Exhibit 10.1

EXECUTION COPY

SECURITIES PURCHASE AGREEMENT

This Securities Purchase Agreement (this “Agreement”) is dated as of September 15, 2009, by and among Helicos BioSciences Corporation, a Delaware corporation (the “Company”), and the several purchasers identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”).

RECITALS

A.            The Company and each Purchaser is executing and delivering this Agreement in reliance upon the exemption from securities registration afforded by Section 4(2) of the Securities Act of 1933, as amended (the “Securities Act”), and Rule 506 of Regulation D (“Regulation D”) as promulgated by the United States Securities and Exchange Commission (the “Commission”) under the Securities Act.

B.            Each Purchaser, severally and not jointly, wishes to purchase, and the Company wishes to sell, upon the terms and conditions stated in this Agreement, (i) that aggregate number of shares of common stock, par value $0.001 per share (the “Common Stock”), of the Company, set forth below such Purchaser’s name on the signature page of this Agreement (which aggregate amount for all Purchasers together shall be 4,311,280 shares of Common Stock and shall be collectively referred to herein as the “Shares”) and (ii) warrants, in substantially the form attached hereto as Exhibit A (the “Warrants”), to acquire up to that number of additional shares of Common Stock equal to fifty percent (50%) (or sixty-six and two-tenths percent (66.2%) for the Inside Investors) of the number of Shares purchased by such Purchaser (rounded up to the nearest whole share) (the shares of Common Stock issuable upon exercise of or otherwise pursuant to the Warrants collectively are referred to herein as the “Warrant Shares”).

C.            The Shares, the Warrants and the Warrant Shares collectively are referred to herein as the “Securities”.

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this Agreement, and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Company and the Purchasers hereby agree as follows:

ARTICLE I

DEFINITIONS

1.1           Definitions.  In addition to the terms defined elsewhere in this Agreement, for all purposes of this Agreement, the following terms shall have the meanings indicated in this Section 1.1:

“Action” means any action, suit, inquiry, notice of violation, proceeding (including any partial proceeding such as a deposition) or investigation pending or, to the Company’s Knowledge, threatened in writing against the Company, any Subsidiary or any of their respective properties or any officer, director or employee of the Company or any Subsidiary acting in his or her capacity as an officer, director or employee before or by any federal, state, county, local or foreign court, arbitrator, governmental or administrative agency, regulatory authority, stock market, stock exchange or trading facility.

“Affiliate” means, with respect to any Person, any other Person that, directly or indirectly through one or more intermediaries, Controls, is controlled by or is under common control with such Person, as such terms are used in and construed under Rule 405 under the Securities Act.  With respect to a Purchaser, any

investment fund or managed account that is managed on a discretionary basis by the same investment manager as such Purchaser will be deemed to be an Affiliate of such Purchaser.

“Agreement” shall have the meaning ascribed to such term in the Preamble.

“Business Day” means a day, other than a Saturday or Sunday, on which banks in New York City are open for the general transaction of business.

“Closing” means the closing of the purchase and sale of the Shares and the Warrants pursuant to this Agreement.

“Closing Date” means the Trading Day when all of the Transaction Documents have been executed and delivered by the applicable parties thereto, and all of the conditions set forth in Sections 2.1, 2.2, 5.1 and 5.2 hereof are satisfied, or such other date as the parties may agree.

“Commission” has the meaning set forth in the Recitals.

“Common Stock” has the meaning set forth in the Recitals, and also includes any securities into which the Common Stock may hereafter be reclassified or changed.

“Common Stock Equivalents” means any securities of the Company or any Subsidiary which would entitle the holder thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, rights, options, warrants or other instrument that is at any time convertible into or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock or other securities that entitle the holder to receive, directly or indirectly, Common Stock.

“Company Counsel” means Goodwin Procter LLP.

“Company Deliverables” has the meaning set forth in Section 2.2(a).

“Company’s Knowledge” means with respect to any statement made to the knowledge of the Company, that the statement is based upon the actual knowledge of the executive officers of the Company having responsibility for the matter or matters that are the subject of the statement.

“Control” (including the terms “controls”, “controlling”, “controlled by” or “under common control with”) means the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person, whether through the ownership of voting securities, by contract or otherwise.

“Disclosure Materials” has the meaning set forth in Section 3.1(h).

“Environmental Laws” has the meaning set forth in Section 3.1(l).

“Exchange Act” means the Securities Exchange Act of 1934, as amended, or any successor statute, and the rules and regulations promulgated thereunder.

“GAAP” means U.S. generally accepted accounting principles, as applied by the Company.

“Indemnified Person” has the meaning set forth in Section 4.7(b).

“Inside Investors” means (i) each of Atlas Venture, Flagship Ventures, Highland Capital Partners and Versant Ventures and their affiliated investment funds that are Purchasers hereunder (collectively, the “VC Investors”) and (ii) each of the executive officers and directors of the Company that are Purchasers hereunder.

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“Intellectual Property” has the meaning set forth in Section 3.1(r).

“Lien” means any lien, charge, claim, encumbrance, security interest, right of first refusal, preemptive right or other restrictions of any kind.

“Material Adverse Effect” means any of (i) a material and adverse effect on the legality, validity or enforceability of any Transaction Document, (ii) a material and adverse effect on the results of operations, assets, business, prospects or financial condition of the Company and the Subsidiaries, or (iii) any adverse impairment to the Company’s ability to perform in any material respect on a timely basis its obligations under any Transaction Document.

“Material Contract” means any contract of the Company that was filed or required to be filed as an exhibit to the SEC Reports pursuant to Item 601(b)(4) or Item 601(b)(10) of Regulation S-K.

“Material Permits” has the meaning set forth in Section 3.1(p).

“Outside Date” means the fifteenth day following the date of this Agreement; provided that if such day is not a Business Day, the first day following such day that is a Business Day.

“Person” means an individual, corporation, partnership, limited liability company, trust, business trust, association, joint stock company, joint venture, sole proprietorship, unincorporated organization, governmental authority or any other form of entity not specifically listed herein.

“Press Release” has the meaning set forth in Section 4.6.

“Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted for trading, which, as of the date of this Agreement and the Closing Date, shall be the NASDAQ Global Market.

“Proceeding” means an action, claim, suit, investigation or proceeding (including, without limitation, an investigation or partial proceeding, such as a deposition), whether commenced or threatened.

“Purchase Price” means $2.24 per unit (or $2.57275 per unit for the Inside Investors).

“Purchaser Deliverables” has the meaning set forth in Section 2.2(b).

“Purchaser Party” has the meaning set forth in Section 4.7(a).

“Registration Rights Agreement” means the registration rights agreement dated the date hereof and attached hereto as Exhibit D.

“Registration Statement” means a registration statement covering the resale by the Purchasers of the Shares and Warrant Shares.

“Required Approvals” has the meaning set forth in Section 3.1(e).

“Rule 144” means Rule 144 promulgated by the Commission pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the Commission having substantially the same effect as such Rule.

“SEC Reports” has the meaning set forth in Section 3.1(h).

“Secretary’s Certificate” has the meaning set forth in Section 2.2(a)(v).

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“Securities Act” means the Securities Act of 1933, as amended.

“Short Sales” means all “short sales” as defined in Rule 200 of Regulation SHO under the Exchange Act (but shall not be deemed to include the location and/or reservation of borrowable shares of Common Stock).

“Subscription Amount” means with respect to each Purchaser, the aggregate amount to be paid for the Shares and the related Warrants purchased hereunder as indicated on such Purchaser’s signature page to this Agreement next to the heading “Aggregate Purchase Price (Subscription Amount)”.

“Subsidiary” means any entity in which the Company, directly or indirectly, owns sufficient capital stock or holds a sufficient equity or similar interest such that it is consolidated with the Company in the financial statements of the Company.

“Trading Affiliate(s)” has the meaning set forth in Section 3.2(h).

“Trading Day” means (i) a day on which the Common Stock is listed or quoted and traded on its Principal Trading Market (other than the OTC Bulletin Board), or (ii) if the Common Stock is not listed on a Trading Market (other than the OTC Bulletin Board), a day on which the Common Stock is traded in the over-the-counter market, as reported by the OTC Bulletin Board, or (iii) if the Common Stock is not quoted on any Trading Market, a day on which the Common Stock is quoted in the over-the-counter market as reported in the “pink sheets” by Pink Sheets LLC (or any similar organization or agency succeeding to its functions of reporting prices); provided , that in the event that the Common Stock is not listed or quoted as set forth in (i), (ii) and (iii) hereof, then Trading Day shall mean a Business Day.

“Trading Market” means whichever of the New York Stock Exchange, the American Stock Exchange, the NASDAQ Global Select Market, the NASDAQ Global Market, the NASDAQ Capital Market or the OTC Bulletin Board on which the Common Stock is listed or quoted for trading on the date in question.

“Transaction Documents” means this Agreement, the schedules and exhibits attached hereto, the Warrants, the Registration Rights Agreement and any other documents or agreements executed in connection with the transactions contemplated hereunder.

“Transfer Agent” means Computershare Shareholder Services, Inc., or any successor transfer agent for the Company.

ARTICLE II

PURCHASE AND SALE

2.1           Closing.

(a)           Amount.  Subject to the terms and conditions set forth in this Agreement, at the Closing the Company shall issue and sell to each Purchaser, and each Purchaser shall, severally and not jointly, purchase from the Company, such number of Shares equal to the quotient resulting from dividing (i) the Subscription Amount for such Purchaser by (ii) the Purchase Price, rounded up to the nearest whole Share.  In addition, each Purchaser shall receive a Warrant to purchase a number of Warrant Shares equal to fifty percent (50%) (or sixty-six and two-tenths percent (66.2%) for the Inside Investors) of the number of Shares, rounded up to the nearest whole Warrant Share, purchased by such Purchaser, as indicated below such Purchaser’s name on the signature page to this Agreement. The Warrants shall have an exercise price equal to $2.61 per Warrant Share, subject to applicable adjustments.

(b)           Closing.  The Closing of the purchase and sale of the Shares and Warrants shall take place at the offices of Goodwin Procter LLP, Exchange Place, 53 State Street, Boston, Massachusetts, on the

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Closing Date or at such other locations or remotely by facsimile transmission or other electronic means as the parties may mutually agree.

(c)           Form of Payment.  Except as may otherwise be agreed to among the Company and one or more of the Purchasers, on or prior to the Business Day immediately prior to the Closing Date, each Purchaser shall wire its Subscription Amount, in United States dollars and in immediately available funds, to a non-interest bearing escrow account established by the Company as set forth on Exhibit C hereto.  On the Closing Date, the Company shall irrevocably instruct the Transfer Agent to deliver to each Purchaser one or more stock certificates, free and clear of all restrictive and other legends (except as expressly provided in Section 4.1(b) hereof), evidencing the number of Shares such Purchaser is purchasing as is set forth on such Purchaser’s signature page to this Agreement next to the heading “Number of Shares to be Acquired”, within three (3) Business Days after the Closing.

2.2           Closing Deliveries.

(a)           On or prior to the Closing, the Company shall issue, deliver or cause to be delivered to each Purchaser the following (the “Company Deliverables”):

(i)            this Agreement, duly executed by the Company;

(ii)           facsimile copies of one or more stock certificates, free and clear of all restrictive and other legends (except as provided in Section 4.1(b) hereof), evidencing the Shares subscribed for by Purchaser hereunder, registered in the name of such Purchaser as set forth on the Stock Certificate Questionnaire included as Exhibit B-2 hereto (the “Stock Certificates”), with the original Stock Certificates sent to the Purchasers within three (3) Business Days of Closing;

(iii)          a Warrant, executed by the Company and registered in the name of such Purchaser as set forth on the Stock Certificate Questionnaire included as Exhibit B-2 hereto, pursuant to which such Purchaser shall have the right to acquire such number of Warrant Shares equal to fifty percent (50%) (or sixty-six and two-tenths percent (66.2%) for the Inside Investors) of the number of Shares issuable to such Purchaser, rounded up to the nearest whole share, on the terms set forth therein;

(iv)          a legal opinion of Company Counsel, dated as of the Closing Date, executed by such counsel and addressed to the Purchasers;

(v)           a certificate of the Secretary of the Company (the “Secretary’s Certificate”), dated as of the Closing Date, (a) certifying the resolutions adopted by the Board of Directors of the Company or a duly authorized committee thereof approving the transactions contemplated by this Agreement and the other Transaction Documents and the issuance of the Securities, (b) certifying the current versions of the certificate or articles of incorporation, as amended, and by-laws of the Company and (c) certifying as to the signatures and authority of persons signing the Transaction Documents and related documents on behalf of the Company;

(vi)          the Compliance Certificate referred to in Section 5.1(g);

(vii)         a certificate evidencing the formation and good standing of the Company in its jurisdiction of formation issued by the Secretary of State (or comparable office) of such jurisdiction, as of a date within five (5) Business Days of the Closing Date;

(viii)        a certificate evidencing the Company’s qualification as a foreign corporation and good standing issued by the Commonwealth of Massachusetts, as of a date within ten (10) Business Days of the Closing Date;

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(ix)           a certified copy of the Certificate of Incorporation, as certified by the Secretary of State of the State of Delaware, as of a date within ten (10) Business Days of the Closing Date; and

(x)            a fully executed Registration Rights Agreement.

(b)           On or prior to the Closing, each Purchaser shall deliver or cause to be delivered to the Company the following (the “Purchaser Deliverables”):

(i)            this Agreement, duly executed by such Purchaser;

(ii)           its Subscription Amount, in United States dollars and in immediately available funds, in the amount set forth as the “Purchase Price” indicated below such Purchaser’s name on the applicable signature page hereto under the heading “Aggregate Purchase Price (Subscription Amount)” by wire transfer to the escrow account set forth on Exhibit C attached hereto; and

(iii)          a fully completed and duly executed Accredited Investor Questionnaire, reasonably satisfactory to the Company, and Stock Certificate Questionnaire in the forms attached hereto as Exhibits B-1 and B-2 , respectively.

ARTICLE III

REPRESENTATIONS AND WARRANTIES

3.1           Representations and Warranties of the Company.  The Company hereby represents and warrants as of the date hereof and the Closing Date (except for the representations and warranties that speak as of a specific date, which shall be made as of such date), to each of the Purchasers that the following representations and warranties are true and complete, except as set forth in the Schedules delivered herewith or disclosed in the SEC Reports.  The Schedules shall be arranged in sections corresponding to the lettered subsections contained in this Section 3.1, and the disclosures in any subsection of the schedules shall qualify other subsections in this Section 3.1 to the extent it is reasonably apparent from a reading of the disclosure that such disclosure is applicable to such other subsections.

(a)           Subsidiaries.  The Company has no direct or indirect Subsidiaries other than those listed in Schedule 3.1(a) hereto.  Except as disclosed in Schedule 3.1(a) hereto, the Company owns, directly or indirectly, all of the capital stock or comparable equity interests of each Subsidiary free and clear of any and all Liens which would reasonably be expected to have a Material Adverse Effect, and all the issued and outstanding shares of capital stock or comparable equity interest of each Subsidiary are validly issued and are fully paid, non-assessable and free of preemptive and similar rights to subscribe for or purchase securities.

(b)           Organization and Qualification.  The Company and each of its Subsidiaries is an entity duly incorporated or otherwise organized, validly existing and in good standing under the laws of the jurisdiction of its incorporation or organization (as applicable), with the requisite corporate power and authority to own or lease and use its properties and assets and to carry on its business as currently conducted.  Neither the Company nor any Subsidiary is in violation of any of the provisions of its respective certificate or articles of incorporation, bylaws or other organizational or charter documents.  The Company and each of its Subsidiaries is duly qualified to conduct business and is in good standing as a foreign corporation or other entity in each jurisdiction in which the nature of the business conducted or property owned by it makes such qualification necessary, except where the failure to be so qualified or in good standing, as the case may be, would not have a Material Adverse Effect.

(c)           Authorization; Enforcement; Validity.  The Company has the requisite corporate power and authority to enter into and to consummate the transactions contemplated by each of the

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Transaction Documents to which it is a party and otherwise to carry out its obligations hereunder and thereunder.  The Company’s execution and delivery of each of the Transaction Documents to which it is a party and the consummation by it of the transactions contemplated hereby and thereby (including, but not limited to, the sale and delivery of the Shares and the Warrants and the reservation for issuance and the  subsequent issuance of the Warrant Shares upon exercise of the Warrants) have been duly authorized by all necessary corporate action on the part of the Company, and no further corporate action is required by the Company, its Board of Directors or its stockholders in connection therewith other than in connection with the Required Approvals.  Each of the Transaction Documents to which it is a party has been (or upon delivery will have been) duly executed by the Company and is, or when delivered in accordance with the terms hereof, will constitute the legal, valid and binding obligation of the Company enforceable against the Company in accordance with its terms, except (i) as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally the enforcement of, creditors’ rights and remedies or by other equitable principles of general application, (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies and (iii) insofar as indemnification and contribution provisions may be limited by applicable law.

(d)           No Conflicts.  The execution, delivery and performance by the Company of the Transaction Documents to which it is a party and the consummation by the Company of the transactions contemplated hereby or thereby (including, without limitation, the issuance of the Shares and Warrants and the reservation for issuance and issuance of the Warrant Shares) do not and will not (i) conflict with or violate any provisions of the Company’s or any Subsidiary’s certificate or articles of incorporation, bylaws or otherwise result in a violation of the organizational documents of the Company, (ii) conflict with, or constitute a default (or an event that with notice or lapse of time or both would result in a default) under, result in the creation of any Lien upon any of the properties or assets of the Company or give to others any rights of termination, amendment, acceleration or cancellation (with or without notice, lapse of time or both) of, any Material Contract, or (iii) subject to the Required Approvals, conflict with or result in a violation of any law, rule, regulation, order, judgment, injunction, decree or other restriction of any court or governmental authority to which the Company is subject (including federal and state securities laws and regulations and the rules and regulations, assuming the correctness of the representations and warranties made by the Purchasers herein, of any self-regulatory organization to which the Company or its securities are subject, including all applicable Trading Markets), or by which any property or asset of the Company is bound or affected, except in the case of clauses (ii) and (iii) such as would not, individually or in the aggregate, have a Material Adverse Effect.

(e)           Filings, Consents and Approvals.  Neither the Company nor any of its Subsidiaries is required to obtain any consent, waiver, authorization or order of, give any notice to, or make any filing or registration with, any court or other federal, state, local or other governmental authority or other Person in connection with the execution, delivery and performance by the Company of the Transaction Documents (including, without limitation, the issuance of the Securities), other than (i) the filing with the Commission of one or more Registration Statements, (ii) filings required by applicable state securities laws, (iii) the filing of a Notice of Sale of Securities on Form D with the Commission under Regulation D of the Securities Act, (iv) the filing of any requisite notices and/or application(s) to the Principal Trading Market for the issuance and sale of the Common Stock and the Warrants and the listing of the Common Stock for trading or quotation, as the case may be, thereon in the time and manner required thereby, (v) the filings required in accordance with Section 4.6 of this Agreement and (vi) those that have been made or obtained prior to the date of this Agreement (collectively, the “Required Approvals”).

(f)            Issuance of the Securities.  The Shares have been duly authorized and, when issued and paid for in accordance with the terms of the Transaction Documents, will be duly and validly issued, fully paid and nonassessable and free and clear of all Liens, other than restrictions on transfer provided for in the Transaction Documents or imposed by applicable securities laws, and shall not be subject to preemptive or similar rights.  The Warrants have been duly authorized and, when issued and paid for in accordance with

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the terms of the Transaction Documents, will be duly and validly issued, free and clear of all Liens, other than restrictions on transfer provided for in the Transaction Documents or imposed by applicable securities laws, and shall not be subject to preemptive or similar rights of stockholders. The Warrant Shares issuable upon exercise of the Warrants have been duly authorized and, when issued and paid for in accordance with the terms of the Transaction Documents and the Warrants will be duly and validly issued, fully paid and nonassessable, free and clear of all Liens, other than restrictions on transfer provided for in the Transaction Documents or imposed by applicable securities laws, and shall not be subject to preemptive or similar rights of stockholders.  Assuming the accuracy of the representations and warranties of the Purchasers in this Agreement, the Shares and the Warrant Shares will be issued in compliance with all applicable federal and state securities laws.  As of the Closing Date, the Company shall have reserved from its duly authorized capital stock the number of shares of Common Stock issuable upon exercise of the Warrants (without taking into account any limitations on the exercise of the Warrants set forth in the Warrants).  The Company shall, so long as any of the Warrants are outstanding, take all action necessary to reserve and keep available out of its authorized and unissued capital stock, solely for the purpose of effecting the exercise of the Warrants, 100% of the number of shares of Common Stock issuable upon exercise of the Warrants (without taking into account any limitations on the exercise of the Warrants set forth in the Warrants).

(g)           Capitalization.  The number of shares and type of all authorized, issued and outstanding capital stock, options and other securities of the Company (whether or not presently convertible into or exercisable or exchangeable for shares of capital stock of the Company) has been set forth in the SEC Reports and, except as otherwise provided in Schedule 3.1(g) hereto, has changed since the date of such SEC Reports only due to stock grants or other equity awards or stock option and warrant exercises that do not, individually or in the aggregate, have a material effect on the issued and outstanding capital stock, options and other securities.  All of the outstanding shares of capital stock of the Company are duly authorized, validly issued, fully paid and non-assessable, have been issued in compliance in all material respects with all applicable federal and state securities laws, and none of such outstanding shares was issued in violation of any preemptive rights or similar rights to subscribe for or purchase any capital stock of the Company.  The Company has no liabilities or obligations required to be disclosed in the SEC Reports but not so disclosed in the SEC Reports, other than those incurred in the ordinary course of the Company’s business and which, individually or in the aggregate, do not or would not have a Material Adverse Effect.  The issuance and sale of the Shares and Warrants will not obligate the Company to issue shares of Common Stock or other securities to any Person (other than the Purchasers) and will not result in a right of any holder of Company securities to adjust the exercise, conversion, exchange or reset price under any of such securities.

(h)           SEC Reports; Disclosure Materials.  The Company has filed all reports, schedules, forms, statements and other documents required to be filed by it under the Exchange Act, including pursuant to Section 13(a) or 15(d) thereof, for the twelve months preceding the date hereof (or such shorter period as the Company was required by law or regulation to file such material) (the foregoing materials, including the exhibits thereto and documents incorporated by reference therein, being collectively referred to herein as the “SEC Reports” and together with this Agreement and the Schedules to this Agreement, the “Disclosure Materials”), on a timely basis or has received a valid extension of such time of filing and has filed any such SEC Reports prior to the expiration of any such extension.  As of their respective filing dates, or to the extent corrected by a subsequent restatement or subsequent filings, the SEC Reports complied in all material respects with the requirements of the Securities Act and the Exchange Act and the rules and regulations of the Commission promulgated thereunder.  The Company has never been an issuer subject to Rule 144(i) under the Securities Act.

(i)            Financial Statements.  The financial statements of the Company included in the SEC Reports comply in all material respects with applicable accounting requirements and the rules and regulations of the Commission with respect thereto as in effect at the time of filing (or to the extent corrected by a subsequent restatement).  Such financial statements have been prepared in accordance with GAAP applied on a consistent basis during the periods involved, except as may be otherwise specified in such financial statements or the notes thereto and except that unaudited financial statements may not contain all

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footnotes required by GAAP, and fairly present in all material respects the financial position of the Company and its consolidated subsidiaries taken as a whole as of and for the dates thereof and the results of operations and cash flows for the periods then ended, subject, in the case of unaudited statements, to normal, year-end audit adjustments.

(j)            Tax Matters.  Except as otherwise provided in Schedule 3.1(j) hereto, the Company (i) has prepared and filed all foreign, federal and state income and all other tax returns, reports and declarations required by any jurisdiction to which it is subject, (ii) has paid all taxes and other governmental assessments and charges that are material in amount, shown or determined to be due on such returns, reports and declarations, except those being contested in good faith, with respect to which adequate reserves have been set aside on the books of the Company and (iii) has set aside on its books provisions reasonably adequate for the payment of all taxes for periods subsequent to the periods to which such returns, reports or declarations apply, except, in the case of clauses (i) and (ii) above, where the failure to so pay or file any such tax, assessment, charge or return would not have a Material Adverse Effect.

(k)           Material Changes.  Since the date of the latest financial statements included within the SEC Reports, except as specifically disclosed in the SEC Reports, (i) there have been no events, occurrences or developments that have had or would reasonably be expected to have, either individually or in the aggregate, a Material Adverse Effect, and (ii) there has not been any material change or amendment to, or any waiver of any material right by the Company under, any Material Contract.

(l)            Environmental Matters.  To the Company’s Knowledge, neither the Company nor any of its Subsidiaries (i) is in violation of any statute, rule, regulation, decision or order of any governmental agency or body or any court, domestic or foreign, relating to the use, disposal or release of hazardous or toxic substances or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, “Environmental Laws”), (ii) owns or operates any real property contaminated with any substance that is in violation of any Environmental Laws, (iii) is liable for any off-site disposal or contamination pursuant to any Environmental Laws, or (iv) is subject to any claim relating to any Environmental Laws; which violation, contamination, liability or claim has had or would have, individually or in the aggregate, a Material Adverse Effect; and, to the Company’s Knowledge, there is no pending or threatened investigation that might lead to such a claim.

(m)          Litigation.  To the Company’s Knowledge, there is no Action which (i) adversely affects or challenges the legality, validity or enforceability of any of the Transaction Documents or the Securities or (ii) except as specifically disclosed in the SEC Reports, is reasonably likely to have a Material Adverse Effect, individually or in the aggregate, if there were an unfavorable decision.  The Commission has not issued any stop order or other order suspending the effectiveness of any registration statement filed by the Company or any of its Subsidiaries under the Exchange Act or the Securities Act.

(n)           Employment Matters.  No material labor dispute exists or, to the Company’s Knowledge, is imminent with respect to any of the employees of the Company which would have a Material Adverse Effect.  To the Company’s Knowledge, it is in compliance with all U.S. federal, state, local and foreign laws and regulations relating to employment and employment practices, terms and conditions of employment and wages and hours, except where the failure to be in compliance would not, individually or in the aggregate, have a Material Adverse Effect.

(o)           Compliance.  Neither the Company nor any of its Subsidiaries (i) is in default under or in violation of (and no event has occurred that has not been waived that, with notice or lapse of time or both, would result in a default by the Company or any of its Subsidiaries under), nor has the Company or any of its Subsidiaries received written notice of a claim that it is in default under or that it is in violation of, any Material Contract (whether or not such default or violation has been waived), (ii) is in violation of any order of which the Company has been made aware in writing of any court, arbitrator or governmental body having jurisdiction over the Company or its properties or assets, or (iii) is in violation of, or in receipt of written

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notice that it is in violation of, any statute, rule or regulation of any governmental authority applicable to the Company, except in each case as would not, individually or in the aggregate, have a Material Adverse Effect.

(p)           Regulatory Permits.  The Company possesses or has applied for all certificates, authorizations and permits issued by the appropriate federal, state, local or foreign regulatory authorities necessary to conduct its business as currently conducted and as described in the SEC Reports, except where the failure to possess such permits, individually or in the aggregate, has not and would not have, individually or in the aggregate, a Material Adverse Effect (“Material Permits”), and (i) neither the Company nor any of its Subsidiaries has received any notice in writing of proceedings relating to the revocation or material adverse modification of any such Material Permits and (ii) the Company is unaware of any facts or circumstances that would give rise to the revocation or material adverse modification of any Material Permits.

(q)           Title to Assets.  The Company and its Subsidiaries do not own any real property. The Company and its Subsidiaries have good and marketable title to all tangible personal property owned by them which is material to the business of the Company and its Subsidiaries, taken as a whole, in each case free and clear of all Liens except such as do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company and any of its Subsidiaries or as otherwise set forth in the SEC Reports.  Except as set forth on Schedule 3.1(q), any real property and facilities held under lease by the Company and any of its Subsidiaries are held by them under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company and its Subsidiaries.

(r)            Patents and Trademarks.  Except as otherwise provided in Schedule 3.1(r) hereto, the Company and its Subsidiaries own, possess, license or have other rights to use all foreign and domestic patents, patent applications, trade and service marks, trade and service mark registrations, trade names, copyrights, inventions, trade secrets, technology, Internet domain names, know-how and other intellectual property (collectively, the “Intellectual Property”) necessary for the conduct of their respective businesses as now conducted, as described in the SEC Reports (the “Company Intellectual Property”).  Except as set forth in the SEC Reports or as otherwise provided in Schedule 3.1(r) hereto, (a) to the Company’s Knowledge, there are no rights of third parties to any such Company Intellectual Property; (b) to the Company’s Knowledge, there is no pending or threatened action, suit, proceeding or claim by others challenging the Company’s and its Subsidiaries’ rights in or to any such Company Intellectual Property; and (c) to the Company’s Knowledge, there is no pending or threatened action, suit, proceeding or claim by others that the Company and/or any Subsidiary infringes or otherwise violates any Intellectual Property of others, except, in the case of clauses (a), (b) or (c) above, to the extent such rights, violations or infringements would not have, either individually or in the aggregate, a Material Adverse Effect.

(s)           Internal Accounting Controls; Disclosure Controls.  Except as has not had or would not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect, the Company (i) has established and maintained disclosure controls and procedures and internal control over financial reporting (as such terms are defined in paragraphs (e) and (f), respectively, of Rule 13a-15 under the Exchange Act) as required by Rule 13a-15 under the Exchange Act, and (ii) has disclosed based on its most recent evaluations, to its outside auditors and the Audit Committee of the Board of Directors of the Company (A) all significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) that are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial data, and (B) any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal controls over financial reporting.

(t)            Sarbanes-Oxley.  The Company is in compliance in all material respects with all of the provisions of the Sarbanes-Oxley Act of 2002 which are applicable to it, except where such noncompliance would not have, individually or in the aggregate, a Material Adverse Effect.

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(u)           Certain Fees.  Except as identified in Schedule 3.1(u) hereto, no person or entity will have, as a result of the transactions contemplated by this Agreement, any valid right, interest or claim against or upon the Company or a Purchaser for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Company.  The Company shall indemnify, pay, and hold each Purchaser harmless against, any liability, loss or expense (including, without limitation, attorneys’ fees and out-of-pocket expenses) arising in connection with any such right, interest or claim.

(v)           Private Placement.  Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2 of this Agreement and the accuracy of the information disclosed in the Accredited Investor Questionnaires, no registration under the Securities Act is required for the offer and sale of the Shares and Warrants by the Company to the Purchasers under the Transaction Documents.

(w)          Registration Rights.  Other than as set forth in Schedule 3.1(w) and other than each of the Purchasers, no Person has any right to cause the Company to effect the registration under the Securities Act of any securities of the Company other than those securities which are currently registered on an effective registration statement on file with the Commission.

(x)           No Integrated Offering.  Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2, none of the Company, its Subsidiaries nor, to the Company’s Knowledge, any of its Affiliates or any Person acting on its behalf has, directly or indirectly, at any time within the past six months, made any offers or sales of any Company security or solicited any offers to buy any security under circumstances that would (i) eliminate the availability of the exemption from registration under Regulation D under the Securities Act in connection with the offer and sale by the Company of the Shares and Warrants as contemplated hereby or (ii) cause the offering of the Shares and Warrants pursuant to the Transaction Documents to be integrated with prior offerings by the Company for purposes of any applicable law, regulation or stockholder approval provisions, including, without limitation, under the rules and regulations of any Trading Market on which any of the securities of the Company are listed or designated.

(y)           Listing and Maintenance Requirements.  The Company’s Common Stock is registered pursuant to Section 12(b) of the Exchange Act, and the Company has taken no action designed to terminate the registration of the Common Stock under the Exchange Act nor has the Company received any notification that the Commission is contemplating terminating such registration.  The Company has not, in the 12 months preceding the date hereof, received written notice from any Trading Market on which the Common Stock is listed or quoted to the effect that the Company is not in compliance with the listing or maintenance requirements of such Trading Market.  The Company is in compliance in all material respects with the listing and maintenance requirements for continued trading of the Common Stock on the Principal Trading Market.

(z)            Disclosure.  To the Company’s Knowledge, no event or circumstance has occurred or information exists with respect to the Company or any of its Subsidiaries or its or their business, properties, operations or financial conditions, which, under applicable law, rule or regulation, requires public disclosure or announcement by the Company but which has not been so publicly announced or disclosed (assuming for this purpose that the Company’s reports filed under the Exchange Act are being incorporated into an effective registration statement filed by the Company under the Securities Act), except for the announcement of this Agreement and related transactions and as may be disclosed on the Form 8-K filed pursuant to Section 4.6.   Any written materials furnished by or on behalf of the Company to the Purchasers regarding the Company, its business and the transactions contemplated hereby, including the Disclosure Schedules to this Agreement, are true and correct in all material respects and do not contain any untrue statements of a material fact or omit to state any material facts necessary in order to make the statements made therein, in light of the circumstances under which they were made, not misleading.  The Company

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acknowledges and agrees that no Purchaser makes or has made any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in Section 3.2 hereof.

(aa)         No General Solicitation.  The Company did not offer the Securities as a general solicitation in the form of an advertisement, article, notice or other communication regarding the Securities published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general advertisement.

(bb)         Use of Form S-3.  The Company meets the registration and transaction requirements for use of Form S-3 for the registration of the Shares and the Warrant Shares for resale by the Purchasers.

(cc)         Insurance.  The Company and the Subsidiaries are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as the Company believes are prudent and customary in the businesses in which the Company and the Subsidiaries are engaged, including, but not limited to, directors and officers insurance coverage.  Neither the Company nor any Subsidiary has any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain similar coverage from similar insurers as may be necessary to continue its business without a significant increase in cost.

(dd)         Transactions With Affiliates and Employees.  Except as set forth in the SEC Reports and except for the issuance of Securities pursuant to this Agreement, none of the officers or directors of the Company and, to the knowledge of the Company, none of the employees of the Company is presently a party to any transaction with the Company or any Subsidiary (other than for services as employees, officers and directors), including any contract, agreement or other arrangement providing for the furnishing of services to or by, providing for rental of real or personal property to or from, or otherwise requiring payments to or from any officer, director or such employee or, to the knowledge of the Company, any entity in which any officer, director, or any such employee has a substantial interest or is an officer, director, trustee or partner, in each case in excess of $120,000 other than for (i) payment of salary or consulting fees for services rendered, (ii) reimbursement for expenses incurred on behalf of the Company and (iii) other employee benefits, including stock option agreements under any stock option plan of the Company.

(ee)         Investment Company. The Company is not, and is not an Affiliate of, and immediately after receipt of payment for the Securities, will not be or be an Affiliate of, an “investment company” within the meaning of the Investment Company Act of 1940, as amended.  The Company shall conduct its business in a manner so that it will not become an “investment company” subject to registration under the Investment Company Act of 1940, as amended.

(ff)           No Integrated Offering. Assuming the accuracy of the Purchasers’ representations and warranties set forth in Section 3.2, neither the Company, nor any of its Affiliates, nor any Person acting on its or their behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers to buy any security, under circumstances that would cause this offering of the Securities to be integrated with prior offerings by the Company for purposes of any applicable shareholder approval provisions of any Trading Market on which any of the securities of the Company are listed or designated.

(gg)         Foreign Corrupt Practices.  Neither the Company, nor to the knowledge of the Company, any agent or other person acting on behalf of the Company, has (i) directly or indirectly, used any funds for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity, (ii) made any unlawful payment to foreign or domestic government officials or employees or to any foreign or domestic political parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by any person acting on its behalf of which the Company is aware) which is in violation of law, or (iv) violated in any material respect any provision of the Foreign Corrupt Practices Act of 1977, as amended.

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(hh)         Acknowledgment Regarding Purchasers’ Purchase of Securities.  The Company acknowledges and agrees that each of the Purchasers is acting solely in the capacity of an arm’s length purchaser with respect to the Transaction Documents and the transactions contemplated thereby.  The Company further acknowledges that no Purchaser is acting as a financial advisor or fiduciary of the Company (or in any similar capacity) with respect to the Transaction Documents and the transactions contemplated thereby and any advice given by any Purchaser or any of their respective representatives or agents in connection with the Transaction Documents and the transactions contemplated thereby is merely incidental to the Purchasers’ purchase of the Securities.  The Company further represents to each Purchaser that the Company’s decision to enter into this Agreement and the other Transaction Documents has been based solely on the independent evaluation of the transactions contemplated hereby by the Company and its representatives.

(ii)           Acknowledgement Regarding Purchaser’s Trading Activity.  Anything in this Agreement or elsewhere herein to the contrary notwithstanding (except for Sections 3.2(h) and 4.15 hereof), it is understood and acknowledged by the Company that: (i) none of the Purchasers have been asked by the Company to agree, nor has any Purchaser agreed, to desist from purchasing or selling, long and/or short, securities of the Company, or “derivative” securities based on securities issued by the Company or to hold the Securities for any specified term; (ii) past or future open market or other transactions by any Purchaser, specifically including, without limitation, Short Sales or “derivative” transactions, before or after the closing of this or future private placement transactions, may negatively impact the market price of the Company’s publicly-traded securities; (iii) any Purchaser, and counter-parties in “derivative” transactions to which any such Purchaser is a party, directly or indirectly, presently may have a “short” position in the Common Stock, and (iv) each Purchaser shall not be deemed to have any affiliation with or control over any arm’s length counter-party in any “derivative” transaction.  The Company further understands and acknowledges that (y) one or more Purchasers may engage in hedging activities at various times during the period that the Securities are outstanding, including, without limitation, during the periods that the value of the Warrant Shares deliverable with respect to Securities are being determined, and (z) such hedging activities (if any) could reduce the value of the existing stockholders’ equity interests in the Company at and after the time that the hedging activities are being conducted.  The Company acknowledges that such aforementioned hedging activities do not constitute a breach of any of the Transaction Documents.

(jj)           Regulation M Compliance.  The Company has not, and to its knowledge no one acting on its behalf has, (i) taken, directly or indirectly, any action designed to cause or to result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of any of the Securities, (ii) sold, bid for, purchased, or, paid any compensation for soliciting purchases of, any of the Securities, or (iii) paid or agreed to pay to any Person any compensation for soliciting another to purchase any other securities of the Company, other than, in the case of clauses (ii) and (iii), compensation paid to the Company’s placement agent in connection with the placement of the Securities.

(kk)         Application of Takeover Protections.  The Company and the Board of Directors have taken all necessary action, if any, in order to render inapplicable any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or other similar anti takeover provision under the Company’s certificate of incorporation (or similar charter documents) or the laws of its state of incorporation that is or could become applicable to the Purchasers as a result of the Purchasers and the Company fulfilling their obligations or exercising their rights under the Transaction Documents, including without limitation as a result of the Company’s issuance of the Securities and the Purchasers’ ownership of the Securities.

(ll)           Indebtedness.  The SEC Reports set forth as of the dates specified therein all outstanding secured and unsecured Indebtedness of the Company or any Subsidiary, or for which the Company or any Subsidiary has commitments. For the purposes of this Agreement, “Indebtedness” means (a) any liabilities for borrowed money or amounts owed in excess of $50,000 (other than trade accounts payable incurred in the ordinary course of business) and (b) all guaranties, endorsements and other

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contingent obligations in respect of indebtedness of others, whether or not the same are or should be reflected in the Company’s balance sheet (or the notes thereto), except guaranties by endorsement of negotiable instruments for deposit or collection or similar transactions in the ordinary course of business. Neither the Company nor any Subsidiary is in material default with respect to any Indebtedness.

3.2           Representations and Warranties of the Purchasers.  Each Purchaser hereby, for itself and for no other Purchaser, represents and warrants as of the date hereof and as of the Closing Date to the Company as follows:

(a)           Organization; Authority.  Such Purchaser is an entity duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization with the requisite corporate or partnership power and authority to enter into and to consummate the transactions contemplated by the applicable Transaction Documents and otherwise to carry out its obligations hereunder and thereunder.  The execution, delivery and performance by such Purchaser of the transactions contemplated by this Agreement have been duly authorized by all necessary corporate or, if such Purchaser is not a corporation, such partnership, limited liability company or other applicable like action, on the part of such Purchaser.  This Agreement has been duly executed by such Purchaser, and when delivered by such Purchaser in accordance with the terms hereof, will constitute the valid and legally binding obligation of such Purchaser, enforceable against it in accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium, liquidation or similar laws relating to, or affecting generally the enforcement of, creditors’ rights and remedies or by other equitable principles of general application.

(b)           No Conflicts.  The execution, delivery and performance by such Purchaser of this Agreement and the consummation by such Purchaser of the transactions contemplated hereby will not (i) result in a violation of the organizational documents of such Purchaser, (ii) conflict with, or constitute a default (or an event which with notice or lapse of time or both would become a default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, any agreement, indenture or instrument to which such Purchaser is a party, or (iii) result in a violation of any law, rule, regulation, order, judgment or decree (including federal and state securities laws) applicable to such Purchaser, except in the case of clauses (ii) and (iii) above, for such conflicts, defaults, rights or violations which would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the ability of such Purchaser to perform its obligations hereunder.

(c)           Investment Intent.  Such Purchaser understands that the Securities are “restricted securities” and have not been registered under the Securities Act or any applicable state securities law and is acquiring the Securities and, upon exercise of the Warrants, will acquire the Warrant Shares issuable upon exercise thereof as principal for its own account and not with a view to, or for distributing or reselling such Securities or any part thereof in violation of the Securities Act or any applicable state securities laws, provided, however, that by making the representations herein, such Purchaser does not agree to hold any of the Securities for any minimum period of time and reserves the right, subject to the provisions of this Agreement, at all times to sell or otherwise dispose of all or any part of such Securities or Warrant Shares pursuant to an effective registration statement under the Securities Act or under an exemption from such registration and in compliance with applicable federal and state securities laws.  Such Purchaser is acquiring the Securities hereunder in the ordinary course of its business. Such Purchaser does not presently have any agreement, plan or understanding, directly or indirectly, with any Person to distribute or effect any distribution of any of the Securities (or any securities which are derivatives thereof) to or through any person or entity; such Purchaser is not a registered broker-dealer under Section 15 of the Exchange Act or an entity engaged in a business that would require it to be so registered as a broker-dealer.

(d)           Purchaser Status.  At the time such Purchaser was offered the Securities, it was, and at the date hereof it is, an “accredited investor” as defined in Rule 501(a) under the Securities Act.  Such Purchaser is not required to be registered as a broker-dealer under Section 15 of the Exchange Act.

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(e)           General Solicitation.  Such Purchaser is not purchasing the Securities as a result of any advertisement, article, notice or other communication regarding the Securities published in any newspaper, magazine or similar media or broadcast over television or radio or presented at any seminar or any other general advertisement.

(f)            Experience of Such Purchaser.  Such Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Securities, and has so evaluated the merits and risks of such investment.  Such Purchaser is able to bear the economic risk of an investment in the Securities and, at the present time, is able to afford a complete loss of such investment.

(g)           Access to Information.  Such Purchaser acknowledges that it has had the opportunity to review the Disclosure Materials and has been afforded (i) the opportunity to ask such questions as it has deemed necessary of, and to receive answers from, representatives of the Company concerning the terms and conditions of the offering of the Securities and the merits and risks of investing in the Securities; (ii) access to information about the Company and the Subsidiaries and their respective financial condition, results of operations, business, properties, management and prospects sufficient to enable it to evaluate its investment; and (iii) the opportunity to obtain such additional information that the Company possesses or can acquire without unreasonable effort or expense that is necessary to make an informed investment decision with respect to the investment.  Neither such inquiries nor any other investigation conducted by or on behalf of such Purchaser or its representatives or counsel shall modify, amend or affect such Purchaser’s right to rely on the truth, accuracy and completeness of the Disclosure Materials and the Company’s representations and warranties contained in the Transaction Documents.  Such Purchaser has sought such accounting, legal and tax advice as it has considered necessary to make an informed decision with respect to its acquisition of the Securities.

(h)           Certain Trading Activities.  Other than with respect to the transactions contemplated herein, since the time that such Purchaser was first contacted by the Company or any other Person regarding the transactions contemplated hereby, neither the Purchaser nor any Affiliate of such Purchaser which (x) had knowledge of the transactions contemplated hereby, (y) has or shares discretion relating to such Purchaser’s investments or trading or information concerning such Purchaser’s investments, including in respect of the Shares and Warrants, and (z) is subject to such Purchaser’s review or input concerning such Affiliate’s investments or trading (collectively, “Trading Affiliates”), has directly or indirectly, nor has any Person acting on behalf of or pursuant to any understanding with such Purchaser or Trading Affiliate, effected or agreed to effect any purchases or sales of the securities of the Company (including, without limitation, any Short Sales involving the Company’s securities).  Notwithstanding the foregoing, in the case of a Purchaser and/or Trading Affiliate that is, individually or collectively, a multi-managed investment bank or vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s or Trading Affiliate’s assets and the portfolio managers have no direct knowledge of the investment decisions made by the portfolio managers managing other portions of such Purchaser’s or Trading Affiliate’s assets, the representation set forth above shall apply only with respect to the portion of assets managed by the portfolio manager that have knowledge about the financing transaction contemplated by this Agreement.

(i)            Brokers and Finders.  No Person will have, as a result of the transactions contemplated by this Agreement, any valid right, interest or claim against or upon the Company or any Purchaser for any commission, fee or other compensation pursuant to any agreement, arrangement or understanding entered into by or on behalf of the Purchaser.

(j)            Independent Investment Decision.  Such Purchaser has independently evaluated the merits of its decision to purchase Shares and Warrants pursuant to the Transaction Documents, and such Purchaser confirms that it has not relied on the advice of any other Purchaser’s business and/or legal counsel in making such decision.  Such Purchaser understands that nothing in this Agreement or any other materials presented by or on behalf of the Company to the Purchaser in connection with the purchase of the Shares and

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Warrants constitutes legal, tax or investment advice.  Such Purchaser has consulted such legal, tax and investment advisors as it, in its sole discretion, has deemed necessary or appropriate in connection with its purchase of the Shares and Warrants.

(k)           Reliance on Exemptions.  Such Purchaser understands that the Shares and Warrants being offered and sold to it in reliance on specific exemptions from the registration requirements of United States federal and state securities laws and that the Company is relying in part upon the truth and accuracy of, and such Purchaser’s compliance with, the representations, warranties, agreements, acknowledgements and understandings of such Purchaser set forth herein in order to determine the availability of such exemptions and the eligibility of such Purchaser to acquire the Shares and Warrants.

(l)            No Governmental Review.  Such Purchaser understands that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation or endorsement of the Securities or the fairness or suitability of the investment in the Securities nor have such authorities passed upon or endorsed the merits of the offering of the Securities.

(m)          Regulation M.  Such Purchaser is aware that the anti-manipulation rules of Regulation M under the Exchange Act may apply to sales of Common Stock and other activities with respect to the Common Stock by the Purchasers.

(n)           Residency.  Such Purchaser’s residence (if an individual) or office in which its investment decision with respect to the Shares and Warrants was made (if an entity) are located at the address immediately below such Purchaser’s name on its signature page hereto.

The Company and each of the Purchasers acknowledge and agree that no party to this Agreement has made or makes any representations or warranties with respect to the transactions contemplated hereby other than those specifically set forth in this Article III and the Transaction Documents.  The Company acknowledges and agrees that the representations contained in Section 3.2 shall not modify, amend or affect such Purchaser’s right to rely on the Company’s representations and warranties contained in this Agreement or any representations and warranties contained in any other Transaction Document or any other document or instrument executed and/or delivered in connection with this Agreement or the consummation of the transaction contemplated hereby.

ARTICLE IV
OTHER AGREEMENTS OF THE PARTIES

4.1           Transfer Restrictions.

(a)           Compliance with Laws.  Notwithstanding any other provision of this Article IV, each Purchaser covenants that the Securities may be disposed of only pursuant to an effective registration statement under, and in compliance with the requirements of, the Securities Act, or pursuant to an available exemption from, or in a transaction not subject to, the registration requirements of the Securities Act, and in compliance with any applicable state, federal or foreign securities laws.  In connection with any transfer of the Securities other than (i) pursuant to an effective registration statement, (ii) to the Company, or (iii) pursuant to Rule 144 (provided that the Purchaser provides the Company with reasonable assurances (in the form of seller and broker representation letters) that the securities may be sold pursuant to such rule), the Company may require the transferor thereof to provide to the Company and the Transfer Agent, at the transferor’s expense, an opinion of counsel selected by the transferor and reasonably acceptable to the Company and the Transfer Agent, the form and substance of which opinion shall be reasonably satisfactory to the Company and the Transfer Agent, to the effect that such transfer does not require registration of such transferred Securities under the Securities Act.  As a condition of transfer (other than pursuant to clauses (i), (ii) or (iii) of the preceding sentence), any such transferee shall agree in writing to be bound by the terms of

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this Agreement and shall have the rights of a Purchaser under this Agreement with respect to such transferred Securities.

(b)           Legends.  Certificates evidencing the Securities shall bear any legend as required by the “blue sky” laws of any state and a restrictive legend in substantially the following form, until such time as they are not required under Section 4.1(c) or applicable law:

[NEITHER THESE SECURITIES NOR THE SECURITIES ISSUABLE UPON EXERCISE OF THESE SECURITIES HAVE BEEN REGISTERED] [THESE SECURITIES HAVE NOT BEEN REGISTERED] UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR APPLICABLE STATE SECURITIES LAWS.  THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OR (B) AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS OR BLUE SKY LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL REASONABLY SATISFACTORY TO THE COMPANY AND ITS TRANSFER AGENT OR (II) UNLESS SOLD PURSUANT TO RULE 144 UNDER SAID ACT.  NO REPRESENTATION IS MADE BY THE ISSUER AS TO THE AVAILABILITY OF THE EXEMPTION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT FOR RESALES OF THESE SECURITIES.

(c)           Removal of Legends.  The restrictive legend set forth in Section 4.1(b) above shall be removed and the Transfer Agent or the Company, as the case may be, shall issue a certificate without such restrictive legend or any other restrictive legend to the holder of the applicable Securities upon which it is stamped or issue to such holder by electronic delivery at the applicable balance account at the Depository Trust Company (“DTC”), if (i) such Securities are registered for resale under the Securities Act (provided that, if the Purchaser is selling pursuant to the effective registration statement registering the Securities for resale, the Purchaser agrees to only sell such Securities during such time that such registration statement is effective and not withdrawn or suspended, and only as permitted by such registration statement), (ii) such Securities are sold or transferred pursuant to Rule 144 (if the transferor is not an Affiliate of the Company), or (iii) such Securities are eligible for sale under Rule 144, without the requirement for the Company to be in compliance with the current public information required under Rule 144 as to such securities and without volume or manner-of-sale restrictions.  Certificates for Securities subject to legend removal hereunder may be transmitted by the Transfer Agent to the Purchasers by crediting the account of the Purchaser’s prime broker with DTC as directed by such Purchaser.  Any Transfer Agent fees associated with the removal of such legend shall be borne by the Company.

(d)           Acknowledgement.  Each Purchaser hereunder acknowledges its primary responsibilities under the Securities Act and accordingly will not sell or otherwise transfer the Shares, the Warrants or the Warrant Shares or any interest therein without complying with the requirements of the Securities Act.  Except as otherwise provided below, while any Registration Statement remains effective, each Purchaser hereunder may sell the Shares and Warrant Shares in accordance with the plan of distribution contained in such Registration Statement and if it does so it will comply therewith and with the related prospectus delivery requirements unless an exemption therefrom is available.  Each Purchaser, severally and not jointly with the other Purchasers, agrees that if it is notified by the Company in writing at any time that the Registration Statement registering the resale of the Shares or the Warrant Shares is not effective or that the prospectus included in such Registration Statement no longer complies with the requirements of Section 10 of the Securities Act, the Purchaser will refrain from selling such Shares and Warrant Shares until

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such time as the Purchaser is notified by the Company that such Registration Statement is effective or such prospectus is compliant with Section 10 of the Securities Act, unless such Purchaser is able to, and does, sell such Shares or Warrant Shares pursuant to an available exemption from the registration requirements of Section 5 of the Securities Act.  Both the Company and its Transfer Agent, and their respective directors, officers, employees and agents, may rely on this Section 4.1(d).

(e)           Buy-In.  If the Company shall fail for any reason or for no reason to issue to a Purchaser unlegended certificates within three (3) Trading Days of receipt of all documents necessary for the removal of the legend set forth above (the “Deadline Date”), then, in addition to all other remedies available to such Purchaser, if on or after the Trading Day immediately following such three (3) Trading Day period, such Purchaser purchases (in an open market transaction or otherwise) shares of Common Stock to deliver in satisfaction of a sale by the holder of shares of Common Stock that such Purchaser anticipated receiving from the Company without any restrictive legend (a “Buy-In”), then the Company shall, within three (3) Trading Days after such Purchaser’s request and in such Purchaser’s sole discretion, either (i) pay cash to the Purchaser in an amount equal to such Purchaser’s total purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate (and to issue such shares of Common Stock) shall terminate, or (ii) promptly honor its obligation to deliver to such Purchaser a certificate or certificates representing such shares of Common Stock and pay cash to the Purchaser in an amount equal to the excess (if any) of the Buy-In Price over the product of (a) such number of shares of Common Stock, times (b) the closing bid price on the Deadline Date.

4.2           Acknowledgment of Dilution.  The Company acknowledges that the issuance of the Securities may result in dilution of the outstanding shares of Common Stock.  The Company further acknowledges that its obligations under the Transaction Documents, including without limitation its obligation to issue the Securities pursuant to the Transaction Documents, are unconditional and absolute and not subject to any right of set off, counterclaim, delay or reduction, regardless of the effect of any such dilution or any claim the Company may have against any Purchaser and regardless of the dilutive effect that such issuance may have on the ownership of the other stockholders of the Company.

4.3           Furnishing of Information.  In order to enable the Purchasers to sell the Securities under Rule 144 of the Securities Act, for a period of one year from the Closing, the Company shall use its commercially reasonable efforts to maintain the registration of the Shares and Warrant Shares under Section 12(b) or 12(g) of the Exchange Act and to timely file (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to the Exchange Act.  During such one year period, if the Company is not required to file reports pursuant to such laws, it will prepare and furnish to the Purchasers and make publicly available in accordance with Rule 144(c) such information as is required for the Purchasers to sell the Securities under Rule 144.

4.4           Form D and Blue Sky.  The Company agrees to timely file a Form D with respect to the Securities as required under Regulation D.  The Company, on or before the Closing Date, shall take such action as the Company shall reasonably determine is necessary in order to obtain an exemption for or to qualify the Securities for sale to the Purchasers at the Closing pursuant to this Agreement under applicable securities or “Blue Sky” laws of the states of the United States (or to obtain an exemption from such qualification).  The Company shall make all filings and reports relating to the offer and sale of the Securities required under applicable securities or “Blue Sky” laws of the states of the United States following the Closing Date.

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4.5           No Integration.  The Company shall not, and shall use its commercially reasonable efforts to ensure that no Affiliate of the Company shall, sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the Securities Act) that will be integrated with the offer or sale of the Securities in a manner that would require the registration under the Securities Act of the sale of the Securities to the Purchasers, or that will be integrated with the offer or sale of the Securities for purposes of the rules and regulations of any Trading Market such that it would require stockholder approval prior to the closing of such other transaction unless stockholder approval is obtained before the closing of such subsequent transaction.

4.6           Securities Laws Disclosure; Publicity.  By 9:00 a.m., New York City time, on the Trading Day immediately following the execution of this Agreement, the Company shall issue a press release (“Press Release”) disclosing all material terms of the transactions contemplated hereby.  On or before 9:00 a.m., New York City time, on the fourth Trading Day immediately following the execution of this Agreement, the Company will file a Current Report on Form 8-K with the Commission describing the terms of the Transaction Documents (and including as exhibits to such Current Report on Form 8-K the material Transaction Documents (including, without limitation, this Agreement)).  Notwithstanding the foregoing, the Company shall not publicly disclose the name of any Purchaser or an Affiliate of any Purchaser, or include the name of any Purchaser or an Affiliate of any Purchaser in any press release or filing with the Commission (other than the Registration Statement) or any regulatory agency or Trading Market, without the prior written consent of such Purchaser, except (i) as required by federal securities law in connection with (A) any Registration Statement and (B) the filing of final Transaction Documents (which may include conformed signatures, but not originals) with the Commission and (ii) to the extent such disclosure is required by law, request of the Staff of the Commission or Trading Market regulations, in which case the Company shall provide the Purchasers with prior written notice of such disclosure permitted under this subclause (ii).  From and after the issuance of the Press Release, no Purchaser shall be in possession of any material, non-public information received from the Company, any Subsidiary or any of their respective officers, directors, employees or agents, that is not disclosed in the Press Release unless a Purchaser shall have executed a written agreement regarding the confidentiality and use of such information Each Purchaser, severally and not jointly with the other Purchasers, covenants that until such time as the transactions contemplated by this Agreement are publicly disclosed by the Company pursuant to this Section 4.6, such Purchaser will maintain the confidentiality of all disclosures made to it in connection with this transaction (including the existence and terms of this transaction).

4.7           Indemnification.

(a)           Indemnification of Purchasers.  The Company will indemnify and hold each Purchaser and its directors, officers, stockholders, members, partners, employees and agents (and any other Persons with a functionally equivalent role of a Person holding such titles notwithstanding a lack of such title or any other title), each Person who controls such Purchaser (within the meaning of Section 15 of the Securities Act and Section 20 of the Exchange Act), and the directors, officers, stockholders, agents, members, partners or employees (and any other Persons with a functionally equivalent role of a Person holding such titles notwithstanding a lack of such title or any other title) of such controlling person (each, a “Purchaser Party”) harmless from any and all losses, liabilities, obligations, claims, contingencies, damages, costs and expenses, including all judgments, amounts paid in settlements, court costs and reasonable attorneys’ fees and costs of investigation that any such Purchaser Party may suffer or incur as a result of any breach of any of the representations, warranties, covenants or agreements made by the Company in this Agreement or in the other Transaction Documents.  The Company will not be liable to any Purchaser Party under this Agreement to the extent, but only to the extent that a loss, claim, damage or liability is attributable to any Purchaser Party’s breach of any of the representations, warranties, covenants or agreements made by such Purchaser Party in this Agreement or in the other Transaction Documents.

(b)           Conduct of Indemnification Proceedings.  Promptly after receipt by any Person (the “Indemnified Person”) of notice of any demand, claim or circumstances which would or might give rise to a

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claim or the commencement of any action, proceeding or investigation in respect of which indemnity may be sought pursuant to Section 4.7(a), such Indemnified Person shall promptly notify the Company in writing and the Company shall assume the defense thereof, including the employment of counsel reasonably satisfactory to such Indemnified Person, and shall assume the payment of all fees and expenses; provided, however , that the failure of any Indemnified Person to so notify the Company shall not relieve the Company of its obligations hereunder except to the extent that the Company is actually and materially and adversely prejudiced by such failure to notify.  In any such proceeding, any Indemnified Person shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless: (i) the Company and the Indemnified Person shall have mutually agreed to the retention of such counsel; (ii) the Company shall have failed promptly to assume the defense of such proceeding and to employ counsel reasonably satisfactory to such Indemnified Person in such proceeding; or (iii) in the reasonable judgment of counsel to such Indemnified Person, representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them.  The Company shall not be liable for any settlement of any proceeding effected without its written consent, which consent shall not be unreasonably withheld, delayed or conditioned unless the Company fails to defend any proceeding or fails to promptly respond to a settlement offer.  Without the prior written consent of the Indemnified Person, which consent shall not be unreasonably withheld, delayed or conditioned, the Company shall not effect any settlement of any pending or threatened proceeding in respect of which any Indemnified Person is or could have been a party and indemnity could have been sought hereunder by such Indemnified Party, unless such settlement includes an unconditional release of such Indemnified Person from all liability arising out of such proceeding.

4.8           Listing of Common Stock.  The Company hereby agrees to use best efforts to maintain the listing or quotation of the Common Stock on the principal Trading Market on which it is currently listed, and concurrently with the Closing, the Company shall apply to list or quote all of the Shares and Warrant Shares on such Trading Market and promptly secure the listing of all of the Shares and Warrant Shares on such Trading Market. The Company further agrees, if the Company applies to have the Common Stock traded on any other Trading Market, it will then include in such application all of the Shares and Warrant Shares, and will take such other action as is necessary to cause all of the Shares and Warrant Shares to be listed or quoted on such other Trading Market as promptly as possible.  The Company will then take all action reasonably necessary to continue the listing and trading of its Common Stock on a Trading Market and will comply in all respects with the Company’s reporting, filing and other obligations under the bylaws or rules of the Trading Market.

4.9           Use of Proceeds.  The Company intends to use the net proceeds from the sale of the Securities hereunder for working capital and general corporate purposes.

4.10         Short Sales After The Date Hereof.  Such Purchaser shall not, and shall cause its Trading Affiliates not to, engage, directly or indirectly, in any transactions in the Company’s securities (including, without limitation, any Short Sales involving the Company’s securities) during the period from the date hereof until the earlier of such time as (i) the transactions contemplated by this Agreement are first required to be publicly announced as described in Section 4.6 or (ii) this Agreement is terminated in full pursuant to Section 6.17.  Each Purchaser severally and not jointly with the other Purchasers covenants that until such time as the transactions contemplated by this Agreement are publicly disclosed by the Company as described in Section 4.6, such Purchaser will maintain the confidentiality of the existence and terms of this Agreement and the transactions contemplated hereby.  Notwithstanding the foregoing, no Purchaser makes any representation, warranty or covenant hereby that it will not engage in Short Sales in the securities of the Company after the time that the transactions contemplated by this Agreement are publicly disclosed by the Company as described in Section 4.6.  Notwithstanding the foregoing, in the event that a Purchaser is a multi-managed investment vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s assets and the portfolio managers have no direct knowledge of the investment decisions made by the portfolio managers managing other portions of such Purchaser’s assets, the representation set forth above shall apply only with respect to the portion of assets managed by the portfolio manager that have knowledge

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about the financing transaction contemplated by this Agreement.  Each Purchaser understands and acknowledges, severally and not jointly with any other Purchaser, that the Commission currently takes the position that covering a short position established prior to effectiveness of a resale registration statement with shares included in such registration statement would be a violation of Section 5 of the Securities Act, as set forth in Item 65, Section 5 under Section A, of the Manual of Publicly Available Telephone Interpretations, dated July 1997, compiled by the Office of Chief Counsel, Division of Corporation Finance.

4.11         Reservation of Common Stock.  The Company shall, so long as any of the Warrants are outstanding, take all action necessary to at all times have authorized and unissued capital stock, and reserved solely for the purpose of effecting the exercise of the Warrants from and after the Closing Date, the number of shares of Common Stock issuable upon exercise of the Warrants (without taking into account any limitations on exercise of the Warrants set forth in the Warrants).

4.12         Disclosure of Material Information.  From and after the issuance of the Press Release, no Purchaser shall be in possession of any material, non public information received from the Company, any Subsidiary or any of their respective officers, directors, employees or agents, that is not disclosed in the Press Release unless a Purchaser shall have executed a written agreement regarding the confidentiality and use of such information.  The Company and its Subsidiaries covenant and agree that neither it nor any other person acting on its or their behalf has provided or, from and after the filing of the Press Release, will provide any Purchaser or its agents or counsel with any information that the Company believes constitutes material non-public information (other than with respect to the transactions contemplated by this Agreement), unless prior thereto such Purchaser shall have executed a specific written agreement regarding the confidentiality and use of such information.  The parties agree that any confidentiality and nondisclosure agreements entered into prior to the Closing Date shall not be deemed to be a valid consent to receive any material non-public information that shall be disclosed to any Purchaser subsequent to the Closing Date.  The Company understands and confirms that each Purchaser shall be relying on the foregoing covenants in effecting transactions in securities of the Company. The Company shall not disclose the identity of any Purchaser in any filing with the SEC except as required by the rules and regulations of the SEC thereunder.  In the event of a breach of the foregoing covenant by the Company, any of its subsidiaries, or any of its or their respective officers, directors, employees and agents, in addition to any other remedy provided herein or in the Transaction Documents, a Purchaser may notify the Company, and the Company shall make public disclosure of such material nonpublic information within two (2) Trading Days of such notification.  Notwithstanding anything to the contrary set forth herein, this Section 4.12 shall not prohibit the Company from notifying the Purchasers in connection with such Purchasers’ rights set forth in Section 4.13 herein.

4.13         Limited Participation Right.  Until one (1) year from the Closing Date, such Purchaser shall have the right, but not the obligation, to purchase up to an amount equal to its Participation Percentage (as defined below) of any sale by the Company of any of its securities other than in connection with a Strategic Transaction (as defined below).  The Company shall provide at least two (2) Business Days’ prior notice of such transaction to such Purchaser and shall give such Purchaser the right to participate in such transaction.  For purposes of this Section 4.13, the term “Participation Percentage” shall mean such Purchaser’s pro rata portion of the aggregate Shares purchased hereunder.  For purposes of this Section 4.13, the term “Strategic Transaction” shall mean securities issued by the Company pursuant to a strategic transaction including, without limitation, an acquisition, joint venture, alliance, collaboration or investment transaction, provided that any such issuance is to a person which is, itself or through its subsidiaries or affiliates, an operating company and in which the Company receives strategic benefits that are in addition to the investment of funds.

4.14         Stockholder Rights Plan.  No claim will be made or enforced by the Company or, with the consent of the Company, any other Person, that any Purchaser is an “Acquiring Person” under any control share acquisition, business combination, poison pill (including any distribution under a rights agreement) or similar anti-takeover plan or arrangement in effect or hereafter adopted by the Company, or that any Purchaser could be deemed to trigger the provisions of any such plan or arrangement, by virtue of receiving

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Securities under the Transaction Documents or under any other agreement between the Company and the Purchasers.

4.15         Subsequent Equity Sales.  From the date hereof until 30 days after the Closing Date, neither the Company nor any Subsidiary shall issue shares of Common Stock or Common Stock Equivalents other than in connection with an Exempt Issuance.   For purposes of this Section 4.15, an “Exempt Issuance” means the issuance of (a) shares of Common Stock or options to employees, officers or directors of the Company pursuant to any stock or option plan in effect on the date of this Agreement, and (b) securities upon the exercise or exchange of or conversion of any Securities issued hereunder and/or other securities (including options and warrants) exercisable or exchangeable for or convertible into shares of Common Stock issued and outstanding on the date of this Agreement, provided that such securities have not been amended since the date of this Agreement to increase the number of such securities or to decrease the exercise, exchange or conversion price of such securities.

ARTICLE V
CONDITIONS PRECEDENT TO CLOSING

5.1           Conditions Precedent to the Obligations of the Purchasers to Purchase Shares and Warrants.  The obligation of each Purchaser to acquire Shares and Warrants at the Closing is subject to the fulfillment to such Purchaser’s satisfaction, on or prior to the Closing Date, of each of the following conditions, any of which may be waived by such Purchaser (as to itself only):

(a)           Representations and Warranties.  The representations and warranties of the Company contained herein shall be true and correct in all material respects as of the date when made and as of the Closing Date, as though made on and as of such date, except for such representations and warranties that speak as of a specific date.

(b)           Performance.  The Company shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by it at or prior to the Closing.

(c)           No Injunction.  No statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents.

(d)           Consents.  The Company shall have obtained in a timely fashion any and all consents, permits, approvals, registrations and waivers necessary for consummation of the purchase and sale of the Shares and Warrants at the Closing, all of which shall be and remain so long as necessary in full force and effect.

(e)           No Suspensions of Trading in Common Stock; Listing .  The Common Stock (i) shall be designated for quotation or listed on the Principal Trading Market and (ii) shall not have been suspended, as of the Closing Date, by the Commission or the Principal Trading Market from trading on the Principal Trading Market nor shall suspension by the Commission or the Principal Trading Market have been threatened, as of the Closing Date, either (A) in writing by the Commission or the Principal Trading Market or (B) by falling below the minimum listing maintenance requirements of the Principal Trading Market.

(f)            Company Deliverables .  The Company shall have delivered the Company Deliverables in accordance with Section 2.2(a).

(g)           Compliance Certificate .  The Company shall have delivered to each Purchaser a certificate, dated as of the Closing Date and signed by its Chief Executive Officer or its Chief Financial

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Officer, dated as of the Closing Date, certifying to the fulfillment of the conditions specified in Sections 5.1(a) and (b).

(h)           Termination .  This Agreement shall not have been terminated as to such Purchaser in accordance with Section 6.17 herein.

(i)            Market Events.  From the date hereof to the Closing Date, trading in the Common Stock shall not have been suspended by the Commission or the Company’s Principal Trading Market (except for any suspension of trading of limited duration agreed to by the Company, which suspension shall be terminated prior to the Closing), and, at any time prior to the Closing Date, trading in securities generally as reported by Bloomberg L.P. shall not have been suspended or limited, or minimum prices shall not have been established on securities whose trades are reported by such service, or on the Company’s Principal Trading Market, nor shall a banking moratorium have been declared either by the United States or New York State authorities nor shall there have occurred any material outbreak or escalation of hostilities or other national or international calamity of such magnitude in its effect on, or any material adverse change in, the financial markets of the United States which, in each case, in the reasonable judgment of each Purchaser, makes it impracticable or inadvisable to purchase the Securities at the Closing.

5.2           Conditions Precedent to the Obligations of the Company to sell Shares and Warrants.  The Company’s obligation to sell and issue the Shares and Warrants at the Closing is subject to the fulfillment to the satisfaction of the Company on or prior to the Closing Date of the following conditions, any of which may be waived by the Company:

(a)           Representations and Warranties.  The representations and warranties made by the Purchaser in Section 3.2 hereof shall be true and correct in all material respects as of the date when made, and as of the Closing Date as though made on and as of such date, except for representations and warranties that speak as of a specific date.

(b)           Performance.  Such Purchaser shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by such Purchaser at or prior to the Closing Date.

(c)           No Injunction.  No statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed by any court or governmental authority of competent jurisdiction that prohibits the consummation of any of the transactions contemplated by the Transaction Documents.

(d)           Consents.  The Company shall have obtained in a timely fashion any and all consents, permits, approvals, registrations and waivers necessary for consummation of the purchase and sale of the Shares and Warrants, all of which shall be and remain so long as necessary in full force and effect.

(e)           Purchasers Deliverables.  Such Purchaser shall have delivered its Purchaser Deliverables in accordance with Section 2.2(b).

(f)            Termination.  This Agreement shall not have been terminated as to such Purchaser in accordance with Section 6.17 herein.

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ARTICLE VI
MISCELLANEOUS

6.1           Fees and Expenses.  At the Closing, the Company shall reimburse the VC Investors for the legal fees of one counsel representing all of the Insider Investors in an amount not to exceed $15,000 in the aggregate in connection with the transactions contemplated by the Transaction Documents.  Other than the VC Investors’ legal fees provided above, the Company and the Purchasers shall each pay the fees and expenses of their respective advisers, counsel, accountants and other experts, if any, and all other expenses incurred by such party in connection with the negotiation, preparation, execution, delivery and performance of this Agreement.  The Company shall pay all Transfer Agent fees, stamp taxes and other taxes and duties levied in connection with the sale and issuance of the Securities to the Purchasers.

6.2           Entire Agreement.  The Transaction Documents, together with the Exhibits and Schedules thereto, contain the entire understanding of the parties with respect to the subject matter hereof and supersede all prior agreements, understandings, discussions and representations, oral or written, with respect to such matters, which the parties acknowledge have been merged into such documents, exhibits and schedules.  At or after the Closing, and without further consideration, the Company and the Purchasers will execute and deliver to the other such further documents as may be reasonably requested in order to give practical effect to the intention of the parties under the Transaction Documents.

6.3           Notices.  Any and all notices or other communications or deliveries required or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date of transmission, if such notice or communication is delivered via facsimile (provided the sender receives a machine-generated confirmation of successful transmission) at the facsimile number specified in this Section prior to 5:00 p.m., New York City time, on a Trading Day, (b) the next Trading Day after the date of transmission, if such notice or communication is delivered via facsimile at the facsimile number specified in this Section on a day that is not a Trading Day or later than 5:00 p.m., New York City time, on any Trading Day, (c) the Trading Day following the date of mailing, if sent by U.S. nationally recognized overnight courier service with next day delivery specified, or (d) upon actual receipt by the party to whom such notice is required to be given.  The address for such notices and communications shall be as follows:

If to the Company:               Helicos BioSciences Corporation
One Kendall Square
Building 700
Cambridge, Massachusetts 02139
Telephone No.:  (617) 264-1800
Facsimile No.:  (617) 264-1700
Attention:  General Counsel

With a copy to (which shall not constitute notice):

Goodwin Procter LLP
Exchange Place
53 State Street
Boston, Massachusetts 02109
Telephone No.:  (617) 570-1000
Facsimile No.:  (617) 523-1231
Attention:      Stuart M. Cable, Esq.

James A. Matarese, Esq.

If to a Purchaser:                                                      To the address set forth under such Purchaser’s name on the signature page hereof;

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or such other address as may be designated in writing hereafter, in the same manner, by such Person.

6.4           Amendments; Waivers; No Additional Consideration.  No provision of this Agreement may be waived or amended except in a written instrument signed, in the case of an amendment, by the Company and each of the Purchasers holding or having the right to acquire a majority of the Securities on a fully-diluted basis at the time of such amendment, or, in the case of a waiver, by the party against whom enforcement of any such waiver is sought.  No waiver of any default with respect to any provision, condition or requirement of this Agreement shall be deemed to be a continuing waiver in the future or a waiver of any subsequent default or a waiver of any other provision, condition or requirement hereof, nor shall any delay or omission of either party to exercise any right hereunder in any manner impair the exercise of any such right.  No consideration shall be offered or paid to any Purchaser to amend or consent to a waiver or modification of any provision of any Transaction Document unless the same consideration is also offered to all Purchasers who then hold Securities.

6.5           Construction.  The headings herein are for convenience only, do not constitute a part of this Agreement and shall not be deemed to limit or affect any of the provisions hereof.  The language used in this Agreement will be deemed to be the language chosen by the parties to express their mutual intent, and no rules of strict construction will be applied against any party.  This Agreement shall be construed as if drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Agreement or any of the Transaction Documents.

6.6           Successors and Assigns.  The provisions of this Agreement shall inure to the benefit of and be binding upon the parties and their successors and permitted assigns.  This Agreement, or any rights or obligations hereunder, may not be assigned by the Company without the prior written consent of the Purchasers.  Any Purchaser may assign its rights hereunder in whole or in part to any Person to whom such Purchaser assigns or transfers any Securities in compliance with the Transaction Documents and applicable law, provided such transferee shall agree in writing to be bound, with respect to the transferred Securities, by the terms and conditions of this Agreement that apply to the “Purchasers”.

6.7           No Third-Party Beneficiaries.  This Agreement is intended for the benefit of the parties hereto and their respective successors and permitted assigns and is not for the benefit of, nor may any provision hereof be enforced by, any other Person.

6.8           Governing Law.  All questions concerning the construction, validity, enforcement and interpretation of this Agreement shall be governed by and construed and enforced in accordance with the internal laws of the State of New York, without regard to the principles of conflicts of law thereof.  Each party agrees that all Proceedings concerning the interpretations, enforcement and defense of the transactions contemplated by this Agreement and any other Transaction Documents (whether brought against a party hereto or its respective Affiliates, employees or agents) shall be commenced exclusively in the applicable courts located in the State of New York.  Each party hereto hereby irrevocably submits to the exclusive jurisdiction of the applicable courts located in the State of New York for the adjudication of any dispute hereunder or in connection herewith or with any transaction contemplated hereby or discussed herein (including with respect to the enforcement of any of the Transaction Documents), and hereby irrevocably waives, and agrees not to assert in any Proceeding, any claim that it is not personally subject to the jurisdiction of any such courts located in the State of New York, or that such Proceeding has been commenced in an improper or inconvenient forum.  Each party hereto hereby irrevocably waives personal service of process and consents to process being served in any such Proceeding by mailing a copy thereof via registered or certified mail or overnight delivery (with evidence of delivery) to such party at the address in effect for notices to it under this Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof.  Nothing contained herein shall be deemed to limit in any way any right to serve process in any manner permitted by law.  EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF

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OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

6.9           Survival.  Subject to applicable statute of limitations, the representations, warranties, agreements and covenants contained herein shall survive the Closing and the delivery of the Shares and Warrants, except that the representations and warranties contained herein shall terminate upon the five-year anniversary of the Closing Date.

6.10         Execution.  This Agreement may be executed in two or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign the same counterpart.  In the event that any signature is delivered by facsimile transmission, or by e-mail delivery of a “.pdf” format data file, such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with the same force and effect as if such facsimile signature page were an original thereof.

6.11         Severability.  If any provision of this Agreement is held to be invalid or unenforceable in any respect, the validity and enforceability of the remaining terms and provisions of this Agreement shall not in any way be affected or impaired thereby and the parties will attempt to agree upon a valid and enforceable provision that is a reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Agreement.

6.12         Replacement of Securities.  If any certificate or instrument evidencing any Securities is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in exchange and substitution for and upon cancellation thereof, or in lieu of and substitution therefor, a new certificate or instrument, but only upon receipt of evidence reasonably satisfactory to the Company and the Transfer Agent of such loss, theft or destruction and the execution by the holder thereof of a customary lost certificate affidavit of that fact and an agreement to indemnify and hold harmless the Company and the Transfer Agent for any losses in connection therewith or, if required by the Transfer Agent, a bond in such form and amount as is required by the Transfer Agent.  The applicants for a new certificate or instrument under such circumstances shall also pay any reasonable third-party costs associated with the issuance of such replacement Securities.  If a replacement certificate or instrument evidencing any Securities is requested due to a mutilation thereof, the Company may require delivery of such mutilated certificate or instrument as a condition precedent to any issuance of a replacement.

6.13         Remedies.  In addition to being entitled to exercise all rights provided herein or granted by law, including recovery of damages, each of the Purchasers and the Company will be entitled to specific performance under the Transaction Documents.  The parties agree that monetary damages may not be adequate compensation for any loss incurred by reason of any breach of obligations described in the foregoing sentence and hereby agree to waive in any action for specific performance of any such obligation (other than in connection with any action for a temporary restraining order) the defense that a remedy at law would be adequate.

6.14         Payment Set Aside.  To the extent that the Company makes a payment or payments to any Purchaser pursuant to any Transaction Document or a Purchaser enforces or exercises its rights thereunder, and such payment or payments or the proceeds of such enforcement or exercise or any part thereof are subsequently invalidated, declared to be fraudulent or preferential, set aside, recovered from, disgorged by or are required to be refunded, repaid or otherwise restored to the Company, a trustee, receiver or any other person under any law (including, without limitation, any bankruptcy law, state or federal law, common law or equitable cause of action), then to the extent of any such restoration the obligation or part thereof originally intended to be satisfied shall be revived and continued in full force and effect as if such payment had not been made or such enforcement or setoff had not occurred.

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6.15         Adjustments in Common Stock Numbers and Prices.  In the event of any stock split, subdivision, dividend or distribution payable in shares of Common Stock (or other securities or rights convertible into, or entitling the holder thereof to receive directly or indirectly shares of Common Stock), combination or other similar recapitalization or event occurring after the date hereof and prior to the Closing, each reference in any Transaction Document to a number of shares or a price per share shall be deemed to be amended to appropriately account for such event.

6.16         Independent Nature of Purchasers’ Obligations and Rights.  The obligations of each Purchaser under any Transaction Document are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance of the obligations of any other Purchaser under any Transaction Document.  The decision of each Purchaser to purchase Securities pursuant to the Transaction Documents has been made by such Purchaser independently of any other Purchaser and independently of any information, materials, statements or opinions as to the business, affairs, operations, assets, properties, liabilities, results of operations, condition (financial or otherwise) or prospects of the Company or any Subsidiary which may have been made or given by any other Purchaser or by any agent or employee of any other Purchaser, and no Purchaser and any of its agents or employees shall have any liability to any other Purchaser (or any other Person) relating to or arising from any such information, materials, statement or opinions.  Nothing contained herein or in any Transaction Document, and no action taken by any Purchaser pursuant thereto, shall be deemed to constitute the Purchasers as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by the Transaction Documents.  Each Purchaser acknowledges that no other Purchaser has acted as agent for such Purchaser in connection with making its investment hereunder and that no Purchaser will be acting as agent of such Purchaser in connection with monitoring its investment in the Securities or enforcing its rights under the Transaction Documents.  Each Purchaser shall be entitled to independently protect and enforce its rights, including without limitation the rights arising out of this Agreement or out of the other Transaction Documents, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose.  Each Purchaser has had the opportunity to obtain its own separate legal counsel in its review and negotiation of the Transaction Documents.  The Company has elected to provide all Purchasers with the same terms and Transaction Documents for the convenience of the Company and not because it was required or requested to do so by any Purchaser.

6.17         Termination.  This Agreement may be terminated and the sale and purchase of the Shares and Warrants abandoned at any time prior to the Closing by either the Company or any Purchaser (with respect to itself only) upon written notice to the other, if the Closing has not been consummated on or prior to 5:00 p.m., New York City time, on the Outside Date; provided, however , that the right to terminate this Agreement under this Section 6.17 shall not be available to any Person whose failure to comply with its obligations under this Agreement has been the cause of or resulted in the failure of the Closing to occur on or before such time.  Nothing in this Section 6.17 shall be deemed to release any party from any liability for any breach by such party of the terms and provisions of this Agreement or the other Transaction Documents or to impair the right of any party to compel specific performance by any other party of its obligations under this Agreement or the other Transaction Documents.  In the event of a termination pursuant to this Section, the Company shall promptly notify all non-terminating Purchasers.  Upon a termination in accordance with this Section, the Company and the terminating Purchaser(s) shall not have any further obligation or liability (including arising from such termination) to the other, and no Purchaser will have any liability to any other Purchaser under the Transaction Documents as a result therefrom.

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6.18         Waiver of Conflicts.  Each party to this Agreement acknowledges that Company Counsel, outside general counsel to the Company, may have in the past performed and may now or in the future represent one or more Purchasers or their affiliates in matters unrelated to the transactions contemplated by the Transaction Documents, including representation of such Purchasers or their affiliates in matters of a similar nature to the transactions contemplated by the Transaction Documents.  The applicable rules of professional conduct require that Company Counsel inform the parties hereunder of this representation and obtain their consent.  Company Counsel has served as outside general counsel to the Company and has negotiated the terms of the transactions contemplated by the Transaction Documents solely on behalf of the Company.  The Company and each Purchaser hereby (a) acknowledge that they have had an opportunity to ask for and have obtained information relevant to such representation, including disclosure of the reasonably foreseeable adverse consequences of such representation; (b) acknowledge that with respect to the transactions contemplated by the Transaction Documents, Company Counsel has represented solely the Company, and not any Purchaser or any stockholder, director or employee of the Company or any Purchaser; and (c) gives its informed consent to Company Counsel’s representation of the Company in the transactions contemplated by the Transaction Documents.

6.19         Rescission and Withdrawal Right.  Notwithstanding anything to the contrary contained in (and without limiting any similar provisions of) the Transaction Documents, whenever any Investor exercises a right, election, demand or option under a Transaction Document and the Company does not timely perform its related obligations within the periods therein provided, then such Investor may rescind or withdraw, in its sole discretion from time to time upon written notice to the Company, any relevant notice, demand or election in whole or in part without prejudice to its future actions and rights.

6.20         Equal Treatment of Purchasers.  No consideration shall be offered or paid to any Person to amend or consent to a waiver or modification of any provision of this Agreement or the Warrants unless the same consideration is also offered to all of the parties to this Agreement.  For clarification purposes, this provision constitutes a separate right granted to each Purchaser by the Company and negotiated separately by each Purchaser, and is intended for the Company to treat the Purchasers as a class and shall not in any way be construed as the Purchasers acting in concert or as a group with respect to the purchase, disposition or voting of Securities or otherwise.

6.21         Aggregation of Stock.  All Securities held or acquired by affiliated Persons under common management or control shall be aggregated together for the purpose of determining the availability of any rights under this Agreement and the Transaction Documents.

6.22         Limitation of Liability.  Notwithstanding anything herein to the contrary, the Company acknowledges and agrees that the liability of a Purchaser arising directly or indirectly under any of the Transaction Documents of any and every nature whatsoever shall be satisfied solely out of the assets of such Purchaser, and that no trustee, officer, other investment vehicle or any other affiliate of such Purchaser  or any investor, shareholder or holder of shares of beneficial interest of such a Purchaser shall be personally liable for any liabilities of such Purchaser.

6.23         Liquidated Damages.  The Company’s obligations to pay any partial liquidated damages or other amounts owing under the Transaction Documents is a continuing obligation of the Company and shall not terminate until all unpaid partial liquidated damages and other amounts have been paid notwithstanding the fact that the instrument or security pursuant to which such partial liquidated damages or other amounts are due and payable shall have been canceled.

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IN WITNESS WHEREOF, the parties hereto have caused this Securities Purchase Agreement to be duly executed by their respective authorized signatories as of the date first indicated above.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]
[SIGNATURE PAGES FOR PURCHASERS FOLLOW]

EXHIBITS

SCHEDULES

3.1(a) Subsidiaries

3.1(g) Capitalization

3.1(j) Tax Matters

3.1(q) Title to Assets

3.1(r) Patents and Trademarks

3.1(u) Certain Fees

3.1(w) Registration Rights

EXHIBIT A

Form of Warrant

EXHIBIT B-1

ACCREDITED INVESTOR QUESTIONNAIRE

(ALL INFORMATION WILL BE TREATED CONFIDENTIALLY)

To:          Helicos BioSciences Corporation

This Investor Questionnaire (“Questionnaire”) must be completed by each potential investor in connection with the offer and sale of shares of common stock, par value $0.001 per share, and shares of common stock that may be issued upon exercise of certain warrants (collectively, the “Securities”), of Helicos BioSciences Corporation, a Delaware corporation (the “Corporation”).  The Securities are being offered and sold by the Corporation without registration under the Securities Act of 1933, as amended (the “Act”), and the securities laws of certain states, in reliance on the exemptions contained in Section 4(2) of the Act and on Regulation D promulgated thereunder and in reliance on similar exemptions under applicable state laws.  The Corporation must determine that a potential investor meets certain suitability requirements before offering or selling Securities to such investor.  The purpose of this Questionnaire is to assure the Corporation that each investor will meet the applicable suitability requirements.  The information supplied by you will be used in determining whether you meet such criteria, and reliance upon the private offering exemptions from registration is based in part on the information herein supplied.

This Questionnaire does not constitute an offer to sell or a solicitation of an offer to buy any security.  Your answers will be kept strictly confidential.  However, by signing this Questionnaire, you will be authorizing the Corporation to provide a completed copy of this Questionnaire to such parties as the Corporation deems appropriate in order to ensure that the offer and sale of the Securities will not result in a violation of the Act or the securities laws of any state and that you otherwise satisfy the suitability standards applicable to purchasers of the Securities.  All potential investors must answer all applicable questions and complete, date and sign this Questionnaire.  Please print or type your responses and attach additional sheets of paper if necessary to complete your answers to any item.

PART A.                BACKGROUND INFORMATION

PART B.                ACCREDITED INVESTOR QUESTIONNAIRE

In order for the Company to offer and sell the Securities in conformance with state and federal securities laws, the following information must be obtained regarding your investor status.  Please initial each category applicable to you as a Purchaser of Securities of the Company.

EXHIBIT B-2

Stock Certificate Questionnaire

Pursuant to Section 2.2(b) of the Agreement, please provide us with the following information:

EXHIBIT C

Wire Instructions

JPMorgan Chase Bank

ABA # 021000021

Account No.:  806027405

Account Name:  Helicos BioScience Corp. Subscription

EXHIBIT D

Form of Registration Rights Agreement

Schedule 3.1(a)

Subsidiaries

Schedule 3.1(g)

Capitalization

The Company recently issued approximately 3.1 million shares pursuant to the exercise of outstanding warrants issued in connection with the Company’s December 2008 private placement transaction.

Schedule 3.1(j)

Tax Matters

The Company filed it’s Federal tax return on Form 1120 for calendar year 2008 on September 12, 2009 without a valid extension from the original filing due date of March 15, 2009 due to an inadvertent communication issue.  The Company generated a loss for the period and no tax was due with the return.  The Company believes that potential penalties for this late filing will be immaterial.

Schedule 3.1(q)

Title to Assets

The term of the lease for the Company’s premises located at One Kendall Square, Building 700, Cambridge, MA 02139 expired on August 31, 2009 and the Company and its landlord are actively finalizing the documentation of a lease amendment which would extend the term of the lease.

Schedule 3.1(r)

Patents and Trademarks

In August 2006, the Company filed with the European Patent Office an opposition against European Patent No. EP 1 105 529 B1 (“the ‘529 Patent”).  On January 24, 2007, the patent owner sought to amend certain claims of the ‘529 Patent, and on February 11, 2008 the European Patent Office issued a preliminary non-binding opinion regarding various arguments made by the parties and set the matter for oral hearing.  The Company elected not to participate in the oral hearing, which occurred on October 16, 2008.  On November 4, 2008, the European Patent Office issued a decision stating that the patent was maintained as amended.  On January 13, 2009, the Company filed a Notice of Appeal with the European Patent Office, and on March 12, 2009 the Company filed its reasoned Grounds of Appeal with the European Patent Office including a request that the ‘529 Patent be revoked. The Company believes that it has meritorious defenses should the patent claims be asserted against it in Europe.  Nevertheless, patent litigation is complex and the Company cannot guarantee that any case involving the ‘529 Patent would be resolved in a manner favorable to the Company.  If the owner of the ‘529 Patent were to assert the patent against the Company in Europe, and the Company’s defenses were unsuccessful, the patent could materially adversely affect the Company’s ability to market and sell its products in Europe, which in turn could have a material adverse effect on the Company’s business, operating results, or financial conditions.

Schedule 3.1(w)

Registration Rights

The Company is obligated to file a new resale registration statement to register the remaining 58,791,617 shares of common stock, which includes the 25,652,333 shares issuable upon exercise of the warrants, issued in connection with the December 2008 PIPE financing at such time as the SEC permits and otherwise pursuant to the terms of the registration rights agreement executed in connection with such financing.  Certain shares held by the Inside Investors are subject to these registration rights.

In addition to the above, pursuant to the terms of an Amended and Restated Investor Rights Agreement, dated March 1, 2006, the Company is obligated to register approximately 13.5 million outstanding shares held by the Inside Investors.  These rights expire on May 24, 2012.

Pursuant to Section 2(g) of the Registration Rights Agreement to be entered into in connection with the Offering, the Inside Investors will agree to waive the registration rights set forth above with respect to a new registration statement to be filed to register for resale the shares issued in the Offering.

Schedule 3.1(u)

Certain Fees

The Company will be obligated to pay certain fees to Thomas Weisel Partners LLC