Warrant Assumption Agreement, dated as of May 19, 2022, by and among OTR, Holdco and Continental Stock Transfer & Trust Company

Exhibit 4.1

EXECUTION VERSION

ASSIGNMENT, ASSUMPTION AND AMENDMENT AGREEMENT

THIS ASSIGNMENT, ASSUMPTION AND AMENDMENT AGREEMENT (this “Agreement”), dated May 19, 2022, is made by and among OTR Acquisition Corp., a Delaware corporation (the “Company”), Comera Life Sciences Holdings, Inc., a Delaware corporation (“Holdco”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “Warrant Agent”) and amends the Warrant Agreement (the “Existing Warrant Agreement”), dated November 17, 2020, by and between the Company and the Warrant Agent. Capitalized terms used but not defined herein shall have the meaning ascribed to such terms in the Existing Warrant Agreement.

WHEREAS, pursuant to the Existing Warrant Agreement, the Company has issued (i) 5,223,675 Public Warrants, (ii) 5,817,757 Private Placement Warrants and (iii) zero (0) Working Capital Warrants;

WHEREAS, all of the Warrants are governed by the Existing Warrant Agreement;

WHEREAS, on January 31, 2022, the Company, Holdco, CLS Sub Merger 1 Corp. (“Merger Sub 1”), CLS Sub Merger 2 Corp. (“Merger Sub 2”) and Comera Life Sciences Inc. (“Comera”) entered into that certain Business Combination Agreement (as amended, modified or supplemented from time to time, the “Business Combination Agreement”);

WHEREAS, pursuant to the Business Combination Agreement, (i) Merger Sub 1 will merge with and into Comera (the “Comera Merger”), with Comera surviving the Comera Merger as a direct wholly owned subsidiary of Holdco, and (ii) immediately following the Company Merger, Merger Sub 2 will merge with and into the Company (the “Company Merger” and, together with the Comera Merger, the “Mergers”), with the Company surviving the Company Merger as a direct wholly owned subsidiary of Holdco, and as a result of the Mergers, the holders of shares of common stock of Comera and the Company will become holders of common stock of Holdco (the “Holdco Common Stock”);

WHEREAS, upon consummation of the Mergers, as provided in Section 4.4 of the Existing Warrant Agreement, the Warrants will no longer be exercisable for shares of common stock of the Company but instead will be exercisable (subject to the terms of the Existing Warrant Agreement as amended hereby) for shares of Holdco Common Stock;

WHEREAS, in connection with the Mergers, the Company desires to assign all of its right, title and interest in the Existing Warrant Agreement to Holdco and Holdco wishes to accept such assignment; and

WHEREAS, Section 9.8 of the Existing Warrant Agreement provides that the Company and the Warrant Agent may amend the Existing Warrant Agreement without the consent of any Registered Holders (i) to provide for the delivery of Alternative Issuance pursuant to Section 4.4 of the Existing Warrant Agreement in connection with the Mergers and the transactions contemplated by the Business Combination Agreement or (ii) as the parties may deem necessary or desirable and that the parties deem shall not adversely affect the rights of the Registered Holders under the Existing Warrant Agreement.

NOW, THEREFORE, in consideration of the mutual agreements herein contained, the parties hereto agree as follows:

Effective as of the SPAC Merger Effective Time, the Company and the Warrant Agent hereby amend the Existing Warrant Agreement as provided in this Section 2, and acknowledge and agree that the amendments to the Existing Warrant Agreement set forth in this Section 2 are to provide for the delivery of Alternative Issuance pursuant to Section 4.4 of the Existing Warrant Agreement (in connection with the Mergers and the transactions contemplated by the Business Combination Agreement).

“[INTENTIONALLY OMITTED]”

Except that the defined term “Business Day” set forth therein shall be retained for all purposes of the Existing Warrant Agreement.

“A Warrant may be exercised only during the period (the “Exercise Period”) commencing on the date that is thirty (30) days after the consummation of the transactions contemplated by the Business Combination Agreement (a “Business Combination”), and terminating at 5:00 p.m., New York City time on the earlier to occur of: (x) the date that is five (5) years after the date on which the the Business Combination is completed, (y) the liquidation of the Company, or (z) other than with respect to the Private Placement Warrants and Working Capital Warrants, the Redemption Date (as defined below) as provided in Section 6.2 hereof (the “Expiration Date”); provided, however, that the exercise of any Warrant shall be subject to the satisfaction of any applicable conditions, as set forth in subsection 3.3.2 below with respect to an effective registration statement.”

“Notices. Any notice, statement or demand authorized by this Agreement to be given or made by the Warrant Agent or by the holder of any Warrant to or on Holdco shall be sufficiently given when so delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such notice, postage prepaid, addressed (until another address is filed in writing by Holdco with the Warrant Agent), as follows:

Comera Life Sciences Holdings, Inc.

c/o Comera Life Sciences, Inc.

12 Gill Street, Suite 4650

Woburn, MA 01801

Attention: Jeffrey Hackman

Email: ***@***

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

Loeb & Loeb LLP

345 Park Avenue

New York, NY 10154

Attention: Mitchell S. Nussbaum, Esq.

Email: ***@***

and

Greenberg Traurig, P.A.
333 SE 2nd Avenue
Suite 4400
Miami, FL 33131
Email: ***@***
Attention: Daniella G. Silberstein

Any notice, statement or demand authorized by this Agreement to be given or made by the holder of any Warrant or by the Company to or on the Warrant Agent shall be sufficiently given when so delivered if by hand or overnight delivery or if sent by certified mail or private courier service within five (5) days after deposit of such notice, postage prepaid, addressed (until another address is filed in writing by the Warrant Agent with the Company), as follows:

Continental Stock Transfer & Trust Company
One State Street, 30th Floor
New York, NY 10004
Attention: Compliance Department

Any person or entity purchasing or otherwise acquiring any interest in the Warrants shall be deemed to have notice of and to have consented to the forum provisions in this Section 3.3. If any action, the subject matter of which is within the scope the forum provisions above, is filed in a court other than a court located within the State of New York or the United States District Court for the Southern District of New York (a “foreign action”) in the name of any warrant holder, such warrant holder shall be deemed to have consented to: (x) the personal jurisdiction of the state and federal courts located within the State of New York or the United States District Court for the Southern District of New York in connection with any action brought in any such court to enforce the forum provisions (an “enforcement action”), and (y) having service of process made upon such warrant holder in any such enforcement action by service upon such warrant holder’s counsel in the foreign action as agent for such warrant holder.

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IN WITNESS WHEREOF, the parties hereto have caused this Assignment, Assumption and Amendment Agreement to be duly executed as of the date first above written.