TALARIS THERAPEUTICS, INC. SUPPORT AGREEMENT

Exhibit 10.2

THIS SUPPORT AGREEMENT (this “Agreement”), dated as of June , 2023, is made by and among Talaris Therapeutics, Inc., a Delaware corporation (“Terrain”), Tourmaline Bio, Inc., a Delaware corporation (the “Company”), and the undersigned holders (each a “Stockholder”) of shares of capital stock (the “Shares”) of Terrain.

WHEREAS, Terrain, Terrain Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Terrain (“Merger Sub”), and the Company, have entered into an Agreement and Plan of Merger, dated of even date herewith (the “Merger Agreement”), providing for the merger of Merger Sub with and into the Company (the “Merger”);

WHEREAS, each Stockholder beneficially owns and has sole or shared voting power with respect to the number of Shares, and/or holds Terrain Options, Terrain RSUs and/or Terrain SARs to acquire the number of Shares indicated opposite such Stockholder’s name on Schedule 1attached hereto;

WHEREAS, as an inducement and a condition to the willingness of the Company to enter into the Merger Agreement, each Stockholder has agreed to enter into and perform this Agreement; and

WHEREAS, all capitalized terms used in this Agreement without definition herein shall have the meanings ascribed to them in the Merger Agreement.

NOW, THEREFORE, in consideration of, and as a condition to, the Company’s entering into the Merger Agreement, each Stockholder, Terrain and the Company agree as follows:

1. Agreement to Vote Shares. Each Stockholder agrees that, prior to the Expiration Date (as defined in Section 2 below), at any meeting of the stockholders of Terrain or any adjournment or postponement thereof, or in connection with any written consent of the stockholders of Terrain, with respect to the Merger, the Merger Agreement or any Acquisition Proposal, such Stockholder shall:

(a) appear at such meeting or otherwise cause the Shares and any New Shares (as defined in Section 3 below) to be counted as present thereat for purposes of calculating a quorum;

(b) from and after the date hereof until the Expiration Date, vote (or cause to be voted), or deliver a written consent (or cause a written consent to be delivered) covering all of the Shares and any New Shares that Stockholder shall be entitled to so vote: (i) in favor of the Terrain Stockholder Matters and the Equity Plan Proposals; (ii) against any Acquisition Proposal, or any agreement, transaction, matter or action that is intended to, or would reasonably be expected to, impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions; (iii) against any action or agreement that would result in a

breach of any representation, warranty, covenant or obligation of Terrain in the Merger Agreement; (iv) against each of the following actions (other than the Merger and the other Contemplated Transactions): (A) any extraordinary corporate transaction, such as a merger, consolidation, amalgamation, plan or scheme of arrangement, share exchange or other business combination involving Terrain, (B) any sale, lease, sublease, license, sublicense or transfer of a material portion of the assets of Terrain that would reasonably be expected to impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions, (C) any reorganization, recapitalization, dissolution or liquidation of any Acquired Company, (D) any amendment to the Company’s Organizational Documents, which amendment would reasonably be expected to impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions, and (E) any material change in the capitalization of Terrain or Terrain’s corporate structure; (v) in favor of an amendment of ▇▇▇▇▇▇▇’s Organizational Documents to adopt an exculpation provision for ▇▇▇▇▇▇▇’s officers; and (vi) to approve any proposal to adjourn or postpone the meeting to a later date, if there are not sufficient votes for the approval of the Terrain Stockholder Matters. Stockholder shall not take or commit or agree to take any action inconsistent with the foregoing.

2. Expiration Date. As used in this Agreement, the term “Expiration Date” shall mean the earlier to occur of (a) the Effective Time, (b) such date and time as the Merger Agreement shall be terminated pursuant to Section 10 thereof or otherwise, (c) such date and time as a Terrain Board Adverse Recommendation Change is made, or (d) the mutual written agreement of the parties to terminate this Agreement.

3. Additional Acquisitions. Each Stockholder agrees that any shares of capital stock or other equity securities of Terrain that such Stockholder acquires or with respect to which such Stockholder otherwise acquires sole or shared voting power (including any proxy) after the execution of this Agreement and prior to the Expiration Date, whether by the exercise of any Terrain Options or Terrain SARs, or the settlement of Terrain RSUs or otherwise, including, without limitation, by gift, succession, in the event of a stock split or as a dividend or distribution of any Shares (“New Shares”), shall be subject to the terms and conditions of this Agreement to the same extent as if they constituted the Shares.

4. Agreement to Retain Shares. From and after the date hereof until the Expiration Date, each Stockholder shall not, directly or indirectly, (a) sell, assign, transfer, tender, or otherwise dispose of (including, without limitation, by the creation of any Liens (as defined in Section 5(c) below)) any Shares or any New Shares, (b) deposit any Shares or New Shares into a voting trust or enter into a voting agreement or similar arrangement with respect to such Shares or New Shares or grant any proxy or power of attorney with respect thereto (other than this Agreement), (c) enter into any Contract, option, commitment or other arrangement or understanding with respect to the direct or indirect sale, transfer, assignment or other disposition of (including, without limitation, by the creation of any Liens) any Shares or New Shares, or (d) take any action that would make any representation or warranty of such Stockholder contained herein untrue or incorrect or have the effect of preventing or disabling such Stockholder from performing such Stockholder’s obligations under this Agreement. Any action taken in violation

of the foregoing sentence shall be null and void ab initio. Notwithstanding the foregoing, each Stockholder may make (1) transfers by will or by operation of Law or other transfers for estate-planning purposes, in which case this Agreement shall bind the transferee, (2) with respect to such Stockholder’s Terrain Options which expire on or prior to the Expiration Date, transfers, sale, or other disposition of Shares to Terrain, or in broker-assisted cashless exercises, as payment for the (i) exercise price of such Stockholder’s Terrain Options and (ii) taxes applicable to the exercise of such Stockholder’s Terrain Options or Terrain SARs, (3) with respect to Stockholder’s Terrain RSUs, (i) transfers for the net settlement of Stockholder’s Terrain RSUs settled in Shares (to pay any tax withholding obligations) or (ii) transfers for receipt upon settlement of such Stockholder’s Terrain RSUs, and the sale of a sufficient number of such Shares acquired upon settlement of such securities as would generate sales proceeds sufficient to pay the aggregate taxes payable by such Stockholder as a result of such settlement, (4) if such Stockholder is a partnership or limited liability company, a transfer to one or more partners or members of such Stockholder or to an Affiliated corporation, trust or other Entity under common control with such Stockholder, or if such Stockholder is a trust, a transfer to a beneficiary, provided that in each such case the applicable transferee has signed a voting agreement that is reasonably acceptable to the Company, (5) transfers to another holder of the capital stock of the Company that has signed a voting agreement that is reasonably acceptable to the Company, and (6) transfers, sales or other dispositions as the Company may otherwise agree in writing in its sole discretion. If any voluntary or involuntary transfer of any Shares covered hereby shall occur (including a transfer or disposition permitted by Section 4(1) through Section 4(6), sale by a Stockholder’s trustee in bankruptcy, or a sale to a purchaser at any creditor’s or court sale), the transferee (which term, as used herein, shall include any and all transferees and subsequent transferees of the initial transferee) shall take and hold such Shares subject to all of the restrictions, liabilities and rights under this Agreement, which shall continue in full force and effect, notwithstanding that such transferee is not a Stockholder and has not executed a counterpart hereof or joinder hereto.

5. Representations and Warranties of Stockholder. Each Stockholder hereby, severally but not jointly, represents and warrants to Terrain and the Company as follows:

(a) If such Stockholder is an Entity: (i) such Stockholder is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is incorporated, organized or constituted, (ii) such Stockholder has all necessary power and authority to execute and deliver this Agreement, to perform such Stockholder’s obligations hereunder and to consummate the transactions contemplated hereby, and (iii) the execution and delivery of this Agreement, performance of such Stockholder’s obligations hereunder and the consummation of the transactions contemplated hereby by such Stockholder have been duly authorized by all necessary action on the part of such Stockholder and no other proceedings on the part of such Stockholder are necessary to authorize this Agreement, or to consummate the transactions contemplated hereby. If such Stockholder is an individual, such Stockholder has the legal capacity to execute and deliver this Agreement, to perform such Stockholder’s obligations hereunder and to consummate the transactions contemplated hereby;

and binding agreement with respect to such Stockholder, enforceable against such Stockholder in accordance with its terms, except as enforcement may be limited by general principles of equity whether applied in a court of Law or a court of equity and by bankruptcy, insolvency and similar Laws affecting creditors’ rights and remedies generally;

(c) such Stockholder beneficially owns the number of Shares indicated opposite such Stockholder’s name on Schedule 1, which constitute all of the Shares owned by the Stockholder as of the date hereof. Such Stockholder will own any New Shares, free and clear of any liens, claims, charges or other encumbrances or restrictions of any kind whatsoever (“Liens”), and has sole or shared, and otherwise unrestricted, voting power with respect to such Shares or New Shares and none of the Shares or New Shares is subject to any voting trust or other agreement, arrangement or restriction with respect to the voting of the Shares or the New Shares, except as contemplated by this Agreement;

(d) to the knowledge of such Stockholder, the execution and delivery of this Agreement by such Stockholder does not, and the performance by such Stockholder of his, her or its obligations hereunder and the compliance by such Stockholder with any provisions hereof will not, violate or conflict with, result in a material breach of or constitute a default (or an event that with notice or lapse of time or both would become a material default) under, or give to others any rights of termination, amendment, acceleration or cancellation of, or result in the creation of any Liens on any Shares or New Shares pursuant to, any agreement, instrument, note, bond, mortgage, Contract, lease, license, permit or other obligation or any order, arbitration award, judgment or decree to which such Stockholder is a party or by which such Stockholder is bound, or any Law, statute, rule or regulation to which such Stockholder is subject or, in the event that such Stockholder is a corporation, partnership, trust or other Entity, any bylaw or other Organizational Document of such Stockholder; except for any of the foregoing as would not reasonably be expected to prevent or delay the performance by such Stockholder of his, her or its obligations under this Agreement in any material respect;

(e) the execution and delivery of this Agreement by such Stockholder does not, and the performance of this Agreement by such Stockholder does not and will not, require any consent, approval, authorization or permit of, or filing with or notification to, any Governmental Authority or regulatory authority by such Stockholder except for applicable requirements, if any, of the Exchange Act, and except where the failure to obtain such consents, approvals, authorizations or permits, or to make such filings or notifications, would not prevent or delay the performance by such Stockholder of his, her or its obligations under this Agreement in any material respect;

(f) no investment banker, broker, finder or other intermediary is entitled to a fee or commission from Terrain or the Company in respect of this Agreement based upon any Contract made by or on behalf of such Stockholder; and

(g) as of the date of this Agreement, there is no Legal Proceeding pending or, to the knowledge of such Stockholder, threatened against such Stockholder that would reasonably be expected to prevent or delay the performance by such Stockholder of his, her or its obligations under this Agreement in any material respect.

6. Irrevocable Proxy. Subject to the penultimate sentence of this Section 6, by execution of this Agreement, each Stockholder does hereby appoint the Company and any of its designees with full power of substitution and resubstitution, as such Stockholder’s true and lawful attorney and irrevocable proxy, to the fullest extent of such Stockholder’s rights with respect to the Shares, to vote and exercise all voting and related rights, including the right to sign such Stockholder’s name (solely in its capacity as a stockholder) to any Stockholder consent, if Stockholder is unable to perform or otherwise does not perform his, her or its obligations under this Agreement, with respect to such Shares solely with respect to the matters set forth in Section 1 hereof. Each Stockholder intends this proxy to be irrevocable and coupled with an interest hereunder until the Expiration Date, hereby revokes any proxy previously granted by such Stockholder with respect to the Shares and represents that none of such previously-granted proxies are irrevocable. The Stockholder hereby affirms that the proxy set forth in this Section 6 is given in connection with, and granted in consideration of, and as an inducement to the Company, Terrain and Merger Sub to enter into the Merger Agreement and that such proxy is given to secure the obligations of the Stockholder under Section 1. The irrevocable proxy and power of attorney granted herein shall survive the death or incapacity of such Stockholder and the obligations of such Stockholder shall be binding on such Stockholder’s heirs, personal representatives, successors, transferees and assigns. Each Stockholder hereby agrees not to grant any subsequent powers of attorney or proxies with respect to any Shares with respect to the matters set forth in Section 1 until after the Expiration Date. With respect to any Shares that are owned beneficially by the Stockholder but are not held of record by the Stockholder (other than shares beneficially owned by the Stockholder that are held in the name of a bank, broker or nominee), the Stockholder shall take all action necessary to cause the record holder of such Shares to grant the irrevocable proxy and take all other actions provided for in this Section 6 with respect to such Shares. Notwithstanding anything contained herein to the contrary, this irrevocable proxy shall automatically terminate upon the Expiration Date.

7. No Solicitation. From and after the date hereof until the Expiration Date, each Stockholder shall not (a) solicit, initiate or knowingly encourage, induce or facilitate the communication, making, submission or announcement of any Acquisition Proposal or Acquisition Inquiry regarding Terrain or take any action that could reasonably be expected to lead to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (b) furnish any non-public information regarding Terrain to any Person in connection with or in response to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (c) engage in discussions or negotiations with any Person with respect to any Acquisition Proposal or Acquisition Inquiry regarding Terrain, (d) approve, endorse or recommend any Acquisition Proposal (subject to Section 6.3 of the Merger Agreement), (e) execute or enter into any letter of intent or any Contract contemplating or otherwise relating to any Acquisition Transaction regarding Terrain (subject to Section 5.4 of the Merger Agreement), (f) take any action that could reasonably be expected to lead to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (g) initiate a stockholders’ vote or action by consent of the Terrain’s stockholders with respect to an Acquisition Proposal regarding Terrain, (h) except by reason of this Agreement, become a member of a “group” (as such term is defined in Section 13(d) of the Exchange Act) with respect to any voting securities of Terrain that takes any action in support of an Acquisition Proposal regarding Terrain or (i) propose or agree to do

any of the foregoing. In the event that such Stockholder is a corporation, partnership, trust or other Entity, it shall not permit any of its Subsidiaries or Affiliates to, nor shall it authorize any officer, director or representative of such Stockholder, or any of its Subsidiaries or Affiliates to, undertake any of the actions contemplated by this Section 7.

8. No Legal Actions. Each Stockholder will not in its capacity as a stockholder of Terrain bring, commence, institute, maintain, prosecute or voluntarily aid any Legal Proceeding which (i) challenges the validity or seeks to enjoin the operation of any provision of this Agreement or (ii) alleges that the execution and delivery of this Agreement by such Stockholder, either alone or together with the other voting agreements and proxies to be delivered in connection with the execution of the Merger Agreement, or the approval of the Merger Agreement and the Contemplated Transactions by the Terrain Board, constitutes a breach of any fiduciary duty of the Terrain Board or any member thereof.

9. Other Remedies; Specific Performance. Except as otherwise provided herein, any and all remedies herein expressly conferred upon a party will be deemed cumulative with and not exclusive of any other remedy conferred hereby, or by Law or equity upon such party, and the exercise by a party of any one remedy will not preclude the exercise of any other remedy. The parties agree that irreparable damage for which monetary damages, even if available, would not be an adequate remedy, would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Agreement and to enforce specifically the terms and provisions hereof in any court of the United States or any state having jurisdiction, this being in addition to any other remedy to which they are entitled at Law or in equity, and each of the parties waives any bond, surety or other security that might be required of any other party with respect thereto. Each of the parties further agrees that it will not oppose the granting of an injunction, specific performance or other equitable relief on the basis that any other party has an adequate remedy at Law or that any award of specific performance is not an appropriate remedy for any reason at Law or in equity.

10. Directors and Officers. This Agreement shall apply to each Stockholder solely in such Stockholder’s capacity as a stockholder of Terrain and/or holder of Terrain Options, Terrain RSUs and/or Terrain SARs and not in such Stockholder’s capacity as a director, officer or employee of Terrain or any of its Subsidiaries or in such Stockholder’s capacity as a trustee or fiduciary of any employee benefit plan or trust. Notwithstanding any provision of this Agreement to the contrary, nothing in this Agreement shall (or require Stockholder to attempt to) limit or restrict a director and/or officer of Terrain in the exercise of his or her fiduciary duties consistent with the terms of the Merger Agreement as a director and/or officer of Terrain or in his or her capacity as a trustee or fiduciary of any employee benefit plan or trust or prevent or be construed to create any obligation on the part of any director and/or officer of Terrain or any trustee or fiduciary of any employee benefit plan or trust from taking any action in his or her capacity as such director, officer, trustee and/or fiduciary.

11. No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest in the Company any direct or indirect ownership or incidence of ownership of or with respect to any Shares. All rights, ownership and economic benefits of and relating to the Shares shall remain vested in and belong to such Stockholder, and the Company does not have authority to

manage, direct, superintend, restrict, regulate, govern, or administer any of the policies or operations of Terrain or exercise any power or authority to direct such Stockholder in the voting of any of the Shares, except as otherwise provided herein.

12. Termination. This Agreement shall terminate and shall have no further force or effect as of the Expiration Date. Notwithstanding the foregoing, upon termination or expiration of this Agreement, no party shall have any further obligations or liabilities under this Agreement; provided, however, nothing set forth in this Section 12 or elsewhere in this Agreement shall relieve any party from liability for any fraud or for any willful and material breach of this Agreement prior to termination hereof.

13. Further Assurances. Each Stockholder shall, from time to time, execute and deliver, or cause to be executed and delivered, such additional or further consents, documents and other instruments as the Company or Terrain may reasonably request for the purpose of effectively carrying out the transactions contemplated by this Agreement and the Contemplated Transactions.

14. Disclosure. Each Stockholder hereby agrees that Terrain and the Company may publish and disclose in the Registration Statement, any prospectus filed with any regulatory authority in connection with the Contemplated Transactions and any related documents filed with such regulatory authority and as otherwise required by Law, such Stockholder’s identity and ownership of Shares and the nature of such Stockholder’s commitments, arrangements and understandings under this Agreement and may further file this Agreement as an exhibit to the Registration Statement or prospectus or in any other filing made by Terrain or the Company as required by Law or the terms of the Merger Agreement, including with the SEC or other regulatory authority, relating to the Contemplated Transactions, all subject to prior review and an opportunity to comment by ▇▇▇▇▇▇▇▇▇▇▇’s counsel. Prior to the Closing, each Stockholder shall not, and shall use its reasonable best efforts to cause its representatives not to, directly or indirectly, make any press release, public announcement or other public communication that criticizes or disparages this Agreement or the Merger Agreement or any of the Contemplated Transactions, without the prior written consent of Terrain and the Company, provided that the foregoing shall not limit or affect any actions taken by such Stockholder (or any affiliated officer or director of such Stockholder) that would be permitted to be taken by such Stockholder, Terrain or the Company pursuant to the Merger Agreement; provided, further, that the foregoing shall not effect any actions of Stockholder the prohibition of which would be prohibited under applicable Law.

15. Notice. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly delivered and received hereunder (a) one (1) Business Day after being sent for next Business Day delivery, fees prepaid, via a reputable international overnight courier service, (b) upon delivery in the case of delivery by hand or (c) on the date delivered in the place of delivery if sent by email (with a written or electronic confirmation of delivery) prior to 6:00 p.m. New York City time, otherwise on the next succeeding Business Day, in each case to the intended recipient: (i) to the Company or Terrain, as applicable, in accordance with Section 11.7 of the Merger Agreement, and (ii) to each Stockholder at his, her or its address or email address (providing confirmation of transmission) set forth on Schedule 1 attached hereto (or at such other address for a party as shall be specified by like notice).

16. Severability. Any term or provision of this Agreement that is invalid or unenforceable in any situation in any jurisdiction shall not affect the validity or enforceability of the remaining terms and provisions of this Agreement or the validity or enforceability of the offending term or provision in any other situation or in any other jurisdiction. If a final judgment of a court of competent jurisdiction declares that any term or provision of this Agreement is invalid or unenforceable, the parties hereto agree that the court making such determination shall have the power to limit such term or provision, to delete specific words or phrases or to replace such term or provision with a term or provision that is valid and enforceable and that comes closest to expressing the intention of the invalid or unenforceable term or provision, and this Agreement shall be valid and enforceable as so modified. In the event such court does not exercise the power granted to it in the prior sentence, the parties hereto agree to replace such invalid or unenforceable term or provision with a valid and enforceable term or provision that will achieve, to the extent possible, the economic, business and other purposes of such invalid or unenforceable term or provision.

17. Assignability. This Agreement shall be binding upon, and shall be enforceable by and inure solely to the benefit of, the Parties and their respective successors and assigns; provided, however, that neither this Agreement nor any of a Party’s rights or obligations hereunder may be assigned or delegated by such Party without the prior written consent of the other Party, and any attempted assignment or delegation of this Agreement or any of such rights or obligations by such Party without the other Party’s prior written consent shall be void and of no effect.

18. No Waivers. No waivers of any breach of this Agreement extended by the Company or Terrain to such Stockholder shall be construed as a waiver of any rights or remedies of the Company or Terrain, as applicable, with respect to any other stockholder of Terrain who has executed an agreement substantially in the form of this Agreement with respect to Shares held or subsequently held by such stockholder or with respect to any subsequent breach of Stockholder or any other such stockholder of Terrain. No waiver of any provisions hereof by any party shall be deemed a waiver of any other provisions hereof by any such party, nor shall any such waiver be deemed a continuing waiver of any provision hereof by such party.

19. Applicable Law; Jurisdiction. This Agreement shall be governed by, and construed in accordance with, the Laws of the state of Delaware, regardless of the Laws that might otherwise govern under applicable principles of conflicts of Laws. In any action or Legal Proceeding between any of the parties arising out of or relating to this Agreement, each of the parties: (i) irrevocably and unconditionally consents and submits to the exclusive jurisdiction and venue of the Court of Chancery of the state of Delaware or to the extent such court does not have subject matter jurisdiction, the Superior Court of the State of Delaware or the United States District Court for the District of Delaware, (ii) agrees that all claims in respect of such action or Legal Proceeding shall be heard and determined exclusively in accordance with clause (i) of this Section 19, (iii) waives any objection to laying venue in any such action or Legal Proceeding in such courts, (iv) waives any objection that such courts are an inconvenient forum or do not have jurisdiction over any party, and (v) agrees that service of process upon such party in any such action or Legal Proceeding shall be effective if notice is given in accordance with Section 15 of this Agreement.

20. Waiver of Jury Trial. The parties hereto hereby waive any right to trial by jury with respect to any action or Legal Proceeding related to or arising out of this Agreement, any document executed in connection herewith and the matters contemplated hereby and thereby.

21. No Agreement Until Executed. Irrespective of negotiations among the parties or the exchanging of drafts of this Agreement, this Agreement shall not constitute or be deemed to evidence a Contract, agreement, arrangement or understanding between the parties hereto unless and until (a) the Terrain Board has approved, for purposes of any applicable anti-takeover Laws and regulations and any applicable provision of the certificate of incorporation of Terrain, the Merger Agreement and the Contemplated Transactions, (b) the Merger Agreement is executed by all parties thereto, and (c) this Agreement is executed by all parties hereto.

22. Entire Agreement; Counterparts; Exchanges by Electronic Transmission. This Agreement and the other agreements referred to in this Agreement constitute the entire agreement and supersede all prior agreements and understandings, both written and oral, among or between any of the parties with respect to the subject matter hereof and thereof. This Agreement may be executed in several counterparts, each of which shall be deemed an original and all of which shall constitute one and the same instrument. The exchange of a fully executed Agreement (in counterparts or otherwise) by all parties by electronic transmission via “.pdf” shall be sufficient to bind the parties to the terms and conditions of this Agreement.

23. Amendment. This Agreement may not be amended, supplemented or modified, and no provisions hereof may be modified or waived, except by an instrument in writing signed on behalf of each party hereto; provided, however, that the rights or obligations of any Stockholder may be waived, amended or otherwise modified in a writing signed by ▇▇▇▇▇▇▇, the Company and such Stockholder.

24. Fees and Expenses. Except as otherwise specifically provided herein, the Merger Agreement or any other agreement contemplated by the Merger Agreement to which a party hereto is a party, each party hereto shall bear its own expenses in connection with this Agreement and the transactions contemplated hereby.

25. Voluntary Execution of Agreement. This Agreement is executed voluntarily and without any duress or undue influence on the part or behalf of the parties. Each of the parties hereby acknowledges, represents and warrants that (i) it has read and fully understood the Merger Agreement, including the provisions relating to the payment and allocation of the consideration to be paid to stockholders of Terrain as well as holders of Terrain Options, Terrain SARs and Terrain RSUs, this Agreement and the implications and consequences thereof; (ii) it has been represented in the preparation, negotiation, and execution of this Agreement by legal counsel of its own choice, or it has made a voluntary and informed decision to decline to seek such counsel; and (iii) it is fully aware of the legal and binding effect of this Agreement. The Stockholder has had an opportunity to review with its own tax advisors the tax consequences of the Merger and the Contemplated Transactions. The Stockholder understands that it must rely solely on its advisors and not on any statements or representations made by ▇▇▇▇▇▇▇, the Company or any of their respective agents or representatives. The Stockholder understands that such Stockholder (and not Terrain, the Company or the Surviving Corporation) shall be responsible for such Stockholder’s tax liability that may arise as a result of the Merger or the Contemplated Transactions. The

Stockholder understands and acknowledges that Terrain, Parent and Merger Sub are entering into the Merger Agreement in reliance upon the Stockholder’s execution, delivery and performance of this Agreement.

26. Definition of Merger Agreement. For purposes of this Agreement, the term “Merger Agreement” refers to such agreement as amended or modified, solely to the extent such amendments or modifications (a) do not (i) change the form of consideration or (ii) change the Exchange Ratio in a manner adverse to such Stockholder, or (b) have been agreed to in writing by such Stockholder.

27. Construction.

(a) For purposes of this Agreement, whenever the context requires: the singular number shall include the plural, and vice versa; the masculine gender shall include the feminine and neuter genders; the feminine gender shall include the masculine and neuter genders; and the neuter gender shall include masculine and feminine genders.

(b) The parties hereto agree that any rule of construction to the effect that ambiguities are to be resolved against the drafting party shall not be applied in the construction or interpretation of this Agreement.

(c) As used in this Agreement, the words “include” and “including,” and variations thereof, shall not be deemed to be terms of limitation, but rather shall be deemed to be followed by the words “without limitation.”

(d) Except as otherwise indicated, all references in this Agreement to “Sections,” and “Schedules” are intended to refer to Sections of this Agreement and Schedules to this Agreement, respectively.

(e) The underlined headings contained in this Agreement are for convenience of reference only, shall not be deemed to be a part of this Agreement and shall not be referred to in connection with the construction or interpretation of this Agreement.

[Remainder of Page has Intentionally Been Left Blank]

EXECUTED as of the date first above written.


[STOCKHOLDER]



Signature:

Signature Page to Terrain Support Agreement

EXECUTED as of the date first above written.


TALARIS THERAPEUTICS, INC.

By:
Name:		▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇
Title:		Interim CEO, President and CFO

TOURMALINE BIO, INC.

By:
Name:
Title:

Signature Page to Terrain Support Agreement

SCHEDULE 1

Name, Address and Email
Address of Stockholder

Shares of Terrain

Common Stock

Terrain

Options

Terrain

RSUs

Terrain

SARs

TALARIS THERAPEUTICS, INC.

SUPPORT AGREEMENT^*

WHEREAS, each Stockholder beneficially owns and has sole or shared voting power with respect to the number of Shares, and/or holds Terrain Options, Terrain RSUs and/or Terrain SARs to acquire the number of Shares, indicated opposite such Stockholder’s name on Schedule 1attached hereto;

WHEREAS, as an inducement and a condition to the willingness of the Company to enter into the Merger Agreement, each Stockholder has agreed to enter into and perform this Agreement; and

WHEREAS, all capitalized terms used in this Agreement without definition herein shall have the meanings ascribed to them in the Merger Agreement.

NOW, THEREFORE, in consideration of, and as a condition to, the Company’s entering into the Merger Agreement, each Stockholder, Terrain and the Company agree as follows:

26. Agreement to Vote Shares. Each Stockholder agrees that, prior to the Expiration Date (as defined in Section 2 below), at any meeting of the stockholders of Terrain or any adjournment or postponement thereof, or in connection with any written consent of the stockholders of Terrain, with respect to the Merger, the Merger Agreement or any Acquisition Proposal, such Stockholder shall:

(a) appear at such meeting or otherwise cause the Shares indicated opposite such Stockholder’s name on Schedule 1attached hereto and any New Shares (as defined in Section 3 below), other than any Shares or New Shares sold, transferred or disposed of in accordance with Section 4 below, to be counted as present thereat for purposes of calculating a quorum;

(b) vote (or cause to be voted), or deliver a written consent (or cause a written consent to be delivered) covering all of the Shares indicated opposite such Stockholder’s name on Schedule 1attached hereto and any New Shares that Stockholder shall be entitled to so vote, other than any Shares or New Shares sold, transferred or disposed of in accordance with Section 4 below: (i) in favor of the Terrain Stockholder Matters and the Equity Plan Proposals; (ii) against any Acquisition Proposal, or any agreement, transaction,

^*	This form of Support Agreement will be signed by entities affiliated with Blackstone, Inc.

matter or action that is intended to, or would reasonably be expected to, impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions; (iii) against any action or agreement that would result in a breach of any representation, warranty, covenant or obligation of Terrain in the Merger Agreement; (iv) against each of the following actions (other than the Merger and the other Contemplated Transactions): (A) any extraordinary corporate transaction, such as a merger, consolidation, amalgamation, plan or scheme of arrangement, share exchange or other business combination involving Terrain, (B) any sale, lease, sublease, license, sublicense or transfer of a material portion of the assets of Terrain that would reasonably be expected to impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions, (C) any reorganization, recapitalization, dissolution or liquidation of any Acquired Company, (D) any amendment to the Company’s Organizational Documents, which amendment would reasonably be expected to impede, interfere with, delay, postpone, discourage or materially and adversely affect the consummation of the Merger and any of the other Contemplated Transactions, and (E) any material change in the capitalization of Terrain or Terrain’s corporate structure; (v) in favor of an amendment of ▇▇▇▇▇▇▇’s Organizational Documents to adopt an exculpation provision for ▇▇▇▇▇▇▇’s officers; and (vi) to approve any proposal to adjourn or postpone the meeting to a later date, if there are not sufficient votes for the approval of the Terrain Stockholder Matters. Stockholder shall not take or commit or agree to take any action inconsistent with the foregoing.

27. Expiration Date. As used in this Agreement, the term “Expiration Date” shall mean the earlier to occur of (a) receipt of the Required Company Stockholder Vote, (b) such date and time as the Merger Agreement shall be terminated pursuant to Section 10 thereof or otherwise, (c) such date and time as a Terrain Board Adverse Recommendation Change is made, or (d) the mutual written agreement of the parties to terminate this Agreement.

28. Additional Acquisitions. Each Stockholder agrees that any shares of capital stock or other equity securities of Terrain that such Stockholder acquires or with respect to which such Stockholder otherwise acquires sole or shared voting power (including any proxy) after the execution of this Agreement and prior to the Expiration Date, whether by the exercise of any Terrain Options or Terrain SARs, or the settlement of Terrain RSUs or otherwise, including, without limitation, by gift, succession, in the event of a stock split or as a dividend or distribution of any Shares (“New Shares”), shall be subject to the terms and conditions of this Agreement to the same extent as if they constituted the Shares.

29. Agreement to Retain Shares. From and after the date hereof until the Expiration Date, each Stockholder shall not, directly or indirectly, (a) sell, assign, transfer, tender, or otherwise dispose of (including, without limitation, by the creation of any Liens (as defined in Section 5(c) below)) any Shares or any New Shares, (b) deposit any Shares or New Shares into a voting trust or enter into a voting agreement or similar arrangement with respect to such Shares or New Shares or grant any proxy or power of attorney with respect thereto (other than this Agreement), (c) enter into any Contract, option, commitment or other arrangement or understanding with respect to the direct or indirect sale, transfer, assignment or other disposition of (including, without limitation, by the creation of any Liens) any Shares or New Shares, unless

such Contract, option, commitment or other arrangement or understanding provides for a transfer or disposition of any Shares or New Shares (x) permitted by Section 4(1) through Section 4(6) and would not otherwise in any way interfere with, or be inconsistent with the obligations under this Agreement; and/or (y) that would be effective following the Expiration Date, or (d) take any action that would make any representation or warranty of such Stockholder contained herein untrue or incorrect or have the effect of preventing or disabling such Stockholder from performing such Stockholder’s obligations under this Agreement. Any action taken in violation of the foregoing sentence shall be null and void ab initio. Notwithstanding the foregoing, each Stockholder may make (1) transfers by will or by operation of Law or other transfers for estate-planning purposes, in which case this Agreement shall bind the transferee, (2) with respect to such Stockholder’s Terrain Options which expire on or prior to the Expiration Date, transfers, sale, or other disposition of Shares to Terrain, or in broker-assisted cashless exercises, as payment for the (i) exercise price of such Stockholder’s Terrain Options and (ii) taxes applicable to the exercise of such Stockholder’s Terrain Options or Terrain SARs, (3) with respect to Stockholder’s Terrain RSUs, (i) transfers for the net settlement of Stockholder’s Terrain RSUs settled in Shares (to pay any tax withholding obligations) or (ii) transfers for receipt upon settlement of such Stockholder’s Terrain RSUs, and the sale of a sufficient number of such Shares acquired upon settlement of such securities as would generate sales proceeds sufficient to pay the aggregate taxes payable by such Stockholder as a result of such settlement, (4) if such Stockholder is a partnership or limited liability company, a transfer to one or more partners or members of such Stockholder or to an Affiliated corporation, trust or other Entity under common control with such Stockholder, or if such Stockholder is a trust, a transfer to a beneficiary, provided that in each such case the applicable transferee has signed a voting agreement that is reasonably acceptable to the Company, (5) transfers to another holder of the capital stock of the Company that has signed a voting agreement that is reasonably acceptable to the Company, and (6) transfers, sales or other dispositions as the Company may otherwise agree in writing in its sole discretion. If any voluntary or involuntary transfer of any Shares covered hereby shall occur (including a transfer or disposition permitted by Section 4(1) through Section 4(6), sale by a Stockholder’s trustee in bankruptcy, or a sale to a purchaser at any creditor’s or court sale), the transferee (which term, as used herein, shall include any and all transferees and subsequent transferees of the initial transferee) shall take and hold such Shares subject to all of the restrictions, liabilities and rights under this Agreement, which shall continue in full force and effect, notwithstanding that such transferee is not a Stockholder and has not executed a counterpart hereof or joinder hereto.

30. Representations and Warranties of Stockholder. Each Stockholder hereby, severally but not jointly, represents and warrants to Terrain and the Company as follows:

such Stockholder has the legal capacity to execute and deliver this Agreement, to perform such Stockholder’s obligations hereunder and to consummate the transactions contemplated hereby;

(b) this Agreement has been duly executed and delivered by or on behalf of such Stockholder and, to such Stockholder’s knowledge and assuming this Agreement constitutes a valid and binding agreement of the Company and Terrain, constitutes a valid and binding agreement with respect to such Stockholder, enforceable against such Stockholder in accordance with its terms, except as enforcement may be limited by general principles of equity whether applied in a court of Law or a court of equity and by bankruptcy, insolvency and similar Laws affecting creditors’ rights and remedies generally;

31. [Reserved]

32. No Solicitation. From and after the date hereof until the Expiration Date, each Stockholder shall not (a) solicit, initiate or knowingly encourage, induce or facilitate the communication, making, submission or announcement of any Acquisition Proposal or Acquisition Inquiry regarding Terrain or take any action that could reasonably be expected to lead to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (b) furnish any non-public information regarding Terrain to any Person in connection with or in response to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (c) engage in discussions or negotiations with any Person with respect to any Acquisition Proposal or Acquisition Inquiry regarding Terrain, (d) approve, endorse or recommend any Acquisition Proposal (subject to Section 6.3 of the Merger Agreement), (e) execute or enter into any letter of intent or any Contract contemplating or otherwise relating to any Acquisition Transaction regarding Terrain (subject to Section 5.4 of the Merger Agreement), (f) take any action that could reasonably be expected to lead to an Acquisition Proposal or Acquisition Inquiry regarding Terrain, (g) initiate a stockholders’ vote or action by consent of the Terrain’s stockholders with respect to an Acquisition Proposal regarding Terrain, (h) except by reason of this Agreement, become a member of a “group” (as such term is defined in Section 13(d) of the Exchange Act) with respect to any voting securities of Terrain that takes any action in support of an Acquisition Proposal regarding Terrain or (i) propose or agree to do any of the foregoing. In the event that such Stockholder is a corporation, partnership, trust or other Entity, it shall not permit any of its Subsidiaries or Affiliates to, nor shall it authorize any officer, director or representative of such Stockholder, or any of its Subsidiaries or Affiliates to, undertake any of the actions contemplated by this Section 7. For the avoidance of doubt, this Section 7 shall not prohibit any Stockholder from soliciting, engaging in discussions or negotiations with any Person or entering into any Contract relating to, or effecting, the transfer of Shares or New Shares permitted by Section 4 above.

33. No Legal Actions. Each Stockholder will not in its capacity as a stockholder of Terrain bring, commence, institute, maintain, prosecute or voluntarily aid any Legal Proceeding which (i) challenges the validity or seeks to enjoin the operation of any provision of this Agreement or (ii) alleges that the execution and delivery of this Agreement by such Stockholder, either alone or together with the other voting agreements and proxies to be delivered in connection with the execution of the Merger Agreement, or the approval of the Merger Agreement and the Contemplated Transactions by the Terrain Board, constitutes a breach of any fiduciary duty of the Terrain Board or any member thereof.

34. Other Remedies; Specific Performance. Except as otherwise provided herein, any and all remedies herein expressly conferred upon a party will be deemed cumulative with and not

exclusive of any other remedy conferred hereby, or by Law or equity upon such party, and the exercise by a party of any one remedy will not preclude the exercise of any other remedy. The parties agree that irreparable damage for which monetary damages, even if available, would not be an adequate remedy, would occur in the event that any of the provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to an injunction or injunctions to prevent breaches of this Agreement and to enforce specifically the terms and provisions hereof in any court of the United States or any state having jurisdiction, this being in addition to any other remedy to which they are entitled at Law or in equity, and each of the parties waives any bond, surety or other security that might be required of any other party with respect thereto. Each of the parties further agrees that it will not oppose the granting of an injunction, specific performance or other equitable relief on the basis that any other party has an adequate remedy at Law or that any award of specific performance is not an appropriate remedy for any reason at Law or in equity.

35. Directors and Officers. This Agreement shall apply to each Stockholder solely in such Stockholder’s capacity as a stockholder of Terrain and/or holder of Terrain Options, Terrain RSUs and/or Terrain SARs and not in such Stockholder’s capacity as a director, officer or employee of Terrain or any of its Subsidiaries or in such Stockholder’s capacity as a trustee or fiduciary of any employee benefit plan or trust. Notwithstanding any provision of this Agreement to the contrary, nothing in this Agreement shall (or require Stockholder to attempt to) limit or restrict a director and/or officer of Terrain in the exercise of his or her fiduciary duties consistent with the terms of the Merger Agreement as a director and/or officer of Terrain or in his or her capacity as a trustee or fiduciary of any employee benefit plan or trust or prevent or be construed to create any obligation on the part of any director and/or officer of Terrain or any trustee or fiduciary of any employee benefit plan or trust from taking any action in his or her capacity as such director, officer, trustee and/or fiduciary.

36. No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest in the Company any direct or indirect ownership or incidence of ownership of or with respect to any Shares. All rights, ownership and economic benefits of and relating to the Shares shall remain vested in and belong to such Stockholder, and the Company does not have authority to manage, direct, superintend, restrict, regulate, govern, or administer any of the policies or operations of Terrain or exercise any power or authority to direct such Stockholder in the voting of any of the Shares, except as otherwise provided herein.

37. Termination. This Agreement shall terminate and shall have no further force or effect as of the Expiration Date. Notwithstanding the foregoing, upon termination or expiration of this Agreement, no party shall have any further obligations or liabilities under this Agreement; provided, however, nothing set forth in this Section 12 or elsewhere in this Agreement shall relieve any party from liability for any fraud or for any willful and material breach of this Agreement prior to termination hereof.

38. Further Assurances. Each Stockholder shall, from time to time, execute and deliver, or cause to be executed and delivered, such additional or further consents, documents and other instruments as the Company or Terrain may reasonably request for the purpose of effectively carrying out the transactions contemplated by this Agreement and the Contemplated Transactions.

39. Disclosure. Each Stockholder hereby agrees that Terrain and the Company may publish and disclose in the Registration Statement, any prospectus filed with any regulatory authority in connection with the Contemplated Transactions and any related documents filed with such regulatory authority and as otherwise required by Law, such Stockholder’s identity and ownership of Shares and the nature of such Stockholder’s commitments, arrangements and understandings under this Agreement and may further file this Agreement as an exhibit to the Registration Statement or prospectus or in any other filing made by Terrain or the Company as required by Law or the terms of the Merger Agreement, including with the SEC or other regulatory authority, relating to the Contemplated Transactions, all subject to prior review and an opportunity to comment by ▇▇▇▇▇▇▇▇▇▇▇’s counsel. Prior to the Closing, each Stockholder shall not, and shall use its reasonable best efforts to cause its representatives not to, directly or indirectly, make any press release, public announcement or other public communication that criticizes or disparages this Agreement or the Merger Agreement or any of the Contemplated Transactions, without the prior written consent of Terrain and the Company, provided that the foregoing shall not limit or affect any actions taken by such Stockholder (or any affiliated officer or director of such Stockholder) that would be permitted to be taken by such Stockholder, Terrain or the Company pursuant to the Merger Agreement; provided, further, that the foregoing shall not effect any actions of Stockholder the prohibition of which would be prohibited under applicable Law.

40. Notice. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly delivered and received hereunder (a) one (1) Business Day after being sent for next Business Day delivery, fees prepaid, via a reputable international overnight courier service, (b) upon delivery in the case of delivery by hand or (c) on the date delivered in the place of delivery if sent by email (with a written or electronic confirmation of delivery) prior to 6:00 p.m. New York City time, otherwise on the next succeeding Business Day, in each case to the intended recipient: (i) to the Company or Terrain, as applicable, in accordance with Section 11.7 of the Merger Agreement, and (ii) to each Stockholder at his, her or its address or email address (providing confirmation of transmission) set forth on Schedule 1 attached hereto (or at such other address for a party as shall be specified by like notice).

41. Severability. Any term or provision of this Agreement that is invalid or unenforceable in any situation in any jurisdiction shall not affect the validity or enforceability of the remaining terms and provisions of this Agreement or the validity or enforceability of the offending term or provision in any other situation or in any other jurisdiction. If a final judgment of a court of competent jurisdiction declares that any term or provision of this Agreement is invalid or unenforceable, the parties hereto agree that the court making such determination shall have the power to limit such term or provision, to delete specific words or phrases or to replace such term or provision with a term or provision that is valid and enforceable and that comes closest to expressing the intention of the invalid or unenforceable term or provision, and this Agreement shall be valid and enforceable as so modified. In the event such court does not exercise the power granted to it in the prior sentence, the parties hereto agree to replace such invalid or unenforceable term or provision with a valid and enforceable term or provision that will achieve, to the extent possible, the economic, business and other purposes of such invalid or unenforceable term or provision.

42. Assignability. This Agreement shall be binding upon, and shall be enforceable by and inure solely to the benefit of, the Parties and their respective successors and assigns; provided,

however, that neither this Agreement nor any of a Party’s rights or obligations hereunder may be assigned or delegated by such Party without the prior written consent of the other Party, and any attempted assignment or delegation of this Agreement or any of such rights or obligations by such Party without the other Party’s prior written consent shall be void and of no effect.

43. No Waivers. No waivers of any breach of this Agreement extended by the Company or Terrain to such Stockholder shall be construed as a waiver of any rights or remedies of the Company or Terrain, as applicable, with respect to any other stockholder of Terrain who has executed an agreement substantially in the form of this Agreement with respect to Shares held or subsequently held by such stockholder or with respect to any subsequent breach of Stockholder or any other such stockholder of Terrain. No waiver of any provisions hereof by any party shall be deemed a waiver of any other provisions hereof by any such party, nor shall any such waiver be deemed a continuing waiver of any provision hereof by such party.

44. Applicable Law; Jurisdiction. This Agreement shall be governed by, and construed in accordance with, the Laws of the state of Delaware, regardless of the Laws that might otherwise govern under applicable principles of conflicts of Laws. In any action or Legal Proceeding between any of the parties arising out of or relating to this Agreement, each of the parties: (i) irrevocably and unconditionally consents and submits to the exclusive jurisdiction and venue of the Court of Chancery of the state of Delaware or to the extent such court does not have subject matter jurisdiction, the Superior Court of the State of Delaware or the United States District Court for the District of Delaware, (ii) agrees that all claims in respect of such action or Legal Proceeding shall be heard and determined exclusively in accordance with clause (i) of this Section 19, (iii) waives any objection to laying venue in any such action or Legal Proceeding in such courts, (iv) waives any objection that such courts are an inconvenient forum or do not have jurisdiction over any party, and (v) agrees that service of process upon such party in any such action or Legal Proceeding shall be effective if notice is given in accordance with Section 15 of this Agreement.

45. Waiver of Jury Trial. The parties hereto hereby waive any right to trial by jury with respect to any action or Legal Proceeding related to or arising out of this Agreement, any document executed in connection herewith and the matters contemplated hereby and thereby.

46. No Agreement Until Executed. Irrespective of negotiations among the parties or the exchanging of drafts of this Agreement, this Agreement shall not constitute or be deemed to evidence a Contract, agreement, arrangement or understanding between the parties hereto unless and until (a) the Terrain Board has approved, for purposes of any applicable anti-takeover Laws and regulations and any applicable provision of the certificate of incorporation of Terrain, the Merger Agreement and the Contemplated Transactions, (b) the Merger Agreement is executed by all parties thereto, and (c) this Agreement is executed by all parties hereto.

47. Entire Agreement; Counterparts; Exchanges by Electronic Transmission. This Agreement and the other agreements referred to in this Agreement constitute the entire agreement and supersede all prior agreements and understandings, both written and oral, among or between any of the parties with respect to the subject matter hereof and thereof. This Agreement may be executed in several counterparts, each of which shall be deemed an original and all of which shall constitute one and the same instrument. The exchange of a fully executed Agreement (in counterparts or otherwise) by all parties by electronic transmission via “.pdf” shall be sufficient to bind the parties to the terms and conditions of this Agreement.

48. Amendment. This Agreement may not be amended, supplemented or modified, and no provisions hereof may be modified or waived, except by an instrument in writing signed on behalf of each party hereto; provided, however, that the rights or obligations of any Stockholder may be waived, amended or otherwise modified in a writing signed by ▇▇▇▇▇▇▇, the Company and such Stockholder.

49. Fees and Expenses. Except as otherwise specifically provided herein, the Merger Agreement or any other agreement contemplated by the Merger Agreement to which a party hereto is a party, each party hereto shall bear its own expenses in connection with this Agreement and the transactions contemplated hereby.

50. Voluntary Execution of Agreement. This Agreement is executed voluntarily and without any duress or undue influence on the part or behalf of the parties. Each of the parties hereby acknowledges, represents and warrants that (i) it has read and fully understood the Merger Agreement, including the provisions relating to the payment and allocation of the consideration to be paid to stockholders of Terrain as well as holders of Terrain Options, Terrain SARs and Terrain RSUs, this Agreement and the implications and consequences thereof; (ii) it has been represented in the preparation, negotiation, and execution of this Agreement by legal counsel of its own choice, or it has made a voluntary and informed decision to decline to seek such counsel; and (iii) it is fully aware of the legal and binding effect of this Agreement. The Stockholder has had an opportunity to review with its own tax advisors the tax consequences of the Merger and the Contemplated Transactions. The Stockholder understands that it must rely solely on its advisors and not on any statements or representations made by ▇▇▇▇▇▇▇, the Company or any of their respective agents or representatives. The Stockholder understands that such Stockholder (and not Terrain, the Company or the Surviving Corporation) shall be responsible for such Stockholder’s tax liability that may arise as a result of the Merger or the Contemplated Transactions. The Stockholder understands and acknowledges that Terrain, Parent and Merger Sub are entering into the Merger Agreement in reliance upon the Stockholder’s execution, delivery and performance of this Agreement.

28. Definition of Merger Agreement. For purposes of this Agreement, the term “Merger Agreement” refers to such agreement as amended or modified, solely to the extent such amendments or modifications (a) do not (i) change the form of consideration or (ii) change the Exchange Ratio in a manner adverse to such Stockholder, or (b) have been agreed to in writing by such Stockholder.

29. Construction.

[Remainder of Page has Intentionally Been Left Blank]

EXECUTED as of the date first above written.


[STOCKHOLDER]



Signature:

Signature Page to Terrain Support Agreement

EXECUTED as of the date first above written.


TALARIS THERAPEUTICS, INC.

By:
Name:		▇▇▇▇ ▇▇▇ ▇▇▇▇▇▇
Title:		Interim CEO, President and CFO

TOURMALINE BIO, INC.

By:
Name:
Title:

Signature Page to Terrain Support Agreement

SCHEDULE 1

Name, Address and Email
Address of Stockholder

Shares of Terrain

Common Stock

Terrain

Options

Terrain

RSUs

Terrain

SARs

TALARIS THERAPEUTICS, INC. SUPPORT AGREEMENT

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