Exhibit 10.50

THIS EMPLOYMENT AGREEMENT (Agreement) entered into as of December 14, 2007 and effective as of January 1, 2008, between CuraGen Corporation, a corporation organized under the laws of the State of
Delaware, with its principal place of business at 322 East Main Street, Branford, Connecticut (the Company), and Sean A. Cassidy (Executive) to provide for the continued employment of Executive.

WHEREAS, the Executive desires to continue to be employed by the Company, subject to the terms and conditions of this Agreement; and the Company desires
to retain the Executives services, subject to the terms and conditions of this Agreement.

THEREFORE, the Company and the Executive,
intending to be legally bound, hereby agree as follows:



|1. | Employment; Duties and Responsibilities
|-- | ---------------------------------------

A)
The Company shall employ the Executive, and the Executive shall serve the Company, as Vice President and Chief Financial Officer (CFO), with such duties and responsibilities as may be assigned to the Executive by the Chief Executive
Officer (CEO) of the Company and are typically associated with a position of that nature.

B) The Executive shall devote his
best efforts and all of his business time to the performance of his duties under this Agreement and shall perform them faithfully, diligently and competently in a manner consistent with the policies and goals of the Company as determined from time
to time by the CEO or an officer of the Company.

C) The Executive shall report to the CEO of the Company, or identified member of the
Executive Committee.



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D) The Executive shall not engage in any activities outside the scope of his employment that would
detract from, or interfere with, the fulfillment of his responsibilities or duties under this Agreement.

E) The Executive shall not serve
as a director (or the equivalent position) of any company or entity and shall not render services of a business, professional or commercial nature to any other person or firm, except for not-for-profit entities, without prior written consent of the
CEO. Such consent shall not be unreasonably withheld.

F) The Executive shall not receive fees or other remuneration for work performed
either within or outside the scope of his employment without prior written consent of the CEO. Such consent shall not be unreasonably withheld.



|2. | Term of Employment
|-- | ------------------

The Executives
employment pursuant to this Agreement shall be effective as of January 1, 2008. The Executive is employed on an at-will basis, and, subject to the provisions of Section 9 and 11, either the Executive or the Company may terminate the
employment relationship at any time for any reason.



|3. | Compensation
|-- | ------------

As full compensation for all
services rendered by the Executive to the Company under this Agreement, the Company shall pay the Executive the compensation set forth in Schedule A attached and incorporated into this Agreement. This schedule may be amended from time to time in
writing by the Company and the Executive.



|4. | Fringe Benefits
|-- | ---------------

A) Fringe Benefits:
The Executive shall be entitled to participate in employee benefit plans which the Company provides or may establish for the benefit of its senior executives



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generally (for example, group life, disability, medical, dental and other insurance, retirement, pension, profit-sharing and similar plans) (collectively,
the Fringe Benefits). Eligibility to participate in the Fringe Benefits and receive benefits thereunder is subject to the plan documents governing such Fringe Benefits. Nothing contained herein shall require the Company to establish or
maintain any Fringe Benefits, and such Fringe Benefits may be modified from time to time in the Companys discretion.

B)
Vacation: The Executive shall be entitled to accrue on an annual basis 20 paid vacation days in accordance with the Companys policies as in effect from time to time. All vacation days will be taken at times selected by him, with the
prior approval of the person to whom the Executive is to report.

C) Directors and Officers Insurance: The Executive
shall be covered under the Companys directors and officers insurance coverage to the same extent as other officers of the Company.



|5. | Expenses
|-- | --------

The Company shall reimburse the
Executive for all reasonable and necessary expenses incurred by him in connection with the performance of his services for the Company in accordance with the Companys policies, upon submission of appropriate expense reports and documentation
in accordance with the Companys policies and procedures.



|6. | Patents, Copyrights and Intellectual Property
|-- | ---------------------------------------------

A) The Executive shall promptly disclose to the Company all Inventions. Inventions shall mean, for purposes of this paragraph, inventions, discoveries, developments, methods and processes (whether or not patentable or copyrightable or
constituting trade secrets) conceived, made or discovered by the Executive (whether alone or with others) while employed by the



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Company that relate, directly or indirectly, to the past, present, or future business activities, research, product design or development, personnel, and
business opportunities of the Company, or result from tasks assigned to the Executive by the Company or done by the Executive for or on behalf of the Company or any affiliate, subsidiary, division or parent of the Company (collectively with the
Company, the Company Group). The Executive hereby assigns and agrees to assign to the Company (or as otherwise directed by the Company) his full right, title and interest in and to all Inventions. The Executive agrees to execute any and
all applications for domestic and foreign patents, copyrights or other proprietary rights and to do such other acts (including, among others, the execution and delivery of instruments of further assurance or confirmation) requested by the Company to
assign the Inventions to the Company and to permit the Company to file, obtain and enforce any patents, copyrights or other proprietary rights in the Inventions. The Executive agrees to make and maintain adequate and current records of all
Inventions, in the form of notes, sketches, drawings, or reports relating thereto, which records shall be and remain the property of and available to the Company at all times.

B) All designs, ideas, inventions, improvements, and other creations made or owned by the Executive before becoming an employee of the Company and which
the Executive desires to exempt from this Agreement are listed on Attachment A hereof and authorized for exclusion by the signature of an Officer of the Company. (If the Executive does not have any such designs, ideas, inventions, improvements, or
other creations write none on this line: .)

C) The Executive agrees to
notify the Company in writing before the Executive makes any disclosure or performs or causes to be performed any work for or on behalf of the Company, which appears to threaten or conflict with (a) rights the Executive claims in any invention
or idea conceived by the Executive or others (i) prior to the Executives employment,



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or (ii) otherwise outside the scope of this Agreement; or (b) rights of others arising out of obligations incurred by the Executive (i) prior
to this Agreement, or (ii) otherwise outside the scope of this Agreement. In the event of the Executives failure to give notice under the circumstances specified, the Company may assume that no such conflicting invention or idea exists
and the Executive agrees that the Executive will make no claim against the Company with respect to the use of any such invention or idea in any work which the Executive performs or causes to be performed for or on behalf of the Company.



|7. | Proprietary and Trade Secret Information
|-- | ----------------------------------------

A)
The Executive agrees that he will keep confidential and will not make any unauthorized use or disclosure, or use for his own benefit or the benefit of others, during or subsequent to his employment of any research, development, engineering and
manufacturing data, plans, designs, formulae, processes, specifications, techniques, trade secrets, financial information, customer or supplier lists or other information that becomes known to him as a result of his employment with the Company which
is the property of any member of the Company Group or any of its clients, customers, consultants, licensors, or licensees, provided nothing herein shall be construed to prevent the Executive from using his general knowledge and skill after
termination of his employment whether acquired prior to or during his employment by the Company.

B) Proprietary information subject to
paragraph 7(A) does not include information that: (i) is or later becomes available to the public through no breach of this Agreement by the Executive; (ii) is obtained by the Executive from a third party who had the legal right to
disclose the information to the Executive; or (iii) is required to be disclosed by law, government regulation, or court order.



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C) During the course of his employment with the Company, the Executive will not accept information from
sources outside of the Company, which is designated as Confidential, or Proprietary, or Trade Secret without prior written permission from the Company or its attorneys. The Executive is not expected to and is
expressly forbidden by the Company policy from disclosing to the Company a Trade Secret or Confidential or Proprietary information from a former employer.

D) Upon leaving the employment of the Company, the Executive will not remove from the Company Groups premises, either directly or indirectly, any
drawings, writings, prints, any documents or anything containing, embodying, or disclosing any confidential or proprietary information or any of the Company Groups trade secrets unless express written permission is given by the Company
management. Upon termination of his employment, the Executive shall return to the Company any and all documents and materials that are the property of any member of the Company Group or its customers, licensees, licensors or affiliates or which
contain information that is the property of any member of the Company Group.



|8. | Covenant Not to Compete
|-- | -----------------------

A) While in the
employ of the Company and for a period of one year or the maximum period permitted by applicable law (whichever is shorter) following termination of his employment with the Company, the Executive shall not, without the approval of the Company, alone
or as a partner, officer, director, consultant, employee, stockholder or otherwise, engage in any employment, consulting or business activity or occupation that is or is intended to be directly competitive with the business of the Company, as being
considered, researched, developed, marketed and/or sold at the time of termination; provided, however, that the holding by the Executive of any investment in any security shall not be deemed to be a violation of this section



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if such investment does not constitute over one percent (1%) of the outstanding issue of such security. The restriction shall run for a period of one
year after said termination, and if there shall be any violation hereof during said period, then for a period of one year after cessation of such violation.

B) The Executive shall not, directly or indirectly, either during the term of the Executives employment under this Agreement or for a period of one (1) year thereafter, solicit or attempt to solicit,
directly or indirectly, the services of any person who was a full-time employee of any member of the Company Group or solicit or attempt to solicit the business of any person who was a client or customer of any member of the Company Group at any
time during the last year of the term of the Executives employment under this Agreement. The Executive shall not, directly or indirectly, either during the term of the Executives employment under this Agreement or for a period of one
(1) year thereafter, employ or attempt to employ, directly or indirectly, the services of any person who was a full-time employee of any member of the Company Group, or solicit the business of any person who was a client or customer of any
member of the Company Group at any time during the last year of the term of the Executives employment under this Agreement. For purposes of this Agreement, the term person shall include natural persons, corporations, business
trusts, associations, sole proprietorships, unincorporated organizations, partnerships, joint ventures and governments or any agencies, instrumentalities or political subdivisions thereof.

C) The Executive acknowledges and agrees that the covenants in this section are necessary for the protection of the legitimate business interests of the
Company and that the covenants are reasonable in all respects. The Executive further acknowledges and agrees that, if his employment by the Company is terminated, his experience and capabilities are such that he is



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both qualified and willing to seek and obtain employment involving business activities which will not violate any covenant on his part to be observed
hereunder and that a court decree enjoining any such violation will not prevent him from earning a reasonable livelihood.

D) Just
compensation for the duties under this paragraph is included in the salary and benefits provided herein.

E) If the Executive is terminated
as a result of a Change of Control, as defined in this Agreement, this Section, titled Covenant Not to Compete, shall not be applicable.

F) The parties agree that if any provision of this Section 8 is held invalid or unenforceable by a court of competent jurisdiction, that part should be modified by the court to make it enforceable to the maximum
extent possible. If the part cannot be modified, then that part may be severed and the other parts of this Agreement shall remain enforceable.



|9. | Termination
|-- | -----------

A) The Company shall have the
right to terminate the Executives employment with the Company at any time for any reason, including for Executives Disability, Performance Reasons or with or without Cause (all terms as defined in this Agreement).

B) The Executives employment shall terminate automatically upon his death.

C) The Executive shall have the right to terminate the Executives employment with the Company at any time for any reason, including with Good
Reason (as that term is defined in this Agreement).

D) For purposes of this Agreement, the term Performance Reasons shall mean
termination of the Executives employment upon the assessment of the Chief Executive Officer, or the Board of Directors, or a Committee of the Board of Directors that the Executive has failed to satisfactorily perform the essential functions of
the Executives position. Such a determination shall be made using acceptable business practices and sound management principles and shall not be made in bad faith or arbitrarily.



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E) For purposes of this Agreement, the term Cause shall mean the Executives willfully
engaging in conduct demonstrably and materially injurious to the Company, monetarily or otherwise, provided that the Executive receives a copy of a resolution duly adopted by the unanimous affirmative vote of the entire disinterested membership of
the Board of Directors of the Company (BOD) at a meeting of the BOD called and held for such purpose after the Executive has been given reasonable notice of such meeting and has been given an opportunity, together with his counsel, to be
heard by the Board of the Company, finding that in the good faith opinion of the Board of the Company the Executive was guilty of the conduct set forth and specifying the particulars thereof in detail.

F) The Executives act, or failure to act, shall be deemed willful if the Executive was not acting in good faith or acting without
reasonable belief that the Executives action or omission was in the best interests of the Company. Any act or failure to act based on authority given pursuant to a resolution duly adopted by the Board of the Company, or based upon the advice
of counsel for the Company shall be conclusively presumed to have been done by the Executive in good faith and in the best interests of the Company.

G) For purposes of this Agreement, Disability shall mean (A) Executive is unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment
which can be expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months, or (B) Executive is, by reason of any medically determinable physical or mental impairment which can be
expected to result in death or can be expected to last for a continuous period of not less than twelve (12) months, receiving



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income replacement benefits for a period of not less than three (3) months under a Company-sponsored group disability plan. A determination of
Disability shall be made in good faith by a majority vote of the Board, based on the opinion of one or more physicians mutually agreed to by Executive and the Company.

H) For the purposes of this Agreement, termination by the Executive of his employment for Good Reason shall mean termination based on:

(i) subsequent to a Change in Control of the Company (as hereafter defined), and without the Executives express written consent, any
material reduction in Executives duties or responsibilities compared to those prior to a Change in Control, or a material change in the Executives reporting responsibilities, titles or offices as in effect immediately prior to a Change
in Control, or any material removal of the Executive from, or any material failure to re-elect the Executive, to any of his previously held positions with the Company, except in connection with the termination of the Executives employment for
Cause, Disability or Retirement or as a result of the Executives death or by the Executive other than for Good Reason;

(ii) subsequent to a Change in Control of the Company, a reduction by the Company in the Executives base salary as in effect on the date hereof or as the same may be increased from time to time;

(iii) subsequent to a Change in Control of the Company, a failure by the Company to continue any bonus plans in which the Executive is
presently entitled to participate (the Bonus Plans) as the same may be modified from time to time but substantially in the form currently in effect, or a failure by the Company to continue the



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Executive as a participant in the Bonus Plans on at least the same basis as the Executive presently participates in accordance with the Bonus Plans;

(iv) subsequent to a Change in Control of the Company and without the Executives express written consent, the
Companys requiring the Executive to be based anywhere other than within fifty (50) miles of the Executives present office location, except for required travel on the Companys business to an extent substantially consistent with
the Executives present business travel obligations;

(v) subsequent to a Change in Control of the Company, the taking
of any action by the Company which would adversely affect the Executives participation in or materially reduce the Executives benefits under any benefit plans or deprive the Executive of any material fringe benefit enjoyed by the
Executive at the time of the Change in Control, or the failure by the Company to provide the Executive with the number of paid vacation days to which the Executive is then entitled in accordance with the Companys normal vacation policy in
effect on the date hereof; or

(vi) subsequent to a Change in Control of the Company, any purported termination of the
Executives employment which is not effected pursuant to the terms of this Agreement. No such purported termination shall be effective.



|10. | Change in Control
|--- | -----------------

A) Change in
Control of the Company shall mean the occurrence of any one of the following events with respect to the Company, but only to the extent each of the following is interpreted in a manner consistent with the meaning of a change in the
ownership or effective control of the corporation, or in the ownership of a substantial portion of the assets of the corporation under Section 409A of Internal Revenue Code, as amended, (the Code



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Section 409A) and any successor statute, regulation and guidance thereto, and limited to the extent necessary so that it will not cause adverse
tax consequences with respect to Code Section 409A:

(i) such time as the majority of the members of the BOD is
replaced during any 12-month period (commencing no earlier than the Commencement Date) by directors whose appointment or election is not endorsed by a majority of the members of the BOD prior to the date of appointment or election;

(ii) the acquisition by any Person (as such term is defined in Section 3(a)(9) of the Securities Exchange Act of 1934
(the Exchange Act) and as used in Section 13(d)(3) and 14(d)(2) of the Exchange Act) of the beneficial ownership of any capital stock of the Company if, after such acquisition, such person beneficially owns (within the meaning of
Rule 13d-3 under the Exchange Act) more than 50% of the combined voting power of the Companys then outstanding securities eligible to vote for the election of the BOD (the Company Voting Securities); provided, however, that the
event described in this paragraph (ii) shall not be deemed to be a Change in Control by virtue of any of the following: (a) an acquisition by the Company or any subsidiary of the Company; (b) an acquisition by any employee benefit
plan sponsored or maintained by the Company or subsidiary of the Company; (c) an acquisition by any underwriter temporarily holding securities pursuant to an offering of such securities; or (d) an acquisition by any Person who, prior to
such acquisition, already owned more than 50% of the Company Voting Securities;

(iii) the consummation of a merger,
consolidation, statutory share exchange, a sale or other disposition of all or substantially all of the assets of the Company or similar



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form of corporate transaction involving the Company (a Business Combination), unless immediately following such Business Combination at least 50%
of the total voting power of (x) the corporation resulting from such Business Combination (the Surviving Corporation), or (y) if applicable, the ultimate parent corporation that directly or indirectly has beneficial ownership
of 100% of the voting securities eligible to elect directors of the Surviving Corporation, is represented by Company Voting Securities that were outstanding immediately prior to such Business Combination (or, if applicable, shares into which such
Company Voting Securities were converted pursuant to such Business Combination); or

(iv) the stockholders of the Company
approve a plan of complete liquidation or dissolution of the Company, but only if such approval is in connection with one of the events described in Section 10(A)(i)-(iii) above.

B) Notwithstanding the foregoing, a Change in Control of the Company shall not be deemed to occur solely because any Person acquires beneficial ownership
of more than 50% of the Company Voting Securities as a result of the acquisition of Company Voting Securities by the Company which reduces the number of Company Voting Securities outstanding.

C) Upon a Change of Control, notwithstanding any other agreement, all stock, restricted stock, stock options or restricted stock options of the Executive
shall become fully vested to 100%.



|11. | Benefits Upon Termination
|--- | -------------------------

A) If the
Executives employment is terminated by the Company for Cause or by the Executive without Good Reason, the Company shall not be obligated to make any further payment to the Executive (other than accrued and unpaid base salary and expenses to
the date of



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termination), or continue to provide any benefit (other than benefits which have accrued pursuant to any plan or by law) to the Executive under this
Agreement. Accrued and unpaid base salary, expenses, and benefits which have accrued pursuant to any plan or by law are hereinafter referred to as Accrued Obligations.

B) If the Executive is terminated for Performance Reasons, then, in addition to the Accrued Obligations, Executive shall be entitled to: (i) salary
continuation at the salary the Executive was receiving at the time of termination for a period of six (6) months following termination; and (ii) upon timely election of COBRA continuation coverage, the Executives continued
participation in any employee health and welfare benefit plan to which the Executive was a participant prior to his termination, with the Company premiums paid at the same percentage as when the Executive had participated as an employee, for up to
six (6) months following termination; provided, that the Companys obligation to continue the Executives participation in any employee health and welfare benefit plan shall case as of the date the Executive becomes eligible to
participate in a similar benefit from another source. All payments shall begin as soon as practicable following the effective date of the separation agreement set forth in Section 11(E) below.

C) If the Executives employment is terminated by the Company for Disability, or without Cause, if employment terminates because of the
Executives death, or if the Executive terminates his employment for Good Reason, then, in addition to the Accrued Obligations, Executive shall be entitled to: (i) salary continuation at the salary the Executive was receiving at the time
of termination for a period of twelve (12) months following termination; and (ii) upon timely election of COBRA continuation coverage, the Executives continued participation in any employee health and welfare benefit plan to which
the Executive was a participant prior to



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his termination, with the Company premiums paid at the same percentage as when the Executive had participated as an employee, for up to twelve
(12) months following termination; provided, that the Companys obligation to continue the Executives participation in any employee health and welfare benefit plan shall cease as of the date that the Executive becomes eligible
to participate in a similar benefit from another source. All payments shall begin as soon as practicable following the effective date of the separation agreement set forth in Section 11(E) below.

D) Notwithstanding any other provision with respect to payments under Section 11(B), if the Executives employment is terminated by the Company
within twelve (12) months of a Change of Control for reasons other than Cause, Disability, or his death or if the Executive terminates his employment for Good Reason within twelve (12) months of a Change of Control, then, in lieu of the
payments set forth in paragraph (C), the Executive shall be entitled to (i) salary continuation at the salary the Executive was receiving at the time of termination for a period of twenty-four (24) months following termination;
(ii) an amount equal to two times the Executives target annual bonus, paid in a lump sum; and (iii) upon timely election of COBRA continuation coverage, the Executives continued participation, subject to COBRA, in any employee
health and welfare benefit plan to which the Executive was a participant prior to his termination, with the Company premiums paid at the same percentage as when the Executive had participated as an employee, for up to twenty-four (24) months
following termination; provided that, if COBRA continuation coverage is otherwise earlier terminated under applicable law, then, in lieu of coverage, the Company will pay its share of the monthly Company premium in effect prior to the termination of
COBRA continuation coverage directly to the Executive each month for the remainder of the relevant period. All payments shall begin as soon as practicable following the effective date of the separation agreement set forth in Section 11(E)
below.



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E) All payments and benefits set forth in Sections 11(B)-(D) are contingent upon the
Executives execution (without revocation) of a separation agreement that is in a form acceptable to the Company and contains a full waiver and release of claims against the Company, within twenty-one (21) days of the date such separation
agreement is provided to the Executive.

F) Notwithstanding any other provision with respect to the timing of payments under Sections
11(A)-(D), as applicable, if, at the time of the Executives termination, the Executive is deemed to be a specified employee (within the meaning of Code Section 409 A, and any successor statute, regulation and guidance
thereto) of the Company, then only to the extent necessary to comply with the requirements of Code Section 409A, any payments to which the Executive may become entitled under Sections 11(A)-(D), as applicable, will be withheld until the first
business day of the seventh month following the termination of the Executives employment, at which time the Executive shall be paid an aggregate amount equal to six months of payments otherwise due to the Executive under the terms of Sections
11(A)-(D), as applicable. After the first business day of the seventh month following the termination of the Executives employment and continuing each month thereafter, the Executive shall be paid the regular monthly payments otherwise due to
the Executive in accordance with the terms of Sections 11(A)-(D), as applicable. In addition, in the event that the Company is obligated to make cash payments directly to the Executive in lieu of COBRA continuation coverage pursuant to the terms of
Section 11(D), then, to the extent necessary to comply with the requirements of Code Section 409A, such cash payments will be withheld, if applicable, in the same manner as described above in this paragraph.



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|12. | Arbitration
|--- | -----------

A) Any dispute under this
Agreement, including any dispute as to cause or good reason for termination, shall be submitted to binding arbitration subject lo the rules of the American Arbitration Association. EACH OF THE PARTIES IRREVOCABLY AND UNCONDITIONALLY WAIVES THE RIGHT
TO A TRIAL BY JURY IN ANY SUCH ACTIONS, SUIT OR PROCEEDING. The Company shall bear all costs associated with the Arbitration, including filing fees and any stipend for the arbitrator. The Company and the Executive shall each bear its own
attorneys fees. However, if the Executive prevails in a challenge to the Companys determination for cause, the Executive shall be entitled to be reimbursed for all attorney fees.

B) Nothing in this section shall be read to preclude the Company seeking injunctive relief for the Executives breach of Section 7, Proprietary
and Trade Secret Information or Section 8, Covenant Not to Compete.



|13. | Injunctive Relief
|--- | -----------------

The Executive
acknowledges that the services rendered by him under this Agreement are of a special, unique and extraordinary character and, in connection with such services, he will have access to confidential information concerning the Companys business.
By reason of this access to confidential information, the Executive consents and agrees that if he violates any of the provisions of this Agreement with respect to Proprietary and Trade Secret Information or the Covenant Not to Compete, the Company
would sustain irreparable harm and, therefore, in addition to any other remedies which the Company may have under this Agreement or otherwise, the Company shall be entitled to an injunction to be issued by any court of competent jurisdiction
restraining the Executive from committing or continuing to commit any such violation of this Agreement.



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|14. | Miscellaneous
|--- | -------------

A) This Agreement shall be
governed by and construed in accordance with the laws of the State of Connecticut, applicable to agreements made and to be performed in Connecticut, and shall be construed without regard to any presumption or other rule requiring construction
against the party causing the Agreement to be drafted.

B) This Agreement contains a complete statement of all the arrangements between the
Company and the Executive with respect to its subject matter, supersedes all previous agreements, written or oral, among them relating to its subject matter and cannot be modified, amended or terminated orally. Amendments may be made to this
Agreement at any time if mutually agreed upon in writing.

C) Any amendment, notice or other communication under this Agreement shall be in
writing and shall be considered given when received and shall be delivered personally or mailed by Certified Mail, Return Receipt Requested, to the parties at their respective addresses set forth in this Agreement, or at such other address as a
party may specify by written notice to the other.

D) The failure of a party to insist upon strict adherence to any term of this Agreement
on any occasion shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Agreement. Any waiver must be in writing.

E) Each of the parties irrevocably submits to the exclusive jurisdiction of any court of the State of Connecticut or the Federal District Court of
Connecticut over any action, suit or proceeding relating to or arising out of this Agreement and the transactions contemplated hereby.



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Each party hereby irrevocably waives any objections, including, without limitation, any objection to the laying of venue or based on the grounds of forum
non convenienswhich such party may now or hereafter have to the bringing of any such actions, suit or proceeding in any such court and irrevocably agrees that process in any such actions, suit or proceeding may be served upon that party
personally or by Certified or Registered Mail, Return Receipt Requested.

F) The invalidity or unenforceability of any term or provision of
this Agreement shall not affect the validity or enforceability of the remaining terms or provisions of this Agreement which shall remain in full force and effect and any such invalid or unenforceable term or provision shall be given full effect as
is legally permissible. If any term or provision of this Agreement is invalid or unenforceable in one jurisdiction, it shall not affect the validity or enforceability of that term or provision in any other jurisdiction.

G) This Agreement is not assignable by either party except that it shall inure to the benefit of and be binding upon any successor to the Company by
merger or consolidation or the acquisition of all or substantially all of the Companys assets, provided such successor assumes all of the obligations of the Company, and shall inure to the benefit of the heirs and legal representatives of the
Executive.

H) The Executive hereby acknowledges and agrees that the Company makes no representations or warranties regarding the tax
treatment or tax consequences of any compensation, benefits or other payments under the Agreement, including, without limitation, by operation of Code Section 409A, or any successor statute, regulation and guidance thereto. Notwithstanding the
foregoing, in the event it shall be determined that any payment, award, benefit or distribution by the Company to or for the benefit of the Executive would be subject to Section 280G of the Internal Revenue Code of 1986, as amended, (the
Code) or the excise



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tax imposed by Section 4999 of the Code or any corresponding provisions of state or local tax laws as a result of a payment to Executive upon a change
of control, or any interest or penalties are incurred by Executive with respect to such excise tax (such excise tax, together with any such interest and penalties, are hereinafter collectively referred to as the Excise Tax), the
Executive shall receive the greater of (i) the total value of the payments to be paid to Executive upon a change of control reduced to an amount that shall avoid triggering the Excise Tax or (ii) the total value of the payments to be paid
to Executive upon a change in control with the application of the Excise Tax.

I) The Company and the Executive agree that they will
negotiate in good faith and jointly execute an amendment to modify this Agreement to the extent necessary to comply with the requirements of Code Section 409A, or any successor statute, regulation and guidance thereto; provided that no such
amendment shall increase the total financial obligation of the Company under this Agreement.



|    |  |                                                                                                                                                   |  |              |  |     |  |                                                                                                          |  |          |  | 
|--- |  | ------------------------------------------------------------------------------------------------------------------------------------------------- |  | ------------ |  | --- |  | -------------------------------------------------------------------------------------------------------- |  | -------- |  | 
|    |  |                                                                                                                                                   |  |              | 
|By: |  | /s/ Timothy M. Shannon                                                                                                                            |  | Dec 14, 2007 |  | By: |  | /s/ Sean A. Cassidy                                                                                      |  | 12/14/07
|    |  | Timothy M. Shannon President and Chief Executive Officer CuraGen Corporation 322 East Main Street Branford, CT 06405 (on behalf of the Company) |  |              |  |     |  | Sean A. Cassidy VP and CFO CuraGen Corporation 322 East Main Street Branford, CT 06405 (the Executive) |  | Date    



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SCHEDULE A

Compensation

The Executive shall receive the following compensation for services during the initial term of
employment:



| | 1) | The Executives base salary shall be $175,000 per year, payable in bi-weekly installments, subject to increases by the Board of Directors, which shall review the salary
periodically.
| | -- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 2) | The Executive, if otherwise eligible, shall participate in any incentive compensation plan, pension, profit sharing, stock purchase or stock option plan, annuity, or group insurance
plan, medical plan and other benefits, maintained by the Company for its employees.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| | 3) | The Executive shall be eligible to receive annual performance-based bonuses based on the attainment of goals set by the Chief Executive Officer. The Executives non-equity
bonus shall be 25% of base salary at target.
| | -- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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