Prepared by R.R. Donnelley Financial -- EX-10.13




 Exhibit 10.13 

THIS EXHIBIT HAS BEEN REDACTED AND IS THE SUBJECT OF A CONFIDENTIAL TREATMENT REQUEST. REDACTED MATERIAL IS MARKED WITH [* * *] AND HAS BEEN
FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. 
 ASSIGNMENT AGREEMENT 

BY AND BETWEEN 

VIROBAY, INC. 
 AND

 APPLERA CORPORATION 

June 2, 2006 








 ASSIGNMENT AGREEMENT 

THIS ASSIGNMENT AGREEMENT (the “Agreement”), effective as of June 2,
2006 (“Effective Date”), is by and between Virobay, Inc., a Delaware corporation having its principal place of business at 345 California Street, Suite 2600, San Francisco, CA 94104 (“Virobay”) and
APPLERA CORPORATION, a Delaware corporation, by and through the CELERA GENOMICS GROUP having its principal place of business at 45
West Gude Drive, Rockville, Maryland 20850 (“Celera”). Celera and Virobay are sometimes referred to herein individually as a “Party” and collectively as the “Parties”. 

RECITALS 

WHEREAS, Celera has been conducting research directed to the discovery and development of small molecule
compounds as therapeutic agents for the treatment of Hepatitis C Virus (HCV) infection, and has identified multiple small molecule compounds in various stages of development, and has developed proprietary technologies and know-how relating to
discovery and development of small molecule HCV inhibitors as therapeutic agents; and 
 WHEREAS,
Virobay desires to acquire, and Celera wishes to sell to Virobay, all proprietary technologies and know-how that relate to its HCV small molecule inhibitor programs, including but not limited to, the multiple HCV polymerase and protease inhibitors
in various stages of development, and intellectual property and know-how relating to discovery, manufacture and development of small molecule HCV inhibitors as therapeutic agents, on the terms and conditions set forth herein. 

NOW THEREFORE, based on the foregoing premises and the mutual covenants and obligations
set forth below, the Parties agree as follows: 
 ARTICLE 1 

DEFINITIONS 
 The
following terms have the following meanings as used in this Agreement: 
 1.1 “Active Component” means any product other
than an Assigned Product which performs an identifiable therapeutic or prophylactic function when combined with an Assigned Product. 

1.2 “Affiliate” means a Person that, directly or indirectly, through one or more intermediaries, controls, is controlled by
or is under common control with Celera or Virobay. For purposes of this definition, “control” means the possession, direct or indirect, of the power to cause the direction of the management and policies of a Person, whether through
ownership of fifty percent (50%) or more of the voting securities of such Person, by contract or otherwise. 








 1.3 “Assigned Product” means any product 

(a) that comprises 

(i) any Celera Material, or 

(ii) an active ingredient of which is a small molecule and the principal mechanism of action of which is through inhibition of HCV
polymerase or protease, 
 and 

(b) that the manufacture, use, sale, offer for sale or import of which is covered by an issued claim of a Celera Patent or a Virobay
Patent. 
 1.4 “Bulk Form” means (a) bulk active pharmaceutical ingredient, (b) with respect to biologics, bulk
drug substance (whether formulated or not) of the applicable product, or (c) any pharmaceutical ingredient that as sold cannot be used or distributed without further processing, combination with other Active Components or inactive components or
packaging into Dosage Form. 
 1.5 “Celera Intellectual Property” means Celera Material, Celera Patents and Celera
Technology. 
 1.6 “Celera Material” means small molecule inhibitors of HCV polymerase or protease synthesized by or on
behalf of Celera pursuant to Celera Programs, clinical formulations thereof, and backup compounds, that are in the possession of Celera, including, without limitation, those compounds in solid form as listed on Exhibit 1.6.

 1.7 “Celera Patent(s)” means any and all Patents that claim Celera Technology, including without limitation, the
Patents listed in Exhibit 1.7. 
 1.8 “Celera Programs” means the research activities conducted
by Celera prior to the Effective Date directed to the discovery and development of small molecule inhibitors of HCV polymerase and protease as therapeutic agents. 

1.9 “Celera Technology” means any and all Technology owned or Controlled by Celera as of the Effective Date that is directed
solely to the Celera Programs. 
 1.10 “Combination Product” means a product that contains an Assigned Product and
one or more other Active Components. 
 1.11 “Commercialize” or “Commercialization” means those activities
relating to the promotion, marketing and sale of Assigned Products or Combination Products and will include without limitation, Phase 4 clinical trials or equivalent clinical trials conducted following Regulatory Approval to market a pharmaceutical
product. 
 1.12 “Commercially Reasonable Efforts” means the level of efforts and resources required to be expended
in respect of an Assigned Product or a Combination Product in a sustained manner consistent with the efforts a similarly situated biopharmaceutical company would typically devote to a product of similar market potential, profit potential or
strategic value resulting from its own research and development efforts, based on conditions then prevailing and 

  
 2. 









 
taking into account efficacy, safety, approved labeling, the competitiveness of alternative products in the marketplace, the patent and other proprietary positions of the product, and the
likelihood of regulatory approval. Commercially Reasonable Efforts will be determined on a country-by-country (each country including its territories) basis for a particular Assigned Product or a Combination Product, and it is anticipated that the
level of effort will change over time reflecting changes in the status of the Assigned Product or the Combination Product and the country (including its territories) involved. 

1.13 “Confidential Information” means all information received by either Party (“Receiving Party”) from the
other Party (“Disclosing Party”) pursuant to this Agreement, other than that portion of such information or materials which the Receiving Party can establish by direct evidence: 

(a) is publicly disclosed by the Disclosing Party, either before or after it becomes known to the Receiving Party; 

(b) was known to the Receiving Party, without obligation to keep it confidential, prior to when it was received from the Disclosing
Party; 
 (c) is subsequently disclosed to the Receiving Party by a Third Party lawfully in possession thereof without obligation to
keep it confidential; 
 (d) has been publicly disclosed other than by the Disclosing Party and without breach of an obligation of
confidentiality with respect thereto; or 
 (e) has been independently developed by the Receiving Party without the aid, application
or use of Confidential Information, as demonstrated by competent written proof. 
 Specific aspects or details of Confidential Information will not be
deemed to be within the public knowledge or in the prior possession of the Receiving Party merely because the aspects or details of the Confidential Information are embraced by general disclosures in the public domain. In addition, any combination
of Confidential Information will not be considered in the public knowledge or in the prior possession of the Receiving Party merely because individual elements thereof are in the public domain or in the prior possession of the Receiving Party unless
the combination and its principles are in the public knowledge or in the prior possession of the Receiving Party. Confidential Information will include information received in confidence by the Disclosing Party from a Third Party. Prior to
disclosure of such Third Party Confidential Information to the Receiving Party the Disclosing Party will determine that it has the right to make such disclosure, advise the Receiving Party that the disclosure includes Third Party Confidential
Information and provide the Receiving Party with the terms and conditions of any agreement between the Third Party and the Disclosing Party respecting such Third Party Confidential Information. Notwithstanding anything to the contrary herein, all
Confidential Information, except to the extent publicly disclosed as of the Effective Date or thereafter disclosed by Virobay, relating solely to the Celera Programs or any Celera Intellectual Property will be deemed to be Confidential Information
of Virobay, and Virobay shall be deemed the “Disclosing Party” and Celera shall be deemed the “Receiving Party” for purposes of any such Confidential Information. 

  
 3. 









 1.14 “Control” means, with respect to Patents, Technology and other tangible and
intangible property, possession of the ability to disclose, to license or to assign as provided for in this Agreement without violating the terms of any agreement or other arrangement with any Third Party and without any obligation to make payments
to a Third Party for such disclosure, license or assignment. 
 1.15 “Dollar” means a United States dollar, and
“$” will be interpreted accordingly. 
 1.16 “Dosage Form” means a pharmaceutical product that as sold is
in individual dosage amounts and in the form approved for sale to end users. 
 1.17 “Drug Approval Application”
means an application for Regulatory Approval required before clinical trials or commercial sale or use of an Assigned Product or a Combination Product as a drug or to treat a particular indication in a regulatory jurisdiction, including without
limitation applications to expand the label of an approved drug. 
 1.18 “Effective Date” means the date set forth
above in the first paragraph of this Agreement. 
 1.19 “EMEA” means the European Medicines Evaluation Agency or any
successor agency thereof. 
 1.20 “EU” means the European Union as constituted on the Effective Date. 

1.21 “First Commercial Sale” means, with respect to a particular country and an Assigned Product or a Combination Product,
the first sale to a Third Party of the Assigned Product or the Combination Product in such country after Regulatory Approval has been obtained in such country. 

1.22 “FDA” means the United States Food and Drug Administration, or any successor thereto. 

1.23 “Force Majeure” means any occurrence beyond the reasonable control of a Party that prevents or substantially interferes
with the performance by the Party of any of its obligations hereunder, if such occurs by reason of any act of God, flood, fire, explosion, breakdown of plant, earthquake, strike, lockout, labor dispute, casualty or accident, or war, revolution,
civil commotion, acts of public enemies, blockage or embargo, or any injunction, law, order, proclamation, regulation, ordinance, demand or requirement of any government or of any subdivision, authority or representative or any such government,
inability to procure or use materials, labor, equipment, transportation, or energy sufficient to meet manufacturing needs without the necessity of allocation, or any other cause whatsoever, whether similar or dissimilar to those above enumerated,
beyond the reasonable control of such Party, if and only if the Party affected used reasonable efforts to avoid such occurrence and to remedy it promptly if it occurred. 

1.24 “GAAP” means United States generally accepted accounting principles. 

  
 4. 









 1.25 “Licensee” means any Third Party to whom Virobay grants a license under or
assigns the Celera Intellectual Property conveyed to Virobay pursuant to this Agreement. 
 1.26 “Losses” means
suits, claims, actions, demands, liabilities, expenses and/or losses, including without limitation reasonable legal expenses and attorneys’ fees. 

1.27 “Major Market Country” means (a) the United States, (b) any of the United Kingdom, France, Germany, Spain or
Italy, (c) Japan, or (d) Canada. 
 1.28 “Net Sales” means 

(a) all gross revenues recognized in accordance with GAAP from the arms-length sale or other disposition of Assigned Products by
Virobay, its Affiliates or Licensees to a Third Party, less the following items: 
 (i) Trade, cash and quantity discounts actually
allowed and taken directly with respect to such sales; 
 (ii) Tariffs, duties, excises and sales taxes imposed upon and paid
directly with respect to such sales (reduced by any refunds of such taxes deducted in the calculation of Net Sales for prior periods); 

(iii) Amounts repaid or credited by reason of rejections, defects, recalls or returns or because of chargebacks, refunds, rebates or
retroactive price reductions; 
 (iv) Separately invoiced freight and shipping insurance expenses; and 

(v) Invoiced amounts that are written off as uncollectible in accordance with Virobay’s accounting policies, as consistently
applied over all of Virobay’s products, provided that the total amounts written off shall not exceed 2% of all amounts invoiced; 
 The
deductions set forth in clauses (i) through (v) above will be determined in accordance with GAAP, as consistently applied by Virobay across all of its products. 

(b) A “sale” will include the transfer or other disposition of an Assigned Product for consideration other than cash, in
which case such consideration will be valued at the fair market value thereof. In the event that an Assigned Product is sold either for consideration other than cash or as part of a bundled product, the Net Sales of such Assigned Product will be the
greater of (i) the recognized amount attributable to the Assigned Product, or (ii) the average unit price of such Assigned Product in Dosage Form when sold (other than as part of a bundle) in cash transactions in such country. If Virobay,
its Affiliates or Licensees do not separately sell such Assigned Product in such country, the Net Sales for such Assigned Product will be calculated based on the average unit price of such Assigned Product when sold (other than as part of a bundle)
in cash transactions in Major Market Countries collectively. 

  
 5. 









 (c) Amounts received by Virobay, its Affiliates or Licensees for the sale of Assigned
Products among Virobay, its Affiliates and Licensees for resale will not be included in the computation of Net Sales hereunder. Distributors of Virobay selling Assigned Products will not be deemed to be Licensees of Virobay. 

(d) If Virobay, its Affiliates or Licensees sell an Assigned Product in Bulk Form to a Third Party who is not a Licensee, for resale
(and in such event such Third Party’s sales would not then constitute “Net Sales” of a Licensee ), then the amount to be included in the calculation of Net Sales arising from such sale by Virobay, its Affiliates or Licensees will be
the amount that would have been recognized as gross revenue (minus the deductions set forth above) if such Assigned Product had been sold in Dosage Form, to be determined using the average units of Assigned Product in Dosage Form expected to be
produced from the quantity of Assigned Product in Bulk Form sold and the average amount of gross revenue recognized by Virobay, its Affiliates or Licensees for the same Assigned Product in Dosage Form sold in the same country during the preceding
three calendar months. If there have been no sales of the same Assigned Product in Dosage Form in the same country during the preceding three calendar months, the Parties will agree upon an amount for such Bulk Form sale which will not be less than
a good faith determination of the amount invoiced by the Third Party upon resale of Assigned Product in Dosage Form obtained from the quantity of Assigned Products purchased in Bulk Form. 

(e) In the event that, on a country-by-country basis, an Assigned Product is sold in the form of a Combination Product, the Net Sales
for such Combination Product will be calculated as follows: 
 (i) If Virobay, its Affiliates or Licensees separately sell, in such
country, (x) Assigned Products as contained in such Combination Product and (y) other products containing as their sole active ingredient(s) the other Active Components in such Combination Product, the Net Sales attributable to such
Combination Product will be calculated by multiplying actual Net Sales of the Combination Product (calculated in accordance with Section 1.28(a)-(d)) by the fraction A/(A+B) where: A is Virobay’s (or its Affiliates or Licensees, as
applicable) average wholesale price during the period to which the Net Sales calculation applies to its three (3) largest distributors of the Assigned Product in such country, and B is Virobay’s (or its Affiliate’s or Licensee’s,
as applicable) average wholesale price during the period to which the Net Sales calculation applies to its three (3) largest distributors in such country of products which contain as their sole active ingredient(s) the other Active Components
in the Combination Product. 
 (ii) If Virobay, its Affiliates or Licensees separately sell, in such country, Assigned Products as
contained in such Combination Product but do not separately sell, in such country, other products containing as their sole active ingredient(s) the other Active Components in such Combination Product, the Net Sales attributable to such Combination
Product will be calculated by multiplying the Net Sales of such Combination Product (calculated in accordance with Section 1.28(a)-(d)) by the fraction A/C where: A is Virobay’s (or its Affiliate’s or Licensee’s, as applicable)
average wholesale price for the Assigned Product(s) as contained in such Combination Product during the period to which the Net Sales calculation 

  
 6. 









 
applies to its three (3) largest distributors of an Assigned Product in such country, and C is Virobay’s (or its Affiliate’s or Licensee’s, as applicable) average wholesale
price for the Combination Product during the period to which the Net Sales calculation applies to its three (3) largest distributors of the Combination Product in such country. 

(f) If Virobay, its Affiliates or Licensees do not separately sell, in such country, Assigned Products, the Net Sales attributable to
such Combination Product will be calculated by multiplying the Net Sales of such Combination Product (calculated in accordance with Section 1.28(a)-(d)) by the fraction D/D+E where D is the actual total cost of the Assigned Product(s) at the
point of formulation into the Combination Product and E is the actual total cost of the other Active Component(s) in the Combination Product. 

1.29 “New Drug Application” or “NDA” means (a) a FDA new drug application, biologics license
application or its equivalent in the United States, or (b) any corresponding application to a Regulatory Authority in any country. 

1.30 “Patent” means (a) an issued, unexpired patent (with the term “patent” being deemed to encompass, without
limitation, an inventor’s certificate) in any country which has not been held invalid or unenforceable by a court of competent jurisdiction from which no appeal can be taken or has been taken within the required time period, including without
limitation any substitution, extension, registration, confirmation, reissue, re-examination, renewal or any like filing thereof; (b) an application for a patent pending in any country, including without limitation any provisional, converted
provisional, continued prosecution application, continuation, divisional or continuation-in-part thereof; any patents issuing therefrom; and any substitution, extension, registration, confirmation, reissue, reexamination, renewal or like filing
thereof. 
 1.31 “Phase 2 Clinical Trial” means a human clinical trial in any country that is intended to initially
evaluate the effectiveness of an Assigned Product or a Combination Product in relatively small numbers of selected patients for a particular indication or indications in patients with the disease or indication under study or that would otherwise
satisfy requirements of 21 C.F.R. §312.21(b) in the United States, or its foreign equivalent. 
 1.32 “Phase 3 Clinical
Trial” means a pivotal human clinical trial in any country the results of which could be used to establish safety and efficacy of an Assigned Product or a Combination Product as a basis for a regulatory filing or that would otherwise
satisfy requirements of 21 C.F.R. §312.21(c) in the United States, or its foreign equivalent. 
 1.33 “Regulatory
Approval” means any approvals (including supplements, amendments, pre- and post-approvals and price approvals), licenses, registrations or authorizations of any national, supra-national, regional, state or local regulatory agency,
department, bureau, commission, council or other governmental entity, necessary for the distribution, use or sale of an Assigned Product or a Combination Product in a regulatory jurisdiction. 

1.34 “Regulatory Authority” means any national (e.g., the FDA), supra-national (e.g., the EMEA) or other regulatory agency or
governmental entity involved in the granting of Regulatory Approval for, or in the regulation of human clinical studies of, an Assigned Product or a Combination Product. 

  
 7. 









 1.35 “Royalty” or “Royalties” means those amounts payable as
royalties by Virobay to Celera pursuant to Section 6.4 of this Agreement. 
 1.36 “Technology” means any
technical, scientific and business information, including all biological, chemical, pharmacological, toxicological, clinical, and assay information, data, analyses, discoveries, inventions, methods, techniques, improvements, concepts, designs,
processes, formulae, specifications and trade secrets, whether or not patentable, including documents (which include paper, notebooks, books, files, ledgers, records, tapes, discs, diskettes, CD-ROM and any other media on which the foregoing
information can be stored) containing any of the foregoing information. 
 1.37 “Third Party” means any entity other
than Celera or Virobay or an Affiliate of either of them. 
 1.38 “Virobay Patent” means any and all Patents that claim
Technology that is invented by an employee or agent of Virobay or its Licensee after the Effective Date and prior to the second anniversary of the Effective Date. 

ARTICLE 2 
 ASSIGNMENT
AND DELIVERY 
 2.1 Assignment to Virobay. Subject to the terms and conditions of this Agreement, Celera hereby sells, assigns,
delivers, conveys and transfers to Virobay, its successors and assigns, the entire right, title and interest in and to all Celera Intellectual Property throughout the world, and all rights and privileges related thereto. 

2.2 Delivery. Within [* * *] days after the Effective Date, and thereafter as reasonably required upon reasonable notice, Celera
shall deliver to Virobay the Celera Material and all data, documentation, and other physical embodiments of the Celera Technology together with all cooperation, assistance and access to data reasonably requested by Virobay to effect transfer of the
Celera Technology, including without limitation laboratory and other notebooks and related materials, invention disclosures, patent applications and other documents that would be required in prosecuting, maintaining and enforcing Celera Patents.

 2.3 Material Agreements. Cetera represents and warrants that there exist no agreements between Applera or Celera and any Third
Party which are material to the utilization of the Celera Material or exploitation of the Celera Technology, except the Non-Exclusive Sublicense Agreement between Apath, L.L.C. and Applera Corporation through the Celera Genomics Group for HCV
Replicon made and entered into on July 19, 2004. Celera has terminated this agreement with Apath, L.L.C., and will not assign the agreement to Virobay. 

  
 8. 









 ARTICLE 3 

DEVELOPMENT 
 3.1
Development Efforts. Promptly after the Effective Date, Virobay will use Commercially Reasonable Efforts to develop and seek Regulatory Approval for at least one Assigned Product or a Combination Product in the Major Market Countries.

 3.2 Celera Assistance and Cooperation. At Virobay’ s request, Celera will provide reasonable assistance, without further
consideration or charge to Virobay, in understanding and assimilating the Celera Technology and Celera Material for a period of up to June 30, 2006. Such assistance shall include, but not be limited to, cooperation with Virobay, and to use
commercially reasonable efforts to cause its officers, employees, agents, contractors, and others under its direction or control, to cooperate with Virobay in (a) assisting Virobay in filing or prosecuting any patent applications included in
the Celera Patents or maintaining any patents included in the Celera Patents, including without limitation the enforcement of such Celera Patents or any interference or other proceeding involving such Celera Patents (b) executing any further
legal documents, including any further assignments, such as individual assignments for recordation in any governmental office, to evidence the assignment of the Celera Patents, and (c) performing all reasonable acts that may be necessary to
complete the assignment of Celera’s interest in and to the Celera Intellectual Property. After such period, Celera will have no obligation to provide Virobay with any assistance other than: (i) using reasonable efforts to locate personnel
who may be able to provide further assistance in understanding and assimilating the Celera Technology and Celera Material, and (ii) providing Virobay with access to laboratory notebooks or other documentation in Celera’s possession for the
purpose of establishing priority dates for inventions within the Celera Technology or Celera Material or engaging in patent litigation with respect thereto. 

3.3 Development Summaries. For so long as an Assigned Product or a Combination Product is being developed or Commercialized under this
Agreement, Virobay will provide Celera with written summaries of all research, development, clinical, regulatory and commercialization activities using any Celera Intellectual Property or related to Assigned Products or Combination Products
(“Development Summaries”). Virobay will provide Development Summaries on an semi-annual basis during the first [* * *] years after the Effective Date and on an annual basis thereafter. All such Development Summaries
will be Confidential Information of Virobay. 
 ARTICLE 4 

REGULATORY 
 4.1
Regulatory Filings. As of the Effective Date, Virobay shall have the sole right to file, in its own name, and will own any and all Drug Approval Applications for Assigned Products or Combination Products. 

4.2 Applications for Regulatory Exclusivity. The Parties recognize that exclusivity rights granted or provided for under regulatory
laws of any country may be commercially  

  
 9. 









 
significant to Assigned Products or Combination Products. To the extent permitted by law, as between the Parties, Virobay has the exclusive right to file for, request and maintain any regulatory
exclusivity rights for any and all Assigned Products or Combination Products, including without limitation, regulatory exclusivity rights based upon an orphan drug designation of an Assigned Product or a Combination Product, and to conduct and
prosecute any proceedings or actions to enforce such regulatory exclusivity rights. 
 ARTICLE 5 

COMMERCIALIZATION 
 5.1
Pricing. Virobay shall have the sole right to determine in its sole discretion the pricing, discounting policy and other commercial terms relating to Assigned Products or Combination Products. 

5.2 Commercial Diligence. Upon receipt of Regulatory Approval for an Assigned Product or a Combination Product in any country, Virobay
will use Commercially Reasonable Efforts to Commercialize such Assigned Product or Combination Product in the countries for which Regulatory Approval is obtained. 

ARTICLE 6 

CONSIDERATION 
 6.1
Fee. Within [* * *] days after the Effective Date, Virobay will pay Celera a fee of two hundred and fifty thousand Dollars ($250,000) in cash by wire transfer of immediately available funds into an account designated by Celera. The fees
paid pursuant to this Section 6.1 will be nonrefundable and non-creditable against Royalties due Celera pursuant to this Agreement or against any other fees, milestone payments or other payments due Celera under this Agreement. 

6.2 Stock. On the Effective Date, Virobay and Celera will execute the Stock Issuance Agreement substantially in the form
attached as Exhibit 6.2 hereto. The Stock Issuance Agreement provides that Virobay will issue without additional consideration and in partial consideration for the assignment to Virobay of the Celera Intellectual Property under this
Agreement, to Celera, common stock of Virobay in an amount which represents five percent (5%) of Virobay’s fully-diluted capitalization. 

6.3 Product Milestones. Virobay will pay to Celera one-time milestone payments as set forth in this Section 6.3 within
[* * *] days after the first achievement of the corresponding milestone for the first Assigned Product or Combination Product to reach such milestone by Virobay, its Affiliates or Licensees. Such payment will be made in Dollars by wire
transfer of immediately available funds into an account designated by Celera. No milestone payment will be payable more than once, no matter how many times achieved by a single Assigned Product or multiple Assigned Products or Combination Products.
Such milestone payments will be nonrefundable and non-creditable against Royalties payable pursuant to Sections 6.4 and 6.6, and any other fees, milestone payments or other payments due Celera under this Agreement. 

  
 10. 










					
	 Milestone Event
	  	Milestone Payment Amount
(Dollars)	 
	 1. [* * *]
	  	$	[* * *]	  
	 2. [* * *]
	  	$	[* * *]	  
	 3. [* * *]
	  	$	[* * *]	  
		  	  
	  
	 
	 Total
	  	$	15 million	  

 If any Milestone Event described in Section 6.3 is achieved with respect to an Assigned Product or a Combination Product
prior to payment to Celera hereunder of any previously listed Milestone Payment described in Section 6.3, respectively, with respect to such Assigned Product or Combination Product, then upon payment to Celera hereunder of the applicable
Milestone Payment, Virobay additionally will pay to Celera all previously listed Milestone Payments described in Section 6.3 with respect to such Assigned Product or Combination Product which have not previously been paid to Celera hereunder.

 6.4 Royalties. 

(a) Subject to the terms and conditions of this Agreement, Virobay will pay Celera a tiered Royalty in accordance with the following
table on worldwide Net Sales of each Assigned Product or Combination Product by Virobay, its Affiliates and its Licensees: 
  

					
	 Total Net Sales of such Assigned Product or Combination Product in a Calendar Year
	  	Percent of Net Sales	 
	 [* * *] to $ [* * *]
	  	 	[* * *]	% 
	 $[* * *] to $[* * *]
	  	 	[* * *]	% 
	 Above $[* * *]
	  	 	[* * *]	% 

 (b) Notwithstanding Section 6.4(a): 

(i) where such Assigned Product or Combination Product is covered only by a Virobay Patent and not a Celera Patent, and such Virobay
Patent claims Technology 

  
 11. 









 
that is invented by an employee or agent of Virobay or its Licensee between the first anniversary of the Effective Date and the second anniversary of the Effective Date, such royalty rate shall
be [* * *] that provided above in Section 6.4(a); and 
 (ii) where such Assigned Product or Combination Product is
covered only by a Virobay Patent and not a Celera Patent, and such Virobay Patent claims Technology that is invented by an employee or agent of Licensee (a “Licensee Virobay Patent”) and such Licensee has [* * *] on
sales of such Assigned Product or Combination Product, [* * *]; provided, however, that Virobay shall [* * *]. 
 6.5 Term
of Royalties. Virobay’s obligations to pay Royalties under Section 6.4 will commence upon the First Commercial Sale of an Assigned Product or a Combination Product anywhere in the world and continue, on an Assigned Product-by-Assigned
Product or a Combination Product-by-Combination Product and country-by-country basis, until the expiration of the last-to-expire valid claim of an issued and enforceable Celera Patent and Virobay Patent that covers the manufacture, use, sale, offer
for sale or import of such Assigned Product in such country. 
 6.6 Royalty Payments and Reports. All Royalties payable to
Celera under this Agreement will be paid in Dollars by wire transfer of immediately available funds into an account designated by Celera within [* * *] days after the end of each calendar quarter, except as otherwise specifically provided
herein. Each payment of Royalties owing to Celera will be accompanied by a statement, certified by an executive officer of Virobay as accurate to the best of its ability consistent with Virobay’s standard practices in performing such
computations and in accordance with GAAP, on a country-by-country basis, setting forth (a) the amount of gross sales of Assigned Products and, if applicable, Combination Products in such quarter, (b) any deductions from such amount of
gross sales as permitted pursuant to Section 1.30, (c) a calculation of Net Sales of each Assigned Product and, if applicable, Combination Product for such quarter, (d) the amount of aggregate worldwide Net Sales of Assigned Product
and, if applicable, Combination Product on a cumulative per year basis for the current year, and (e) the amount of Royalty due on Net Sales during such quarter. 

6.7 Records; Royalty Audit. Virobay will keep or cause to be kept such records as are necessary to determine, in a manner consistent
with GAAP, the accuracy of calculations of all sums or credits due to Celera under this Agreement. Such records will be retained for no less than a [* * *] year period following the year in which a payment was made hereunder. Once per
calendar year, Celera may engage, at its own expense, an independent certified public accountant appointed by Celera and reasonably acceptable to Virobay, to examine, in confidence, the records of Virobay as may be necessary to determine, with
respect to any calendar year, the correctness or completeness of any report or payment required to be made under this Agreement. The report of such accountant will be limited to a certificate verifying any report made or payment submitted by Virobay
during such period but may include, in the event the accountant is unable to verify the correctness of any such payment, information relating to why such payment is unverifiable. All information contained in any such certificate


  
 12. 









 
will be Confidential Information of Virobay hereunder. If any audit performed under this Section 6.8 discloses an underpayment, Virobay will promptly remit to Celera the underpaid amount,
plus interest as provided in Section 6.12 and, if the underpayment is more than [* * *] from the amount of the original report, Royalty or payment calculation, Virobay will reimburse Celera for the full cost of the performance of such
audit. 
 6.8 Taxes. Celera will be responsible for any and all taxes levied on account of amounts it receives under this Agreement.
If Virobay is required by law, rule or regulation to withhold taxes from such types of payments due Celera hereunder, Virobay will (a) deduct those taxes from the remittable amount, (b) pay the taxes to the proper taxing authority, and
(c) send original copies of all official receipts evidencing such tax obligation together with written evidence of payment to Celera within [* * *] business days following such payment. In the event of any such withholding, the Parties
agree to confer regarding other reasonable, lawful measures to minimize such withholding. 
 6.9 Blocked Currency. In any
country where conversion of the local currency is blocked and such currency cannot be removed from the country, Virobay will make payments of any Royalties due hereunder in respect of Net Sales of Assigned Products or Combination Products in such
country in local currency by depositing such amount to an interest-bearing account in the name of Celera, in a bank within such country designated by Celera. 

6.10 Foreign Exchange. For the purpose of computing the Net Sales for sale or other distribution of Assigned Products and, if
applicable, Combination Products in a currency other than Dollars, such currency will be converted into Dollars at the average rate of exchange for buying Dollars as available from the on-line edition of the Wall Street Journal (at
http://www.interactive.wsj.com) for the calendar quarter in which such sales or other distributions were made. 
 6.11 Late
Payments. Any amounts not paid by Virobay when due under this Agreement will be subject to interest from and including the date payment is due through and including the date upon which Virobay has made a wire transfer of immediately available
funds into an account designated by Celera at a rate equal to the sum of [* * *] plus the annual prime rate or successive annual prime rates of interest quoted in the Money Rates section of the on-line edition of the Wall Street Journal (at
http://www.interactive.wsj.com) calculated daily on the basis of a 365-day year. 
 ARTICLE 7 

INTELLECTUAL PROPERTY 

7.1 Prosecution of Patents. As of the Effective Date, Virobay will bear the sole responsibility and costs for prosecuting and
maintaining all Celera Patents, using patent counsel of Virobay’s choice, including any such out-of-pocket costs that remain unpaid and were accrued by Celera on or after May 8, 2006; provided that such amounts shall not exceed thirty
thousand Dollars ($30,000). Such costs that remain unpaid and were accrued on or after May 8, 2006 shall be either reimbursed by Virobay to Celera, or paid directly to Celera’s patent counsel, as directed by Celera. Celera, upon request,
will provide reasonable assistance to Virobay in the prosecution  

  
 13. 









 
and maintenance of any Celera Patents. In the event that Virobay elects not to continue to prosecute or maintain any patent or patent application within Celera Patents, Virobay will give timely
notice to Celera, and Celera, at its sole discretion and expense, may elect to continue to prosecute or maintain such patent or patent application and, in such an event, Virobay will assign to Celera all right, title and interest in and to all such
patents or patent applications. 
 7.2 Infringement of Patents by Third Parties. Virobay will use commercially reasonable efforts to
enforce Celera Patents and Virobay Patents. Virobay has the sole right to enforce the Celera Patents against Third Parties and to defend the Celera Patents against any challenge. Celera will reasonably assist and cooperate in any such enforcement or
defense. Virobay will bear all costs and expenses (including attorneys’ fees) incurred by either Party after the Effective Date to carry out the activities described in this Section 7.2. Recoveries in any actions under this
Section 7.2 will first be used to reimburse each Party’s costs and expenses (including attorneys’ fees) for such action. After the reimbursement of costs and expenses (“Net Recovery”), Virobay will pay to
Celera out of Net Recovery an amount equal to [* * *]. 
 7.3 Infringement of Third Party Rights 

(a) Notice. Each Party will promptly notify the other upon becoming aware of any Third Party claim or action against Virobay and/or
Celera for infringement of any Third Party Patent based on Assigned Products. 
 (b) Defense. Virobay will defend any action which
names Virobay and/or Celera and which claims the infringement of any Third Party Patent through the making, using, selling, offer for sale or importing an Assigned Product after the Effective Date. If necessary and at Virobay’s expense, Celera
will assist and cooperate with Virobay in any such defense. Virobay will bear all costs and expenses (including attorneys’ fees) and pay all damages and settlement amounts arising out of or in connection with any such action. Virobay will have
sole control over the defense of any such action, including the settlement thereof. 
 ARTICLE 8 

REPRESENTATIONS AND WARRANTIES 

8.1 Mutual Representations and Warranties. Each Party hereby represents and warrants to the other Party as follows: 

(a) Corporate Existence and Power. As of the Effective Date, it is a corporation duly organized, validly existing and in good standing
under the laws of the state of Delaware, and has full corporate power and authority and the legal right to own and operate its property and assets and to carry on its business as it is now being conducted and as contemplated in this Agreement,
including, without limitation, the right to make the assignments hereunder. 
 (b) Authority and Binding Agreement. As of the
Effective Date, (i) it has the corporate power and authority and the legal right to enter into this Agreement and perform its obligations hereunder; (ii) it has taken all necessary corporate action on its part required to


  
 14. 









 
authorize the execution and delivery of the Agreement and the performance of its obligations hereunder; and (iii) the Agreement has been duly executed and delivered on behalf of such Party,
and constitutes a legal, valid and binding obligation of such Party that is enforceable against it in accordance with its terms. 
 (c)
No Conflict. As of the Effective Date, the execution, delivery and performance of this Agreement by such Party does not conflict with, and would not result in a breach of any agreement, instrument or understanding, oral or written, to which it
is a party or by which it may be bound, nor violate any material law or regulation of any court, governmental body or administrative or other agency having jurisdiction over it. 

(d) Validity. As of the Effective Date, it is aware of no action, suit, inquiry or investigation instituted by any Third Party which
questions or threatens the validity of this Agreement. 
 8.2 Mutual Covenants. Each Party hereby covenants to the other Party as
follows: 
 (a) No Misappropriation. It will not knowingly misappropriate the trade secret of a Third Party in its activities to
develop or Commercialize Assigned Products. 
 (b) No Debarment. In the course of the development and manufacture of Assigned
Products, such Party will not knowingly use and will not have knowingly used any employee or consultant who is or has been debarred by the FDA or Regulatory Authorities, or, to the best of such Party’s knowledge, is or has been the subject of
debarment proceedings by the FDA or Regulatory Authorities. 
 (c) No Conflict. It will not knowingly enter into any agreement with
any Third Party that is in conflict with this Agreement, and will not take any action that would in any way prevent it from performing its obligations or granting the rights granted to the other Party under this Agreement in any material respect.

 8.3 Representations, Warranties and Covenants of Virobay. 

(a) Expertise. In entering into this Agreement, Virobay has relied upon the representations and warranties of Celera in Article 8 and
its own scientific and commercial experience and its own analysis and evaluation of both the scientific and commercial value of the Assigned Products. 

(b) Compliance by Virobay. Virobay covenants to comply with all laws, statutes, regulations and guidance of Regulatory Authorities
applicable to the development, manufacture and Commercialization of the Assigned Products or Combination Products in an applicable country. 

  
 15. 









 8.4 Representations and Warranties of Celera. Celera hereby represents and warrants to
Virobay as follows: 
 (a) Celera is the sole owner of all right, title and interest in all Celera Intellectual Property, including
without limitation all of the patents and patent applications listed on Exhibit 1.7. and has obtained all assignments necessary from its employees with respect to the inventions claimed therein. 

(b) Except otherwise provided for in Section 7.1, all fees payable to any governmental authority in respect of the Celera Patents
have been paid through the Effective Date and, to the best of Celera’s knowledge, Celera has complied with all applicable laws in connection with the submission, filing and maintenance of such Celera Patents. 

(c) No covenant not to sue or license has been granted to any Third Party to make, have made, use, develop, import, imported, export,
sell or have sold any product and/or process under any Celera Intellectual Property. 
 (d) To the best of Celera’s knowledge,
there have been no claims or judicial proceedings concerning any of the Celera Intellectual Property and no such claims have been threatened. 

(e) None of the Celera Intellectual Property is subject to any lien or other encumbrance. 

(f) To the best of Celera’s knowledge, Celera has not, in the course of the development and manufacture of Assigned Products, used
any employee or consultant who is or has been debarred by the FDA or Regulatory Authorities, or, to the best of such Celera’s knowledge, is or has been the subject of debarment proceedings by the FDA or Regulatory Authorities. 

8.5 Disclaimer. Except as otherwise set forth in this Article 8, nothing in this Agreement will be construed as: 

(a) a warranty or representation by Celera as to the validity, enforceability or scope of any Celera Patent; or 

(b) a warranty or representation that anything made, used, sold, or otherwise disposed of pursuant to this Agreement is or will be free
from infringement of Patents or other intangible rights of Third Parties; or 
 (c) a requirement that Celera or Virobay must file
any patent application, secure any Patent, or maintain any Patent in force; or 
 (d) an obligation on Celera or Virobay to bring or
prosecute actions or suits against Third Parties for infringement of the Celera Patents; or 
 (e) granting by implication, estoppel,
or otherwise, any license or rights under patents, trade secrets, know-how, copyrights, or other intangible rights of Celera other than the Celera Intellectual Property; or 

(f) an obligation to furnish any manufacturing or technical information beyond that under Section 3.2 or as otherwise assigned
under Section 2.1. 

  
 16. 









 8.6 EXCEPT AS OTHERWISE SET
FORTH IN THIS ARTICLE 8, CELERA MAKES NO REPRESENTATIONS, EXTENDS NO WARRANTIES
OF ANY KIND, EITHER EXPRESS OR IMPLIED, AND ASSUMES NO RESPONSIBILITIES
WHATEVER WITH RESPECT TO MANUFACTURE, USE, SALE OR OTHER DISPOSITION BY
VIROBAY, ITS AFFILIATES, ITS LICENSEES, OR THEIR CUSTOMERS OR TRANSFEREES, OF
PRODUCTS INCORPORATING OR MADE BY USE OF INVENTIONS ASSIGNED UNDER THIS
AGREEMENT. 
 8.7 EXCEPT AS OTHERWISE SET
FORTH IN THIS ARTICLE 8, CELERA MAKES NO OTHER WARRANTIES, GUARANTEES, OBLIGATIONS,
LIABILITIES, RIGHTS AND REMEDIES, EXPRESS OR IMPLIED, ARISING BY LAW OR
OTHERWISE AND EXPRESSLY DISCLAIMS ANY AND ALL IMPLIED OR STATUTORY WARRANTIES
WITH RESPECT TO THE USEFULNESS OR FREEDOM FROM DEFECTS OF THE
ASSIGNED PRODUCTS, INCLUDING, BUT NOT LIMITED TO, (A) ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS, (B) ANY IMPLIED WARRANTY ARISING FROM COURSE
OF PERFORMANCE, COURSE OF DEALING OR USAGE IN THE TRADE, AND
(C) INFRINGEMENT OF THIRD PARTY INTANGIBLE PROPERTY RIGHTS. 

ARTICLE 9 

INDEMNIFICATION 
 9.1
Indemnification by Celera. Celera hereby agrees to defend, hold harmless and indemnify (collectively “Indemnify”) Virobay, its Affiliates, and their respective agents, directors, officers and employees (the
“Virobay Indemnitees”) from and against any and all Losses arising out of any Third Party claims to the extent resulting out of or arising from: (i) any of Celera’s representations and warranties set forth in this
Agreement being untrue in any material respect when made, (ii) any material breach or material default by Celera of its material covenants and material obligations under this Agreement, or (iii) the conduct of the Celera Programs prior to
the Effective Date. To be eligible to be so Indemnified, the Virobay Indemnitees will provide Celera with prompt notice of any claim giving rise to the indemnification obligation pursuant to this Section 9.1; provided that
Celera will be relieved of its obligations only if the failure by the Virobay Indemnitee to deliver prompt notice is prejudicial to its ability to defend such action. Each Virobay Indemnitee will provide Celera with the exclusive ability to defend
such claim (with the reasonable cooperation of Virobay Indemnitees), subject to Virobay’s right to participate in and have counsel selected by it participate, at Virobay’s expense. Virobay may not settle any claim under this
Section 9.1 without Celera’s prior written consent. Celera’s obligation to Indemnify the Virobay Indemnitees pursuant to this Section 9.1 will not apply to the extent of any Losses (i) that arise from the negligence or
intentional misconduct of any Virobay Indemnitee; or (ii) that arise from Virobay’s material breach of this Agreement; or (iii) for which Virobay is obligated to Indemnify the Celera Indemnitees pursuant to Section 9.2 of this
Agreement. 
 9.2 Indemnification by Virobay. Virobay hereby agrees to Indemnify Celera, its Affiliates, and their respective
agents, directors, officers and employees (the “Celera  

  
 17. 









 
Indemnitees”) from and against any and all Losses arising out of any Third Party claims to the extent resulting out of or arising from: (i) any of Virobay’s representations
and warranties set forth in this Agreement being untrue in any material respect when made, (ii) any material breach or material default by Virobay of its material covenants or material obligations under this Agreement, or (iii) the making,
having made, using, selling, having sold, offering for sale, or import and/or otherwise distributing of Assigned Products or Combination Products by, on behalf of, or under the authority of Virobay, its Affiliates or any of its Licensees (including,
without limitation, any Losses arising from, relating to, or based upon any claim by a Third Party that an Assigned Product or a Combination Product was or is unsafe, unfit or otherwise deficient in quality or condition, or an Assigned Product or a
Combination Product caused any death or personal injury of any kind, including but not limited to any death or personal injury occurring during the conduct of any clinical trial by, on behalf of, or under the authority of Virobay, its Affiliates or
Licensees). To be eligible to be Indemnified as described above in this Section 9.2, the Celera Indemnitees will provide Virobay with prompt notice of any claim giving rise to the indemnification obligation pursuant to this Section 9.2;
provided that Virobay will be relieved of its obligations only if the failure by the Celera Indemnitee to deliver prompt notice is prejudicial to its ability to defend such action. Each Celera Indemnitee will provide Virobay with the
exclusive ability to defend such claim (with the reasonable cooperation of Celera Indemnitees), subject to Celera’s right to participate in and have counsel selected by it participate, at Celera’s expense. Celera will not settle any claim
under this Section 9.2 without Virobay’s prior written consent. Virobay’s obligation to Indemnify the Celera Indemnitees pursuant to this Section 9.2 will not apply to the extent of any Losses (i) that arise from the
negligence or intentional misconduct of any Celera Indemnitee, or (ii) for which Celera is obligated to Indemnify the Virobay Indemnitees pursuant to Section 9.1 of this Agreement, or (iii) that arise from any material breach by
Celera of this Agreement. 
 9.3 Insurance. Prior to the first administration of an Assigned Product or Combination Product in a
human clinical trial, Virobay, its Affiliates or Licensees, at its own expense, will procure one or more insurance policies adequate to cover its obligations hereunder and which are consistent with normal business practices of prudent companies
similarly situated, or in the case of a Licensee, will self-insure to cover such obligations. Virobay, its Affiliates, or Licensees (as appropriate) will carry comprehensive general liability, property damage, and product liability insurance with a
minimum insurance limit of [* * *]. Each insurance policy required by, and procured under, this Section 9.3 by Virobay will name Celera as an additional insured. The existence of such insurance will not limit the insuring Party’s
liability with respect to its indemnification obligations under this Article 9. Virobay will provide Celera with written evidence of such insurance upon request. Virobay will provide Celera with written notice at least [* * *] days prior to
the cancellation, non-renewal or material change in such insurance or self-insurance which materially adversely affects the rights of Celera hereunder. 

9.4 Limitation of Liability. NEITHER PARTY NOR ITS
RESPECTIVE AFFILIATES AND LICENSEES WILL BE LIABLE FOR SPECIAL, EXEMPLARY,
CONSEQUENTIAL OR PUNITIVE DAMAGES, WHETHER IN CONTRACT, WARRANTY, TORT, STRICT
LIABILITY OR OTHERWISE INCURRED BY THE OTHER PARTY IN CONNECTION WITH
THIS AGREEMENT, INCLUDING BUT NOT LIMITED TO DAMAGES MEASURING LOST PROFITS
OR BUSINESS OPPORTUNITIES. NOTWITHSTANDING THE FOREGOING, (A) THE FOREGOING LIMITATIONS
WILL NOT APPLY TO DAMAGES ARISING FROM A BREACH OF ARTICLE 10,


  
 18. 









 
AND (B) AMOUNTS PAID BY A PARTY TO A
THIRD PARTY AS SPECIAL, EXEMPLARY, CONSEQUENTIAL OR PUNITIVE DAMAGES, WHETHER IN
CONTRACT, WARRANTY, TORT, STRICT LIABILITY OR OTHERWISE WILL BE DEEMED DIRECT
DAMAGES AND REIMBURSED BY THE OTHER PARTY TO THE EXTENT SUCH OTHER
PARTY IS REQUIRED TO INDEMNIFY SUCH FIRST PARTY PURSUANT TO THE
INDEMNIFICATIONS OF SECTION 9.1 OR 9.2. 

  
 19. 









 ARTICLE 10 

CONFIDENTIALITY 
 10.1
Treatment of Confidential Information. The Parties agree that for a period of [* * *] years after the Effective Date, a Receiving Party must (a) maintain in confidence the Disclosing Party’s Confidential Information to the same
extent the Receiving Party maintains its own proprietary information of similar kind and value (but at a minimum each Party will use commercially reasonable efforts to maintain Confidential Information in confidence); (b) not disclose such
Confidential Information to any Third Party without prior written consent of the Disclosing Party; and (c) not use such Confidential Information for any purpose except those purposes permitted by this Agreement. 

10.2 Authorized Disclosure. Notwithstanding any other provision of this Agreement, each Party may disclose Confidential Information of
the other Party: 
 (a) to the extent and to the persons and entities as required by an applicable law, rule, regulation,
legal process, court order or the rules of the National Association of Securities Dealers or of a Regulatory Authority; or 
 (b) to
the extent reasonably necessary to file or prosecute patent applications pursuant to Section 7.1 of this Agreement, prosecute or defend litigation or otherwise establish rights or enforce obligations under this Agreement; 

provided, however, that the Receiving Party required or intending to disclose the Disclosing Party’s Confidential Information under Sections
10.2(a) or (b) will first give prompt notice to the Disclosing Party to enable it to seek any available exemptions from or limitations on such disclosure requirement and will reasonably cooperate in such efforts by the Disclosing Party.

 10.3 Publicity; Terms of Agreement. The Parties agree that the existence of and the material terms of this Agreement are
Confidential Information of both Parties, subject to the special authorized disclosure provisions set forth below in this Section 10.3 (in lieu of the authorized disclosure provisions set forth in Section 10.2, to the extent of any
conflict) and without limiting the generality of the definition of Confidential Information set forth in Section 1.13. The Parties will mutually agree to the text of a press release announcing the execution of this Agreement. Thereafter, if
either Party desires to make a public announcement concerning this Agreement or the terms hereof, such Party will give reasonable prior advance notice of the proposed text of such announcement to the other Party for its prior review and approval,
such approval not to be unreasonably withheld. A Party will not be required to seek the permission of the other Party to repeat any information as to the terms of this Agreement that have already been publicly disclosed by such Party in accordance
with the foregoing or by the other Party. Either Party may disclose the terms of this Agreement to actual or potential investors, collaborators, licensees or commercial partners who agree to be bound by obligations of non-disclosure and non-use at
least as stringent as those contained in this Article 10. The  

  
 20. 









 
Parties acknowledge that Celera and/or Virobay may be obligated to file a copy of this Agreement with the U.S. Securities and Exchange Commission with its next quarterly report on Form 10-Q,
annual report on Form 10-K or current report on Form 8-K or with any registration statement filed with the U.S. Securities and Exchange Commission (the “SEC”) pursuant to the Securities Act of 1933, as amended and each such
Party will be entitled to make such filing, provided that it requests confidential treatment of the more sensitive terms hereof to the extent such confidential treatment reasonably available to the filing Party under the circumstances then
prevailing. In the event of any such filing, the filing Party will provide the non-filing Party with an advance copy of the Agreement marked to show provisions for which the filing Party intends to seek confidential treatment and will reasonably
consider the non-filing Party’s timely comments thereon. 
 ARTICLE 11 

TERM 
 11.1 Term.
The terms and conditions of this Agreement will commence on the Effective Date and will continue in full force and effect until the expiration of Virobay’s obligation to pay Royalties pursuant to Section 6.4; provided that the assignment
provided for in Section 2.1 shall survive any such termination. 
 11.2 Material Breach. In the event of any material
breach of any provision of this Agreement by either Party, the other Party will have all rights and remedies available at law or in equity subject to Article 12. 

ARTICLE 12 
 DISPUTE
RESOLUTION 
 12.1 Disputes. The Parties recognize that disputes as to certain matters may from time to time arise which relate
to either Party’s rights or obligations hereunder. It is the objective of the Parties to establish procedures to facilitate the resolution of disputes arising from, concerning or in any way relating to this Agreement in an expedient manner by
mutual cooperation and without resort to litigation. To accomplish this objective, the Parties agree to follow the procedures set forth in this Section 12.1 if and when a dispute arises under this Agreement. The Parties will undertake good
faith efforts to resolve any such dispute in good faith. In the event the Parties are unable to resolve such dispute, either Party may, by written notice to the other Party, have any dispute between the Parties remaining unresolved after [* *
*] days referred to their respective executive officers designated below or their designees or successors for attempted resolution by good faith negotiations within [* * *] days after such notice is received. Such designated officers are
as follows: 
  

			
	For Virobay:	    	[* * *]
		
	For Celera:	    	President, the Celera Genomics Group of Applera Corporation


  
 21. 









 If the designated officers are not able to resolve such dispute within such [* * *] day period,
either Party may at any time thereafter pursue any legal or equitable remedy available to it. Notwithstanding the above, either Party will be entitled at all times and without delay to seek equitable relief and disputes regarding patent rights shall
be subject to Section 12.3. The Parties agree that all discussions and negotiations conducted pursuant to this Section 12.1, and any documents exchanged during any such discussions or negotiations, will be treated as if subject to Rule
408, Federal Rules of Evidence. 
 12.2 Governing Law; Judicial Resolution. Resolution of all disputes arising out of or
related to this Agreement or the performance, enforcement, or breach of this Agreement and any remedies relating thereto, will be governed by and construed under the substantive laws of the State of California, as applied to agreements executed and
performed entirely in the State of California by residents of the State of California, without regard to conflicts of law rules. The exclusive jurisdiction for any dispute arising under this Agreement will be a state or federal court of competent
jurisdiction in California. 
 12.3 Patent Dispute Resolution. Any dispute, controversy or claim relating to the scope,
validity, enforceability or infringement of any patent rights claiming the use or sale of any Assigned Product will be submitted to a court of competent jurisdiction in which such patent rights were granted or arose. Notwithstanding the foregoing,
any dispute, controversy or claim relating to the scope, validity, enforceability or infringement of any United States patent rights covering the use or sale of any Assigned Product will be submitted to a court of competent jurisdiction in the State
of California. 
 ARTICLE 13 

MISCELLANEOUS 
 13.1
Entire Agreement; Amendment. This Agreement (including all Exhibits) and the Confidential Disclosure Agreement dated November 8, 2005, set forth the complete, final and exclusive agreement and all the covenants, promises, agreements,
warranties, representations, conditions and understandings between the Parties hereto and supersedes and terminates all prior and contemporaneous agreements and understandings between the Parties. There are no covenants, promises, agreements,
warranties, representations, conditions or understandings, either oral or written, between the Parties other than as are set forth herein and therein. No subsequent alteration, amendment, change or addition to this Agreement will be binding upon the
Parties unless reduced to writing and signed by an authorized officer of each Party. 
 13.2 Force Majeure. Both Parties will
be excused from the performance of their obligations under this Agreement to the extent that such performance is prevented by Force Majeure and the nonperforming Party promptly provides notice of the prevention to the other Party. Such excuse will
be continued so long as the condition constituting Force Majeure continues and the nonperforming Party uses reasonable efforts to remove the condition. Incidents of Force Majeure will not excuse the mere payment of money. 

  
 22. 









 13.3 Notices. Any notice required or permitted to be given under this Agreement must be in
writing, must specifically refer to this Agreement and will be deemed to have been sufficiently given for all purposes if mailed by first class certified or registered mail, postage prepaid, express delivery service or personally delivered, or if
sent by facsimile, electronic transmission confirmed. Unless otherwise specified in writing, the mailing addresses of the Parties are as described below. 
  

			
	For Celera:	    	 Celera Genomics
 45 West Gude Drive

Rockville, Maryland 20850

		    	Attn: Legal Department
		    	Facsimile: [* * *]
		
	With a Copy to:	    	Applera Corporation
		    	301 Merritt 7
		    	Norwalk, Connecticut 06851
		    	Attn: General Counsel
		    	Facsimile: [* * *]
		
	For Virobay:	    	Virobay, Inc.
		    	c/o TPG Ventures
		    	345 California Street, Suite 2600
		    	San Francisco, CA 94104
		    	Attn: [* * *] 
		    	Facsimile: [* * *]
		
	With a Copy to:	    	Cooley Godward LLP
		    	5 Palo Alto Square
		    	3000 El Camino Real
		    	Palo Alto, CA 94301
		    	Attn: [* * *]
		    	Facsimile: [* * *]

 13.4 Maintenance of Records. Each Party will keep and maintain all records required by law or
regulation with respect to Assigned Products and will make copies of such records available to the other Party upon request. 

13.5 No Strict Construction. This Agreement has been prepared jointly and will not be strictly construed against either Party.

 13.6 Assignment. Neither Party may assign or transfer this Agreement or any rights or obligations hereunder without the prior
written consent of the other, except that a Party may make such an assignment without the other Party’s consent to Affiliates or to an entity that acquires all or substantially all of the business of such Party related to this Agreement,
whether in a merger, consolidation, reorganization, acquisition, sale or otherwise. This Agreement will be binding on the successors and assigns of the assigning Party, and the name of a Party appearing herein will be deemed to include the name(s)
of such Party’s successors and permitted  

  
 23. 









 
assigns to the extent necessary to carry out the intent of this Agreement. Any assignment or attempted assignment by either Party in violation of the terms of this Section 13.6 will be null
and void and of no legal effect. Celera may assign its right of payments under this Agreement without the prior approval of Virobay. 

13.7 Performance by Affiliates and Licensees. Each of Celera and Virobay acknowledge that obligations under this Agreement may be
performed by Affiliates of Celera and Virobay or Virobay’s Licensees. Wherever in this Agreement the Parties delegate responsibility to Affiliates or Licensees, the Parties agree that such entities may not make decisions inconsistent with this
Agreement, amend the terms of this Agreement or act contrary to its terms in any way. 
 13.8 Counterparts. This Agreement may
be executed in two (2) or more counterparts, each of which will be deemed an original, but all of which together will constitute one and the same instrument. 

13.9 Severability. If any one or more of the provisions of this Agreement is held to be invalid or unenforceable by any court of
competent jurisdiction from which no appeal can be or is taken, the provision will be considered severed from this Agreement and will not serve to invalidate any remaining provisions hereof. The Parties must make a good faith effort to replace any
invalid or unenforceable provision with a valid and enforceable one such that the objectives contemplated by the Parties when entering this Agreement may be realized. 

13.10 Headings. The headings for each article and section in this Agreement have been inserted for convenience of reference only and
are not intended to limit or expand on the meaning of the language contained in the particular article or section. 
 13.11
Further Actions. Each Party agrees to execute, acknowledge and deliver such further instruments, and to do all such other acts, as may be necessary or appropriate in order to carry out the purposes and intent of the Agreement. 

13.12 Independent Contractors. The relationship between Virobay and Celera created by this Agreement is one of independent contractors
and neither Party will have the power or authority to bind or obligate the other except as expressly set forth in this Agreement. 

13.13 Use of Name. No right, express or implied, is granted to either Party by this Agreement to use in any manner any trademark, trade
name or logo of the other Party, including the names “Celera”, “Applera”, and “Virobay”, without the prior written consent of the owning Party. 

13.14 No Waiver. Any delay in enforcing a Party’s rights under this Agreement or any waiver as to a particular default or other
matter will not constitute a waiver of such Party’s rights to the future enforcement of its rights under this Agreement, except with respect to an express written and signed waiver relating to a particular matter for a particular period of
time. 

  
 24. 









 IN WITNESS WHEREOF, the
Parties have executed this Agreement in duplicate originals by their duly authorized representatives. 
  

									
	APPLERA CORPORATION	 		 	VIROBAY, INC.
	THROUGH THE CELERA GENOMICS GROUP	 		 		 	
					
		 		 		 	By:	 	 /s/ Heather Preston M.D.

	By:	 	 /s/ Kathy Ordonez
	 		 		 	
		 		 		 	Print Name:	 	 Heather Preston M.D.

	Print Name:	 	 Kathy Ordonez
	 		 		 	
		 		 		 	Title:	 	 Interim Chief Executive Officer

	Title:	 	 SVP Applera and President, Celera Genomics
	 		 		 	
		 		 		 		 	


  
 25. 









 EXHIBIT 1.6 

CELERA MATERIALS 
  

	
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]
	[* * *]

 ] 

  
 26. 









 EXHIBIT 1.7 

CELERA PATENTS 
  

					
	 	  	 Ref. No.
	  	 Content

	[* * *]	  	[* * *]	  	[* * *]
	[* * *]	  	[* * *]	  	[* * *]
	[* * *]	  	[* * *]	  	[* * *]
	[* * *]	  	[* * *]	  	[* * *]
	[* * *]	  	[* * *]	  	[* * *]

 [* * *] 

  
 29. 









 EXHIBIT 6.2 

STOCK ISSUANCE AGREEMENT 

See Attached 

  
 30. 









 STOCK ISSUANCE 

AGREEMENT 

THIS STOCK ISSUANCE AGREEMENT (the “Agreement”) is
entered into as of May 26, 2006, by and between APPLERA CORPORATION ACTING THROUGH ITS CELERA GENOMICS
GROUP (“Celera”) and VIROBAY, INC., a Delaware corporation (“Virobay” or the “Company”). 

BACKGROUND 

A. Virobay was incorporated on May 18, 2006 for the purpose of discovering, developing and commercializing small molecule
Hepatitis C Virus inhibitors as therapeutic agents. 
 B. On and effective as of even date herewith, Celera and Virobay have entered
into an Assignment Agreement in which, inter alia, Celera has assigned to Virobay certain proprietary technologies and know-how relating to discovery and development of small molecule Hepatitis C Virus inhibitors as therapeutic agents (the
“Assignment Agreement”). 
 C. In connection with the execution and delivery of the Assignment Agreement, Virobay has
agreed to issue to Celera shares of common stock, par value $0.0001 per share, of Virobay (the “Common Stock”) representing five percent (5%) of the fully-diluted capital stock of Virobay as of the date of this Agreement, on the terms
and conditions described herein. 
 AGREEMENT 

The parties to this Agreement, intending to be legally bound, agree as follows: 

 

	1.	ISSUANCE OF STOCK. 

 1.1 Issuance of
Stock. On the date hereof, in exchange for the assignments made to Virobay as set forth in the Assignment Agreement and other good and valuable consideration, Virobay shall issue and deliver to Celera a certificate registered in the name of
Applera Corporation representing 125,000 shares of Common Stock (the “Shares”). Celera shall not be obligated to pay any consideration to the Company in respect of the Shares except as set forth in this Section 1.1. 

 

	2.	REPRESENTATIONS OF VIROBAY. 

 2.1
Organization. The Company is a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware. The Company has all requisite corporate power and authority to conduct its business as now conducted and as
presently proposed to be conducted. The Company has delivered to Celera true, complete and correct copies of the Certificate of Incorporation and By-laws of the Company (the “Charter Documents”).  

  
 31. 









 2.2 Authorization; Binding Obligations. The Company has full right, power, and authority
to enter into this Agreement and the Assignment Agreement and to consummate the transactions contemplated hereby and thereby. All corporate action on the part of the Company, its officers, directors and stockholders necessary for the authorization
of this Agreement and the Assignment Agreement, the performance of all obligations of the Company hereunder and thereunder, and the authorization, sale, issuance and delivery of the Shares pursuant hereto has been taken. This Agreement and the
Assignment Agreement have been duly and validly executed and delivered by the Company and, assuming that this Agreement and the Assignment Agreement have been duly and validly executed and delivered by Celera, constitute valid and binding
obligations of the Company enforceable in accordance with their respective terms, except (a) as limited by applicable bankruptcy, insolvency, reorganization, moratorium or other laws of general application affecting enforcement of
creditors’ rights and (b) general principles of equity that restrict the availability of equitable remedies. 
 2.3
Capitalization. After giving effect to the issuance of the Shares contemplated hereby, the authorized capital stock of the Company will consist of 2,500,000 shares of Common Stock, of which 125,000 will be issued and outstanding. The Shares,
when issued and delivered in accordance with the provisions of this Agreement, will be duly and validly authorized and issued, fully paid and nonassessable shares and free of restrictions on transfer and all other liens and encumbrances, other than
restrictions on transfer under this Agreement and applicable state and federal securities laws. There are no outstanding options, warrants, or other rights pursuant to which the Company is obligated to issue any capital stock or any other
commitments or agreements under which the Company is or may become obligated to sell or otherwise issue any shares of its capital stock or any other securities or the Company; provided that in addition to the Shares to be issued
pursuant to this Agreement, the Company intends to issue 2,375,000 shares of Common Stock to TPG Biotechnology Partners, L.P., or its affiliates. 

2.4 No Conflicts. The Company is not in violation or default of any term of its Charter Documents or of any provision of any mortgage,
indenture, contract, agreement, or instrument to which it is party or by which it is bound or of any judgment, decree, order or writ. The execution, delivery, and performance of and compliance with this Agreement and the Assignment Agreement, and
the issuance and sale of the Shares pursuant hereto, will not (with or without notice or lapse of time or both) result in any such violation or default under, or be in conflict with or constitute a default under, any such mortgage, indenture,
contract, agreement, instrument, judgment, decree, order, or writ, or result in the creation of any mortgage, pledge, lien, encumbrance or charge upon any of the properties or assets of the Company or the suspension, revocation, impairment,
forfeiture or nonrenewal of any permit, license, authorization or approval applicable to the Company, its business or operations or any of its assets or properties. 

2.5 Offering Valid. Assuming the accuracy of the representations and warranties of Celera contained in Section 3.2, the offer,
sale and issuance of the Shares will be exempt from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), and will have been registered or qualified (or are exempt from registration and
qualification) under the registration, permit or qualification requirements of all applicable state securities laws. The Company has not engaged in any “general solicitation,” as defined in Regulation D promulgated under the Securities
Act, with respect to the Shares. 

  
 32. 










	3.	REPRESENTATIONS OF CELERA. 

 3.1
Authorization; Binding Obligations. All corporate action on the part of Celera, its officers, directors and stockholders necessary for the authorization of this Agreement and the Assignment Agreement and the performance of all obligations of
Celera hereunder and thereunder has been taken. This Agreement and the Assignment Agreement have been duly and validly executed and delivered by Celera and, assuming that this Agreement and the Assignment Agreement have been duly and validly
executed and delivered by the Company, constitute valid and binding obligations of Celera enforceable in accordance with their respective terms, except (a) as limited by applicable bankruptcy, insolvency, reorganization, moratorium or other
laws of general application affecting enforcement of creditors’ rights and (b) general principles of equity that restrict the availability of equitable remedies. 

3.2 Investment Representations. Celera understands that the Shares have not been registered under the Securities Act. Celera also
understands that the Shares are being offered and sold pursuant to an exemption from registration contained in the Securities Act based in part upon Celera’s representations contained in this Agreement. Celera hereby represents and warrants as
follows: 
 (a) Economic Risk. Celera has substantial experience in evaluating and investing in private placement transactions
of securities in companies similar to the Company so that it is capable of evaluating the merits and risks of its investment in the Company and has the capacity to protect its own interests. Celera must bear the economic risk of this investment
indefinitely unless the Shares are registered pursuant to the Securities Act, or an exemption from registration is available. Celera understands that the Company has no present intention of registering the Shares or any shares of its Common Stock.
Celera also understands that there is no assurance that any exemption from registration under the Securities Act will be available and that, even if available, such exemption may not allow Celera to transfer all or any portion of the Shares under
the circumstances, in the amounts or at the times Celera might propose. 
 (b) Acquisition for Own Account. Celera is acquiring the
Shares for Celera’s own account for investment only, and not with a present view towards their distribution. 
 (c) Accredited
Investor. Celera represents that it is an accredited investor within the meaning of Regulation D under the Securities Act. 
 (d)
Rule 144. Celera acknowledges and agrees that the Shares are “restricted securities” as defined in Rule 144 promulgated under the Securities Act as in effect from time to time (“Rule 144”) and must be held indefinitely unless
they are subsequently registered under the Securities Act or an exemption from such registration is available. Celera has been advised or is aware of the provisions of Rule 144, which permits limited resale of shares purchased in a private placement
subject to the satisfaction of certain conditions, including, among other things: the availability of certain current public information about the Company, the resale occurring following the required holding period under Rule 144 and the number of
shares being sold during any three-month period not exceeding specified limitations. 

  
 33. 










	4.	HOLD HARMLESS. 

 Virobay shall defend, indemnify and hold
harmless Celera, its affiliates and their respective stockholders, directors, officers and employees and their respective successors and assigns from and against any loss, claims or liability of any kind that arises out of, in connection with, or as
a result of any breach of the terms of this Agreement. 
  

	5.	COVENANTS OF VIROBAY. 

 5.1 Basic
Financial Information and Reporting. 
 (a) The Company will maintain true books and records of account at the Company’s
principal place of business in which full and correct entries will be made of all its business transactions pursuant to a system of accounting established and administered in accordance with generally accepted accounting principles in the United
States (“GAAP”) consistently applied. The Company will set aside on its books and records all such proper accruals and reserves as shall be required under GAAP consistently applied. 

(b) To the extent requested by Celera, as soon as practicable after the end of each fiscal year of the Company, the Company will
furnish Celera with a balance sheet of the Company, as at the end of such fiscal year, and a statement of income and a statement of cash flows of the Company, for such year, all prepared in accordance with GAAP consistently applied (except as noted
therein or as disclosed to the recipients thereof) and setting forth in each case in comparative form the figures for the previous fiscal year, all in reasonable detail. Such financial statements shall be accompanied by a report and opinion thereon
by independent public accountants selected by the Company’s Board of Directors. 
 (c) To the extent requested by Celera, the
Company will furnish Celera, as soon as practicable after the end of the first, second and third quarterly accounting periods in each fiscal year of the Company, a balance sheet of the Company as of the end of each such quarterly period, and a
statement of income and a statement of cash flows of the Company for such period and for the current fiscal year to date, prepared in accordance with GAAP consistently applied (except as noted therein or as disclosed to the recipients thereof), with
the exception that no notes need be attached to such statements and year-end audit adjustments may not have been made. 
 (d) To the
extent requested by Celera, the Company will furnish Celera, prior to the beginning of each fiscal year an annual budget and operating plans for such fiscal year (and as soon as available, any subsequent written revisions thereto). 

5.2 Inspection Rights. Celera shall have the right to visit and inspect, during normal business hours and at a mutually agreed upon
time and date, any of the properties of the Company or any of its subsidiaries, and to discuss the affairs, finances and accounts of the Company or any of its subsidiaries with its officers, employees and public accountants (and the


  
 34. 









 
Company hereby authorizes said accountants to discuss with Celera such affairs, finances and accounts), to examine the books or account and records and to review such other information as is
reasonably requested for any proper purpose reasonably related to Celera’s interest in the Company and its rights and responsibilities as a shareholder of the Company. 

5.3 Confidentiality of Records. Celera agrees to use the same degree of care as Celera uses to protect its own confidential information
to keep confidential any information furnished to Celera pursuant to this letter agreement that the Company identifies in writing as being confidential or proprietary (so long as such information is not in the public domain), except that Celera may
disclose such information (i) to any partner, subsidiary or parent of Celera and the officers, directors, employees, advisors, agents, and representatives of such parties as long as such partner, subsidiary, parent, officer, director, employee,
advisor, agent, or representative is advised of and agrees or has agreed to be bound by the confidentiality provisions of this letter agreement or comparable restrictions; (ii) at such time as it enters the public domain through no fault of
Celera; (iii) that is communicated to it free of any obligation of confidentiality; (iv) that is developed by Celera or its agents independently of and without reference to any confidential information communicated by the Company; or
(v) as required by applicable law. 
 5.4 Piggyback Registration Rights. The Company shall notify Celera in writing at least ten
(10) days prior to the filing of any registration statement under the Securities Act, for purposes of a public offering of securities of the Company, either for its own account or the account of a security holder or holders, and will afford
Celera an opportunity to include in such registration statement all or part of such shares of Common Stock held by Celera. Celera shall, within fifteen (15) days after receipt of the above-described notice from the Company, notify the Company
in writing if it elects to include shares in such registration statement. Such notice shall state the intended method of disposition of the shares held by Celera. Following receipt of such notice from Celera, the Company shall use all commercially
reasonable efforts to cause such shares to be included in the securities to be covered by such registration statement, all to the extent requisite to permit the sale by Celera of such shares in accordance with its notice. If Celera decides not, or
is unable, to include all of its shares of Common Stock in any registration statement thereafter filed by the Company, Celera shall nevertheless continue to have the right to include any of its shares of Common Stock in any subsequent registration
statement or registration statements as may be filed by the Company with respect to offerings of its securities pursuant to this agreement. 

5.5 Protective Provisions. So long as Celera owns any shares of Common Stock, the Company shall not, without Celera’s prior
written consent: 
 (a) Effect or permit any amendment to the right of first refusal of the Company to repurchase shares of its
Common Stock contained in the Company’s By-laws or any such right that may be included in the Company’s Certificate of Incorporation, as it may be amended from time to time, which is reasonably likely to have an adverse effect on
Celera’s right to sell or transfer its Common Stock under such By-laws or Certificate of Incorporation; or 

  
 35. 









 (b) Except for transactions approved by the Board of Directors of the Company, enter into
any material transaction with any director, officer, employee, or holder of more than 5% of the outstanding capital stock of any class or series of capital stock of the Company, member of the family of any such person, or any corporation,
partnership, trust, or other entity in which any such person, or member of the family of such person, is a director, officer, trustee, partner, or holder of more than 5% of the outstanding capital stock thereof, other than transactions on customary
terms related to such person’s employment. 
 5.6 Termination of Covenants. The covenants of the Company contained in this
Article 5 shall expire and terminate upon the earlier of (i) the effective date of the registration statement pertaining to an initial public offering of the Company’s securities (the “IPO Effective Date”) or (ii) upon an
“Acquisition” as defined in the Company’s Certificate of Incorporation, as it may be amended from time to time; provided, however, that notwithstanding the foregoing, the registration rights contained in Section 5.4 shall
terminate after the IPO Effective Date at such time as Celera may sell under Rule 144, or a successor rule, in a three month period all shares of Common Stock then held by it; provided further, that to the extent the Company offers Celera piggyback
registration rights similar to those provided in Section 5.4 in a separate agreement with other holders of Company securities (the “Investor Rights Agreement”), Celera hereby agrees to become a party to (and the Company agrees to
obtain for Celera the benefit of) the Investor Rights Agreement on the same terms as such other holders, whereupon the provisions of Section 5.4 shall terminate in their entirety and be amended and superseded in their entirety by the Investor
Rights Agreement. 
  

	6.	MISCELLANEOUS PROVISIONS. 

 6.1 Further Assurances.
Each party hereto shall execute and/or cause to be delivered to each other party hereto such instruments and other documents, and shall take such other actions, as such other party may reasonably request for the purpose of carrying out or
evidencing any of the transactions described in this Agreement. 
 6.2 Governing Law; Venue. 

(a) This Agreement shall be construed in accordance with, and governed in all respects by, the internal laws of the State of California
(without giving effect to principles of conflicts of laws). 
 (b) Any legal action or other legal proceeding relating to this
Agreement or the enforcement of any provision of this Agreement shall be exclusively brought or otherwise exclusively commenced in a state court located in the County of San Mateo, California or a federal court for the Northern District of
California. Each party to this Agreement: 
 (i) expressly and irrevocably consents and submits to the personal
jurisdiction of each state court located in the County of San Mateo, California and each federal court for the Northern District of California (and each appellate court located in the State of California) in connection with any such legal
proceeding; 

  
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 (ii) agrees that each state court located in the County of San Mateo,
California and/or each federal court for the Northern District of California shall be deemed to be a convenient forum; and 
 (iii)
agrees not to assert (by way of motion, as a defense or otherwise), in any such legal proceeding commenced in any state court located in the County of San Mateo, California or any federal court for the Northern District of California, any claim that
such party is not subject personally to the jurisdiction of such court, that such legal proceeding has been brought in an inconvenient forum, that the venue of such proceeding is improper or that this Agreement or the subject matter of this
Agreement may not be enforced in or by such court. 
 6.3 Entire Agreement. This Agreement, together with the Assignment Agreement,
sets forth the entire understanding of the parties relating to the subject matter thereof and supersedes all prior agreements and understandings among or between any of the parties relating to the subject matter thereof. 

6.4 Amendments and Waivers. Any term of this Agreement may be amended or waived (either generally or in a particular instance and
either retroactively or prospectively) only with the written consent of the Company and Celera.  
 6.5 Titles and Subtitles.
The titles of the paragraphs and subparagraphs of this Agreement are for convenience of reference only and are not to be considered in construing this Agreement. 

6.6 Counterparts. This Agreement may be executed in one or more and in separate counterparts, each of which shall be deemed an original
and all of which together shall constitute a single instrument. 
 6.7 Notices. All notices and other communications required
or permitted hereunder shall be effective upon receipt (or on the next business day if the day of receipt is not a business day) and shall be in writing and may be delivered in person, by telecopy, overnight delivery service, or U.S. mail, addressed
to a party at its address set forth on the signature page of this Agreement, or at such other address as such party shall have furnished the other party in writing. 

6.8 Survival of Representations and Warranties. The representations, warranties, covenants, promises, and agreements contained in this
Agreement shall survive the execution and delivery of this Agreement and remain in full force and effect; provided, however, that, except as provided above, such representations and warranties need only be accurate as of the date of such execution
and delivery. 
 6.9 Expenses. The Company and Celera shall each bear their respective legal and other fees and expenses in
connection with the transactions contemplated in this Agreement. 
 [REMAINDER OF PAGE
INTENTIONALLY LEFT BLANK] 

  
 37. 









 THIS EXHIBIT HAS BEEN REDACTED AND IS THE SUBJECT OF A CONFIDENTIAL TREATMENT REQUEST. REDACTED
MATERIAL IS MARKED WITH [* * *] AND HAS BEEN FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION. 
 The parties to this
Agreement have caused this Agreement to be executed and delivered as of the date first above written. 
  

									
	APPLERA CORPORATION ACTING THROUGH ITS CELERA GENOMICS GROUP	 		 	VIROBAY, INC.
					
	By:	 	 /s/ Kathy Ordonez
	 		 	By:	 	 /s/ Heather Preston M.D.

					
	Print Name:	 	 Kathy Ordonez
	 		 	Print Name:	 	 Heather Preston M.D.

					
	Title:	 	 SVP and President, Celera Genomics
	 		 	Title:	 	 Interim Chief Executive Officer


  

			
	Address:	  	45 West Gude Drive
		  	Rockville, MD 20850
		  	Attention: Legal Department
		  	Fax: (240) 453-3781
	
	With a copy of notices to:
		
		  	Applera Corporation
		  	301 Merritt 7
		  	Norwalk, Ct 06851
		  	Attention: Secretary
		  	Fax: (203) 840-2922


  
 1.