1 Damage or Destruction.

(a) If the Building, or the Common Areas of the Property necessary for Tenant’s use and occupancy of the Building, are damaged or destroyed in whole or in part under circumstances in which (i) repair and restoration is permitted under applicable governmental laws, regulations and building codes then in effect and (ii) repair and restoration reasonably can be completed within a period of one (1) year (or, in the case of an occurrence during the last year of the term of this Lease, within a period of sixty (60) days) following the date of the occurrence, then Landlord, as to the Common Areas of the Property and the Building Shell (as such term is defined in the Existing Lease, but interpreted and applied with reference to the Building), and Tenant, as to the Tenant Improvements (as such term is defined in the Existing Lease, but interpreted and applied with reference to the Building) in the Building, shall commence and complete, with all due diligence and as promptly as is reasonably practicable under the conditions then existing, all such repair and restoration as may be required to return the affected portions of the Property to a condition comparable to that existing immediately prior to the occurrence. In the event of damage or destruction the repair of which is not permitted under applicable governmental laws, regulations and building codes then in effect, if such damage or destruction (despite being corrected to the extent then permitted under applicable governmental laws, regulations and building codes) would still materially impair Tenant’s ability to conduct its business in the Building, then either party may terminate this Lease as of the date of the occurrence by giving written notice to the other within thirty (30) days after the date of the occurrence; if neither party timely elects such termination, or if such damage or destruction does not materially impair Tenant’s ability to conduct its business in the Building, then this Lease shall continue in full force and effect, except that there shall be an equitable adjustment in monthly minimum rental and of Tenant’s Operating Cost Share of Operating Expenses, based upon the extent to which Tenant’s ability to conduct its business in the Building is impaired, and Landlord and Tenant respectively shall restore the Common Areas and Building Shell and the Tenant Improvements to a complete architectural whole and to a functional condition. In the event of damage or destruction which cannot reasonably be repaired within one (1) year (or, in the case of an occurrence during the last year of the term of this Lease, within a period of sixty (60) days) following the date of the occurrence, then either Landlord or Tenant, at its election, may terminate this Lease as of the date of the occurrence by giving written notice to the other within thirty (30) days after the date of the occurrence; if neither party timely elects such termination, then this Lease shall continue in full force and effect and Landlord and Tenant shall each repair and restore applicable portions of the Property in accordance with the first sentence of this Section 15.1.

(b) The respective obligations of Landlord and Tenant pursuant to Section 15.1(a) are subject to the following limitations:

(i) If the occurrence results from a peril which is required to be insured pursuant to Section 12.1(c) and (d) above, the obligations of either party shall not exceed the amount of insurance proceeds received from insurers (or, in the case of any failure to maintain required insurance, proceeds that reasonably would have been available if the required insurance had been maintained) by reason of such occurrence, plus the amount of the party’s permitted deductible (provided that each party shall be obligated to use its best efforts to recover any available proceeds from the insurance which it is required to maintain pursuant to the provisions of Section 12.1(c) or (d), as applicable), and, if such proceeds (including, in the case of a failure to maintain required insurance, any proceeds that reasonably would have been available) are insufficient, either party may terminate the Lease unless the other party promptly elects and agrees, in writing, to contribute the amount of the shortfall; and

(ii) If the occurrence results from a peril which is not required to be insured pursuant to Section 12.1(c) and (d) above and is not actally insured, Landlord shall be required to repair and restore the Building Shell and Common Areas to the extent necessary for Tenant’s continued use and occupancy of the Building, and Tenant shall be required to repair and restore the Tenant Improvements to the extent necessary for Tenant’s continued use and occupancy of the Building, provided that each party’s obligation to repair and restore shall not exceed an amount equal to five percent (5%) of the replacement cost of the Building Shell and Common Area improvements, as to Landlord, or five percent (5%) of the replacement cost of the Tenant Improvements, as to Tenant; if the replacement cost as to either party exceeds such amount, then the party whose limit has been exceeded may terminate this Lease unless the other party promptly elects and agrees, in writing, to contribute the amount of the shortfall.

(c) If this Lease is terminated pursuant to the foregoing provisions of this Section 15.1 following an occurrence which is a peril actually insured or required to be insured against pursuant to Section 12.1(c) and (d), Landlord and Tenant agree (and any Lender shall be asked to agree) that such insurance proceeds shall be allocated between Landlord and Tenant in a manner which fairly and reasonably reflects their respective ownership rights under this Lease, as of the termination or expiration of the term of this Lease, with respect to the improvements, fixtures, equipment and other items to which such insurance proceeds are attributable.

(d) From and after the date of an occurrence resulting in damage to or destruction of the Building or of the Common Areas necessary for Tenant’s use and occupancy of the Building, and continuing until repair and restoration thereof are completed, there shall be an equitable abatement of minimum rental and of Tenant’s Operating Cost Share of Operating Expenses based upon the degree to which Tenant’s ability to conduct its business in the Building is impaired.

15.2 Condemnation.

(a) If during the term of this Lease the Property or Improvements, or any substantial part of either, is taken by eminent domain or by reason of any public improvement or condemnation proceeding, or in any manner by exercise of the right of eminent domain (including any transfer in avoidance of an exercise of the power of eminent domain), or receives irreparable damage by reason of anything lawfully done under color of public or other authority, then (i) this Lease shall terminate as to the entire Building at Landlord’s election by written notice given to Tenant within sixty (60) days after the taking has occurred, and (ii) this Lease shall terminate as to the entire Building at Tenant’s election, by written notice given to Landlord within thirty (30) days after the nature and extent of the taking have been finally determined, if the portion of the Building taken is of such extent and nature as substantially to handicap, impede or permanently impair Tenant’s use of the balance of the Building. If Tenant elects to terminate this Lease, Tenant shall also notify Landlord of the date of termination, which date shall not be earlier than thirty (30) days nor later than ninety (90) days after Tenant has notified Landlord of Tenant’s election to terminate, except that this Lease shall terminate on the date of taking if such date falls on any date before the date of termination designated by Tenant. If neither party elects to terminate this Lease as hereinabove provided, this Lease shall continue in full force and effect (except that there shall be an equitable abatement of minimum rental and of Tenant’s Operating Cost Share of Operating Expenses based upon the degree to which Tenant’s ability to conduct its business in the Building is impaired), Landlord shall restore the Building Shell and Common Area improvements to a complete architectural whole and a functional condition and as nearly as reasonably possible to the condition existing before the taking, and Tenant shall restore the Tenant Improvements and Tenant’s other alterations, additions and improvements to a complete architectural whole and a functional condition and as nearly as reasonably possible to the condition existing before the taking. In connection with any such restoration, each party shall use its respective best efforts (including, without limitation, any necessary negotiation or intercession with its respective lender, if any) to ensure that any severance damages or other condemnation awards intended to provide compensation for rebuilding or restoration costs are promptly collected and made available to Landlord and Tenant in portions reasonably corresponding to the cost and scope of their respective restoration obligations, subject only to such payment controls as either party or its lender may reasonably require in order to ensure the proper application of such proceeds toward the restoration of the Improvements. Each party waives the provisions of Code of Civil Procedure Section 1265.130,

allowing either party to petition the Superior Court to terminate this Lease in the event of a partial condemnation of the Building or Property.

(b) The respective obligations of Landlord and Tenant pursuant to Section 15.2(a) are subject to the following limitations:

(i) Each party’s obligation to repair and restore shall not exceed, net of any condemnation awards or other proceeds available for and allocable to such restoration as contemplated in Section 15.2(a), an amount equal to five percent (5%) of the replacement cost of the Building Shell and Common Area improvements, as to Landlord, or five percent (5%) of the replacement cost of the Tenant Improvements, as to Tenant; if the replacement cost as to either party exceeds such amount, then the party whose limit has been exceeded may terminate this Lease unless the other party promptly elects and agrees, in writing, to contribute the amount of the shortfall; and

(ii) If this Lease is terminated pursuant to the foregoing provisions of this Section 15.2, or if this Lease remains in effect but any condemnation awards or other proceeds become available as compensation for the loss or destruction of any of the Improvements, then Landlord and Tenant agree (and any Lender shall be asked to agree) that such proceeds shall be allocated between Landlord and Tenant, respectively, in the respective proportions in which Landlord and Tenant would have shared, under Section 15.1(c), the proceeds of any insurance proceeds following loss or destruction of the applicable Improvements by an insured casualty.

15.3 Reservation Of Compensation. Landlord reserves, and Tenant waives and assigns to Landlord, all rights to any award or compensation for damage to the Improvements, the Property and the leasehold estate created hereby, accruing by reason of any taking in any public improvement, condemnation or eminent domain proceeding or in any other manner by exercise of the right of eminent domain or of anything lawfully done by public authority, except that (a) Tenant shall be entitled to any and all compensation or damages paid for or on account of Tenant’s moving expenses, trade fixtures and equipment and any leasehold improvements installed by Tenant in the Building at its own sole expense, but only to the extent Tenant would have been entitled to remove such items at the expiration of the term of this Lease and then only to the extent of the then remaining unamortized value of such improvements computed on a straight-line basis over the term of this Lease, and (b) any condemnation awards or proceeds described in Section 15.2(b)(ii) shall be allocated and disbursed in accordance with the provisions of Section 15.2(b)(ii), notwithstanding any contrary provisions of this Section 15.3.

15.4 Restoration Of Improvements. In connection with any repair or restoration of Improvements by either party following a casualty or taking as hereinabove set forth, the party responsible for such repair or restoration shall, to the extent possible, return such Improvements to a condition substantially equal to that which existed immediately prior to the casualty or taking. To the extent such party wishes to make material modifications to such Improvements, such modifications shall be subject to the prior written approval of the other party (not to be unreasonably withheld or delayed), except that no such approval shall be required for modifications that are required by applicable governmental authorities as a condition of the repair or restoration, unless such required modifications would impair or impede Tenant’s conduct of its business in the Building (in which case any such modifications in Landlord’s work shall require Tenant’s consent, not unreasonably withheld or delayed) or would materially and adversely affect the exterior appearance, the structural integrity or the mechanical or other operating systems of the Building (in which case any such modifications in Tenant’s work shall require Landlord’s consent, not unreasonably withheld or delayed).

16. &# 160; DEFAULT

16.1 Events Of Default. The occurrence of any of the following shall constitute an event of default on the part of Tenant:

(a) [Omitted.]

(b) Nonpayment. Failure to pay, when due, any amount payable to Landlord hereunder, such failure continuing for a period of five (5) business days after written notice of such failure; provided, however, that any such notice shall be in lieu of, and not in addition to, any notice required under California Code of Civil Procedure Section 1161 et seq., as amended from time to time;

(c) Other Obligations. Failure to perform any obligation, agreement or covenant under this Lease other than those matters specified in subsection (b) hereof, such failure continuing for thirty (30) days after written notice of such failure; provided, however, that if such failure is curable in nature but cannot reasonably be cured within such 30-day period, then Tenant shall not be in default if, and so long as, Tenant promptly (and in all events within such 30-day period) commences such cure and thereafter diligently pursues such cure to completion; and provided further, however, that any such notice shall be in lieu of, and not in addition to, any notice required under California Code of Civil Procedure Section 1161 et seq., as amended from time to time;

(d) General Assignment. A general assignment by Tenant for the benefit of creditors;

(e) Bankruptcy. The filing of any voluntary petition in bankruptcy by Tenant, or the filing of an involuntary petition by Tenant’s creditors, which involuntary petition remains undischarged for a period of thirty (30) days. In the event that under applicable law the trustee in bankruptcy or Tenant has the right to affirm this Lease and continue to perform the obligations of Tenant hereunder, such trustee or Tenant shall, in such time period as may be permitted by the bankruptcy court having jurisdiction, cure all defaults of Tenant hereunder outstanding as of the date of the affirmance of this Lease and provide to Landlord such adequate assurances as may be necessary to ensure Landlord of the continued performance of Tenant’s obligations under this Lease. Specifically, but without limiting the generality of the foregoing, such adequate assurances must include assurances that the Building continues to be operated only for the use permitted hereunder. The provisions hereof are to assure that the basic understandings between Landlord and Tenant with respect to Tenant’s use of the Property and the benefits to Landlord therefrom are preserved, consistent with the purpose and intent of applicable bankruptcy laws;

(f) Receivership. The employment of a receiver appointed by court order to take possession of substantially all of Tenant’s assets or the Building, if such receivership remains undissolved for a period of thirty (30) days;

(g) Attachment. The attachment, execution or other judicial seizure of all or substantially all of Tenant’s assets or the Building, if such attachment or other seizure remains undismissed or undischarged for a period of thirty (30) days after the levy thereof;

(h) Insolvency. The admission by Tenant in writing of its inability to pay its debts as they become due, the filing by Tenant of a petition seeking any reorganization or arrangement, composition, readjustment, liquidation, dissolution or similar relief under any present or future statute, law or regulation, the filing by Tenant of an answer admitting or failing timely to contest a material allegation of a petition filed against Tenant in any such proceeding or, if within thirty (30) days after the commencement of any proceeding against Tenant seeking any reorganization or arrangement, composition, readjustment, liquidation, dissolution or similar relief under any present or future statute, law or regulation, such proceeding shall not have been dismissed; or

(i) Cross-Default. Any default by Tenant under the Existing Lease, to the extent such default continues beyond any applicable cure periods provided in the Existing Lease and to the extent Landlord therefore has (and exercises concurrently with any termination of this Lease) a right to terminate the Existing Lease; provided, however, that the default event set forth in this Section 16.1(i) shall not apply with respect to any default by Tenant under the Existing Lease if, at the time of such default, any of the following conditions exists: (A) the holder of the landlord’s interest under the Existing Lease is neither the person or entity which is then the holder of the landlord’s interest under this Lease nor a person or entity which controls, is controlled by or is under common control with the person or entity which is then the holder of

the landlord’s interest under this Lease; (B) the holder of the tenant’s interest under the Existing Lease is neither the person or entity which is then the holder of the tenant’s interest under this Lease nor a person or entity which controls, is controlled by or is under common control with the person or entity which is then the holder of the tenant’s interest under this Lease; or (C) either the Property under this Lease or the property subject to the Existing Lease is subject to one or more outstanding mortgages or deeds of trust, and the other such property either is not subject to any outstanding mortgage or deed of trust, or is subject to one or more outstanding mortgages or deeds of trust and the beneficial interest under at least one such mortgage or deed of trust on such other property is held by a person or entity as lender which is neither the holder of the beneficial interest under any of the outstanding mortgages or deeds or trust on the first such property nor a person or entity which controls, is controlled by or is under common control with the holder of the beneficial interest under any of the outstanding mortgages or deeds of trust on the first such property.

16.2 Remedies Upon Tenant’s Default.

(a) Upon the occurrence of any event of default described in Section 16.1 hereof, Landlord, in addition to and without prejudice to any other rights or remedies it may have, shall have the immediate right to re-enter the Building or any part thereof and repossess the same, expelling and removing therefrom all persons and property (which property may be stored in a public warehouse or elsewhere at the cost and risk of and for the account of Tenant), using such force as may be necessary to do so (as to which Tenant hereby waives any claim for loss or damage that may thereby occur). In addition to or in lieu of such re-entry, and without prejudice to any other rights or remedies it may have, Landlord shall have the right either (i) to terminate this Lease and recover from Tenant all damages incurred by Landlord as a result of Tenant’s default, as hereinafter provided, or (ii) to continue this Lease in effect and recover rent and other charges and amounts as they become due.

(b) Even if Tenant has breached this Lease and abandoned the Building, this Lease shall continue in effect for so long as Landlord does not terminate Tenant’s right to possession under subsection (a) hereof and Landlord may enforce all of its rights and remedies under this Lease, including the right to recover rent as it becomes due, and Landlord, without terminating this Lease, may exercise all of the rights and remedies of a lessor under California Civil Code Section 1951.4 (lessor may continue lease in effect after lessee’s breach and abandonment and recover rent as it becomes due, if lessee has right to sublet or assign, subject only to reasonable limitations), or any successor Code section. Acts of maintenance, preservation or efforts to relet the Building or the appointment of a receiver upon application of Landlord to protect Landlord’s interests under this Lease shall not constitute a termination of Tenant’s right to possession.

(c) If Landlord terminates this Lease pursuant to this Section 16.2, Landlord shall have all of the rights and remedies of a landlord provided by Section 1951.2 of the Civil Code of the State of California, or any successor Code section, which remedies include Landlord’s right to recover from Tenant (i) the worth at the time of award of the unpaid rent and additional rent which had been earned at the time of termination, (ii) the worth at the time of award of the amount by which the unpaid rent and additional rent which would have been earned after termination until the time of award exceeds the amount of such rental loss that Tenant proves could have been reasonably avoided, (iii) the worth at the time of award of the amount by which the unpaid rent and additional rent for the balance of the term after the time of award exceeds the amount of such rental loss that Tenant proves could be reasonably avoided, and (iv) any other amount necessary to compensate Landlord for all the detriment proximately caused by Tenant’s failure to perform its obligations under this Lease or which in the ordinary course of things would be likely to result therefrom, including, but not limited to, the cost of recovering possession of the Building, expenses of reletting, including necessary repair, renovation and alteration of the Building, reasonable attorneys’ fees, and other reasonable costs. The “worth at the time of award” of the amounts referred to in clauses (i) and (ii) above shall be computed by allowing interest at ten percent (10%) per annum from the date such amounts accrued to Landlord. The “worth at the time of award” of the amounts referred to in clause (iii) above shall be computed by discounting such amount at one percentage point above the discount rate of the Federal Reserve Bank of San Francisco at the time of award.

16.3 Remedies Cumulative. All rights, privileges and elections or remedies of Landlord contained in this Article 16 are cumulative and not alternative to the extent permitted by law and except as otherwise provided herein.

17. &# 160; SUBORDINATION, ATTORNMENT AND SALE

17.1 Subordination To Mortgage. This Lease, and any sublease entered into by Tenant under the provisions of this Lease, shall be subject and subordinate to any ground lease, mortgage, deed of trust, sale/leaseback transaction or any other hypothecation for security now or hereafter placed upon the Building, the Property, or any of them, and the rights of any assignee of Landlord or of any ground lessor, mortgagee, trustee, beneficiary or leaseback lessor under any of the foregoing, and to any and all advances made on the security thereof and to all renewals, modifications, consolidations, replacements and extensions thereof; provided, however, that such subordination in the case of any future ground lease, mortgage, deed of trust, sale/leaseback transaction or any other hypothecation for security placed upon the Building, the Property, or any of them shall be conditioned on Tenant’s receipt from the ground lessor, mortgagee, trustee, beneficiary or leaseback lessor of a Non-Disturbance Agreement in a form reasonably acceptable to Tenant (i) confirming that so long as Tenant is not in material default hereunder beyond any applicable cure period (for which purpose the occurrence of any event of default under Section 16.1 hereof shall be deemed to be “material”), Tenant’s rights hereunder shall not be disturbed by such person or entity and (ii) agreeing that the benefit of such Non-Disturbance Agreement shall be transferable to any transferee under a Permitted Transfer and to any other assignee or subtenant that is acceptable to the ground lessor, mortgagee, trustee, beneficiary or leaseback lessor at the time of transfer. Moreover, Tenant’s obligations under this Lease shall be conditioned on Tenant’s receipt, within sixty (60) days after the date hereof (provided that Landlord shall have the right to extend such period for up to an additional thirty (30) days in order to continue pursuing receipt of the agreement required hereunder if not received within such initial 60-day period), from The Northwestern Mutual Life Insurance Company, the beneficiary under an existing deed of trust on the Property, of a Non-Disturbance Agreement in a form reasonably acceptable to Tenant confirming (i) that so long as Tenant is not in material default hereunder beyond any applicable cure period (for which purpose the occurrence of any event of default under Section 16.1 hereof shall be deemed to be “material”), Tenant’s rights hereunder shall not be disturbed by such person or entity and (ii) agreeing that the benefit of such Non-Disturbance Agreement shall be transferable to any transferee under a Permitted Transfer and to any other assignee or subtenant that is acceptable to the ground lessor, mortgagee, trustee, beneficiary or leaseback lessor at the time of transfer. If any mortgagee, trustee, beneficiary, ground lessor, sale/leaseback lessor or assignee elects to have this Lease be an encumbrance upon the Property prior to the lien of its mortgage, deed of trust, ground lease or leaseback lease or other security arrangement and gives notice thereof to Tenant, this Lease shall be deemed prior thereto, whether this Lease is dated prior or subsequent to the date thereof or the date of recording thereof. Tenant, and any sublessee, shall execute such documents as may reasonably be requested by any mortgagee, trustee, beneficiary, ground lessor, sale/leaseback lessor or assignee to evidence the subordination herein set forth, subject to the conditions set forth above, or to make this Lease prior to the lien of any mortgage, deed of trust, ground lease, leaseback lease or other security arrangement, as the case may be. Upon any default by Landlord in the performance of its obligations under any mortgage, deed of trust, ground lease, leaseback lease or assignment, Tenant (and any sublessee) shall, notwithstanding any subordination hereunder, attorn to the mortgagee, trustee, beneficiary, ground lessor, leaseback lessor or assignee thereunder upon demand and become the tenant of the successor in interest to Landlord, at the option of such successor in interest, and shall execute and deliver any instrument or instruments confirming the attornment herein provided for.

17.2 Sale Of Landlord’s Interest. Upon sale, transfer or assignment of Landlord’s entire interest in the Building and the Property, Landlord shall be relieved of its obligations hereunder with respect to liabilities accruing from and after the date of such sale, transfer or assignment.

17.3 Estoppel Certificates. Tenant or Landlord (the “responding party”), as applicable, shall at any time and from time to time, within ten (10) days after written request by

the other party (the “requesting party”), execute, acknowledge and deliver to the requesting party a certificate in writing stating: (i) that this Lease is unmodified and in full force and effect, or if there have been any modifications, that this Lease is in full force and effect as modified and stating the date and the nature of each modification; (ii) the date to which rental and all other sums payable hereunder have been paid; (iii) that the requesting party is not in default in the performance of any of its obligations under this Lease, that the certifying party has given no notice of default to the requesting party and that no event has occurred which, but for the expiration of the applicable time period, would constitute an event of default hereunder, or if the responding party alleges that any such default, notice or event has occurred, specifying the same in reasonable detail; and (iv) such other matters as may reasonably be requested by the requesting party or by any institutional lender, mortgagee, trustee, beneficiary, ground lessor, sale/leaseback lessor or prospective purchaser of the Property, or prospective sublessee or assignee of this Lease. Any such certificate provided under this Section 17.3 may be relied upon by any lender, mortgagee, trustee, beneficiary, assignee or successor in interest to the requesting party, by any prospective purchaser, by any purchaser on foreclosure or sale, by any grantee under a deed in lieu of foreclosure of any mortgage or deed of trust on the Property, by any subtenant or assignee, or by any other third party. Failure to execute and return within the required time any estoppel certificate requested hereunder, if such failure continues for five (5) days after a second written request by the requesting party for such estoppel certificate, shall be deemed to be an admission of the truth of the matters set forth in the form of certificate submitted to the responding party for execution.

17.4 Subordination to CC&R’s. This Lease, and any permitted sublease entered into by Tenant under the provisions of this Lease, and the interests in real property conveyed hereby and thereby shall be subject and subordinate to any declarations of covenants, conditions and restrictions affecting the Property from time to time, provided that the terms of such declarations are reasonable, do not materially impair Tenant’s ability to conduct the uses permitted hereunder on the Property, and do not discriminate against Tenant relative to other similarly situated tenants occupying portions of the property covered by such declaration(s). Moreover, this Lease, and any permitted sublease entered into by Tenant under the provisions of this Lease, and the interests in real property conveyed hereby and thereby shall also be subject and subordinate (a) to the Declaration of Covenants, Conditions and Restrictions for Pointe Grand Business Park dated November 4, 1991 and recorded on February 25, 1992 as Instrument No. 92025214, Official Records of San Mateo County, as amended from time to time (the “Master Declaration”), the provisions of which Master Declaration are an integral part of this Lease to the extent this sentence is applicable, (b) to the Declaration of Covenants, Conditions and Restrictions dated November 23, 1987 and recorded on November 24, 1987 as Instrument No. 87177987, Official Records of San Mateo County, which declaration imposes certain covenants, conditions and restrictions on the Pointe Grand Business Park, and (c) to the Environmental Restriction and Covenant (Pointe Grand) dated as of April 16, 1997 and recorded on April 16, 1997 as Instrument No. 97-043682, Official Records of San Mateo County, which declaration imposes certain covenants, conditions and restrictions on the Pointe Grand Business Park. Tenant agrees to execute, upon request by Landlord, any documents reasonably required from time to time to evidence such subordination.

17.5 Mortgagee Protection. If, following a default by Landlord under any mortgage, deed of trust, ground lease, leaseback lease or other security arrangement covering the Building, the Property, or any of them, the Buildings and/or the Property, as applicable, is acquired by the mortgagee, beneficiary, master lessor or other secured party, or by any other successor owner, pursuant to a foreclosure, trustee’s sale, sheriff’s sale, lease termination or other similar procedure (or deed in lieu thereof), then any such person or entity so acquiring the Building and/or the Property shall not be:

(a) liable for any act or omission of a prior landlord or owner of the Property (including, but not limited to, Landlord);

(b) subject to any offsets or defenses that Tenant may have against any prior landlord or owner of the Property (including, but not limited to, Landlord);

(c) bound by any rent or additional rent that Tenant may have paid in advance to any prior landlord or owner of the Property (including, but not limited to, Landlord) for a

period in excess of one month, or by any security deposit, cleaning deposit or other prepaid charge that Tenant may have paid in advance to any prior landlord or owner (including, but not limited to, Landlord), except to the extent such deposit or prepaid amount has been expressly turned over to or credited to the successor owner thus acquiring the Property;

(d) liable for any warranties or representations of any nature whatsoever, whether pursuant to this Lease or otherwise, by any prior landlord or owner of the Property (including, but not limited to, Landlord) with respect to the use, construction, zoning, compliance with laws, title, habitability, fitness for purpose or possession, or physical condition (including, without limitation, environmental matters) of the Property or the Building; or

(e) liable to Tenant in any amount beyond the interest of such mortgagee, beneficiary, master lessor or other secured party or successor owner in the Property as it exists from time to time, it being the intent of this provision that Tenant shall look solely to the interest of any such mortgagee, beneficiary, master lessor or other secured party or successor owner in the Property for the payment and discharge of the landlord’s obligations under this Lease and that such mortgagee, beneficiary, master lessor or other secured party or successor owner shall have no separate personal liability for any such obligations.

18. &# 160; SECURITY

18.1 Deposit. Within ten (10) days after mutual execution of this Lease, Tenant shall deposit with Landlord the sum of Two Hundred Fifty-Nine Thousand Ninety-Seven and No/100 Dollars ($259,097.00), which sum (the “Security Deposit”) shall be held by Landlord as security for the faithful performance of all of the terms, covenants, and conditions of this Lease to be kept and performed by Tenant during the term hereof. If Tenant defaults with respect to any provision of this Lease, including, without limitation, the provisions relating to the payment of rental and other sums due hereunder, Landlord shall have the right, but shall not be required, to use, apply or retain all or any part of the Security Deposit for the payment of rental or any other amount which Landlord may spend or become obligated to spend by reason of Tenant’s default or to compensate Landlord for any other loss or damage which Landlord may suffer by reason of Tenant’s default. If any portion of the Security Deposit is so used or applied, Tenant shall, within ten (10) days after written demand therefor, deposit cash with Landlord in an amount sufficient to restore the Security Deposit to its original amount and Tenant’s failure to do so shall be a material breach of this Lease. Landlord shall not be required to keep any deposit under this Section separate from Landlord’s general funds, and Tenant shall not be entitled to interest thereon. If Tenant fully and faithfully performs every provision of this Lease to be performed by it, the Security Deposit, or any balance thereof, shall be returned to Tenant or, at Landlord’s option, to the last assignee of Tenant’s interest hereunder, at the expiration of the term of this Lease and after Tenant has vacated the Property. In the event of termination of Landlord’s interest in this Lease, Landlord shall transfer all deposits then held by Landlord under this Section to Landlord’s successor in interest, whereupon Tenant agrees to release Landlord from all liability for the return of such deposit or the accounting thereof.

19. &# 160; MISCELLANEOUS

19.1 Notices. All notices, consents, waivers and other communications which this Lease requires or permits either party to give to the other shall be in writing and shall be deemed given when delivered personally (including delivery by private courier or express delivery service) or four (4) days after deposit in the United States mail, registered or certified mail, postage prepaid, addressed to the parties at their respective addresses as follows:

To Tenant: Exelixis, Inc.

170 Harbor Way

South San Francisco, CA 94080

Attn: George A. Scangos

with copy to: Cooley Godward LLP

One Maritime Plaza, 20^th Floor

San Francisco, CA 94111-3580

Attn: Anna B. Pope, Esq.

To Landlord: Britannia Pointe Grand Limited Partnership

1939 Harrison Street, Suite 715

Park Plaza Building

Oakland, CA 94612

Attn: T. J. Bristow

with copy to: Folger Levin & Kahn LLP

Embarcadero Center West

275 Battery Street, 23rd Floor

San Francisco, CA 94111

Attn: Donald E. Kelley, Jr.

and copy to: Slough Estates USA Inc.

33 West Monroe Street, Suite 2000

Chicago, IL 60603

Attn: William Rogalla

or to such other address as may be contained in a notice at least fifteen (15) days prior to the address change from either party to the other given pursuant to this Section. Rental payments and other sums required by this Lease to be paid by Tenant shall be delivered to Landlord at Landlord’s address provided in this Section, or to such other address as Landlord may from time to time specify in writing to Tenant, and shall be deemed to be paid only upon actual receipt.

19.2 Successors And Assigns. The obligations of this Lease shall run with the land, and this Lease shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns, except that the original Landlord named herein and each successive Landlord under this Lease shall be liable only for obligations accruing during the period of its ownership of the Property, and any liability for obligations accruing after termination of such ownership shall terminate as of the date of such termination of ownership and shall pass to the successor lessor.

19.3 No Waiver. The failure of Landlord to seek redress for violation, or to insist upon the strict performance, of any covenant or condition of this Lease shall not be deemed a waiver of such violation, or prevent a subsequent act which would originally have constituted a violation from having all the force and effect of an original violation.

19.4 Severability. If any provision of this Lease or the application thereof is held to be invalid or unenforceable, the remainder of this Lease or the application of such provision to persons or circumstances other than those as to which it is invalid or unenforceable shall not be affected thereby, and each of the provisions of this Lease shall be valid and enforceable, unless enforcement of this Lease as so invalidated would be unreasonable or grossly inequitable under all the circumstances or would materially frustrate the purposes of this Lease.

19.5 Litigation Between Parties. In the event of any litigation or other dispute resolution proceedings between the parties hereto arising out of or in connection with this Lease, the prevailing party shall be reimbursed for all reasonable costs, including, but not limited to, reasonable accountants’ fees and attorneys’ fees, incurred in connection with such proceedings (including, but not limited to, any appellate proceedings relating thereto) or in connection with the enforcement of any judgment or award rendered in such proceedings. “Prevailing party” within the meaning of this Section shall include, without limitation, a party who dismisses an action for recovery hereunder in exchange for payment of the sums allegedly due, performance of covenants allegedly breached or consideration substantially equal to the relief sought in the action.

19.6 Surrender. A voluntary or other surrender of this Lease by Tenant, or a mutual termination thereof between Landlord and Tenant, shall not result in a merger but shall, at the option of Landlord, operate either as an assignment to Landlord of any and all existing subleases and subtenancies, or a termination of all or any existing subleases and subtenancies.

This provision shall be contained in any and all assignments or subleases made pursuant to this Lease.

19.7 Interpretation. The provisions of this Lease shall be construed as a whole, according to their common meaning, and not strictly for or against Landlord or Tenant. The captions preceding the text of each Section and subsection hereof are included only for convenience of reference and shall be disregarded in the construction or interpretation of this Lease.

19.8 Entire Agreement. This written Lease, together with the exhibits hereto, contains all the representations and the entire understanding between the parties hereto with respect to the subject matter hereof. Any prior correspondence, memoranda or agreements are replaced in total by this Lease and the exhibits hereto. This Lease may be modified only by an agreement in writing signed by each of the parties.

19.9 Governing Law. This Lease and all exhibits hereto shall be construed and interpreted in accordance with and be governed by all the provisions of the laws of the State of California.

19.10 No Partnership. The relationship between Landlord and Tenant is solely that of a lessor and lessee. Nothing contained in this Lease shall be construed as creating any type or manner of partnership, joint venture or joint enterprise with or between Landlord and Tenant.

19.11 Financial Information. From time to time Tenant shall promptly provide directly to prospective lenders and purchasers of the Property designated by Landlord such financial information pertaining to the financial status of Tenant as Landlord may reasonably request; provided, Tenant shall be permitted to provide such financial information in a manner which Tenant deems reasonably necessary to protect the confidentiality of such information. In addition, from time to time, Tenant shall provide Landlord with such financial information pertaining to the financial status of Tenant as Landlord may reasonably request. Landlord agrees that all financial information supplied to Landlord by Tenant shall be treated as confidential material, and shall not be disseminated to any party or entity (including any entity affiliated with Landlord) without Tenant’s prior written consent, except that Landlord shall be entitled to provide such information, subject to reasonable precautions to protect the confidential nature thereof, (i) to Landlord’s partners and professional advisors, solely to use in connection with Landlord’s execution and enforcement of this Lease, and (ii) to prospective lenders and/or purchasers of the Property, solely for use in connection with their bona fide consideration of a proposed financing or purchase of the Property, provided that such prospective lenders and/or purchasers are not then engaged in businesses directly competitive with the business then being conducted by Tenant. For purposes of this Section, without limiting the generality of the obligations provided herein, it shall be deemed reasonable for Landlord to request copies of Tenant’s most recent audited annual financial statements, or, if audited statements have not been prepared, unaudited financial statements for Tenant’s most recent fiscal year, accompanied by a certificate of Tenant’s chief financial officer that such financial statements fairly present Tenant’s financial condition as of the date(s) indicated. Notwithstanding any other provisions of this Section 19.11, during any period in which Tenant has outstanding a class of publicly traded securities and is filing with the Securities and Exchange Commission, on a regular basis, Forms 10Q and 10K and any other periodic filings required under the Securities Exchange Act of 1934, as amended, it shall constitute sufficient compliance under this Section 19.11 for Tenant to furnish Landlord with copies of such periodic filings substantially concurrently with the filing thereof with the Securities and Exchange Commission.

Landlord and Tenant recognize the need of Tenant to maintain the confidentiality of information regarding its financial status and the need of Landlord to be informed of, and to provide to prospective lenders and purchasers of the Property financial information pertaining to, Tenant’s financial status. Landlord and Tenant agree to cooperate with each other in achieving these needs within the context of the obligations set forth in this Section.

19.12 Costs. If Tenant requests the consent of Landlord under any provision of this Lease for any act that Tenant proposes to do hereunder, including, without limitation, assignment or subletting of the Building or any portion thereof, Tenant shall, as a condition to

doing any such act and the receipt of such consent, reimburse Landlord promptly for any and all reasonable costs and expenses incurred by Landlord in connection therewith, including, without limitation, reasonable attorneys’ fees, up to a maximum of $2,500.00 per request.

19.13 Time. Time is of the essence of this Lease, and of every term and condition hereof.

19.14 Rules And Regulations. Tenant shall observe, comply with and obey, and shall cause its employees, agents and, to the best of Tenant’s ability, invitees to observe, comply with and obey such rules and regulations as Landlord may reasonably promulgate from time to time for the safety, care, cleanliness, order and use of the Improvements, the Building and the Property.

19.15 Brokers. Landlord agrees to pay a brokerage commission to Tenant’s broker, Cornish & Carey Commercial, in connection with the consummation of this Lease in accordance with a separate agreement. Each party represents and warrants that no other broker participated in the consummation of this Lease and agrees to indemnify, defend and hold the other party harmless against any liability, cost or expense, including, without limitation, reasonable attorneys’ fees, arising out of any claims for brokerage commissions or other similar compensation in connection with any conversations, prior negotiations or other dealings by the indemnifying party with any other broker.

19.16 Memorandum Of Lease. At any time during the term of this Lease, either party, at its sole expense, shall be entitled to record a memorandum of this Lease and, if either party so elects, both parties agree to cooperate in the preparation, execution, acknowledgement and recordation of such document in reasonable form.

19.17 Corporate Authority. Each of the persons signing this Lease on behalf of Tenant warrants that he or she is fully authorized to do so and, by jointly so signing, to bind Tenant.

19.18 Execution and Delivery. This Lease may be executed in one or more counterparts and by separate parties on separate counterparts, but each such counterpart shall constitute an original and all such counterparts together shall constitute one and the same instrument.

19.19 Survival. Without limiting survival provisions which would otherwise be implied or construed under applicable law, the provisions of Sections 2.5, 7.4, 9.2, 9.3, 9.4, 11.6, 12.6 and 19.5 hereof shall survive the termination of this Lease with respect to matters occurring prior to the expiration of this Lease.

19.20 Parking. Landlord and Tenant agree that the Common Areas, taken as a whole, shall include parking in amounts sufficient to satisfy the minimum parking requirements of the City of South San Francisco applicable to the Property and the Britannia Pointe Grand Business Park from time to time. Landlord represents to Tenant that under the most current drawings at this date for the complete build-out of the Property and the Britannia Pointe Grand Business Park, the overall rate of parking is approximately 3.00 spaces for each 1,000 square feet of space in the various buildings presently existing or presently contemplated for construction on the Property and in the remainder of the Britannia Pointe Grand Business Park.

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IN WITNESS WHEREOF, the parties hereto have executed this Lease as of the day and year first set forth above

“Landlord”			“Tenant”

BRITANNIA POINTE GRAND LIMITED			EXELIXIS, INC., a Delaware corporation
PARTNERSHIP, a Delaware limited
partnership			By:	/s/ George A. Scangos

By:	BRITANNIA POINTE GRAND,			George A. Scangos
	LLC, a California limited liability			President and CEO
	company, General Partner

	By:	/s/ T.J. Bristow	By:	/s/ Glen Y. Sato
		T. J. Bristow
		Its Manager, President and	Its:	CFO
		Chief Financial Officer