Document:

EX-10.9

 Exhibit 10.9 

LEASE 
 by and between 

BMR-John Hopkins Court LLC, 
 a
Delaware limited liability company 
 and 

aTyr Pharma, Inc., 
 a Delaware
corporation 

 LEASE 

THIS LEASE (this “Lease”) is entered into as of this 22nd day of
December, 2011 (the “Execution Date”), by and between BMR-John Hopkins Court LLC, a Delaware limited liability company (“Landlord”), and aTyr Pharma, Inc., a Delaware corporation (“Tenant”).

 RECITALS 

A. WHEREAS, Landlord owns certain real property (the “Property”) and the improvements on the Property located at 3545-3575 John Hopkins Court, San Diego, California, including the building located thereon; 

B. WHEREAS, Landlord wishes to lease to Tenant, and Tenant desires to lease from Landlord, certain premises (the
“Premises”) located on the second (2nd) floor of the building in which the Premises are located (the “Building”), pursuant to the terms and conditions of
this Lease, as detailed below; and 
 C. WHEREAS, the parties anticipate that a portion of the Premises shown as
“Phase 1” on the diagram of the Premises attached hereto as Exhibit A (“Phase 1”) will be ready for occupancy by Tenant prior to the portion of the Premises shown as “Phase 2” on the
diagram of the Premises attached hereto as Exhibit A (“Phase 2”), and that Landlord will deliver possession of Phase 1 prior to the delivery of Phase 2. 

AGREEMENT 
 NOW, THEREFORE,
Landlord and Tenant, in consideration of the mutual promises contained herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound, agree as follows: 

1. Lease of Premises. Effective on the Phase 1 Term Commencement Date with respect to Phase 1 of the Premises and the Phase 2 Term
Commencement Date with respect to Phase 2 of the Premises, Landlord hereby leases to Tenant, and Tenant hereby leases from Landlord, Phase 1 and Phase 2 of the Premises, as shown on Exhibit A attached hereto, for use by
Tenant in accordance with the Permitted Use (as defined below) and no other uses. The Property and all landscaping, parking facilities, private drives and other improvements and appurtenances related thereto, including the Building, are hereinafter
collectively referred to as the “Project.” All portions of the Project that are for the non-exclusive use of tenants of the Building, including driveways, sidewalks, parking areas, landscaped areas, service corridors, stairways,
elevators, public restrooms and public lobbies, are hereinafter referred to as “Common Area.” 
 2. Basic Lease Provisions. For
convenience of the parties, certain basic provisions of this Lease are set forth herein. The provisions set forth herein are subject to the remaining terms and conditions of this Lease and are to be interpreted in light of such remaining terms and
conditions. 
 2.1 This Lease shall take effect upon the Execution Date and, except as specifically otherwise provided within this Lease,
each of the provisions hereof shall be binding upon and 

 
inure to the benefit of Landlord and Tenant from the date of execution and delivery hereof by all parties hereto. 

2.2 In the definitions below, each current Rentable Area (as defined below) is expressed in rentable square footage. Rentable Area and
“Tenant’s Pro Rata Shares” are all subject to adjustment as provided in this Lease. 
  

			
	 Definition or Provision
	  	 Means the Following

	Approximate Rentable Area of Phase 1	  	12,431 square feet
		
	Approximate Rentable Area of Phase 2	  	4,652 square feet
		
	Approximate Rentable Area of Premises	  	17,083 square feet
		
	Approximate Rentable Area of Building	  	72,192 square feet
		
	Approximate Rentable Area of Project	  	72,192 square feet
		
	Tenant’s Pro Rata Share of Building	  	17.22% with respect to Phase 1
 6.44% with respect to Phase 2

23.66% with respect to the Premises

		
	Tenant’s Pro Rata Share of Project	  	17.22% with respect to Phase 1
 6.44% with respect to Phase 2

23.66% with respect to the Premises

 2.3 Initial monthly and annual installments of Base Rent for the Premises (“Base Rent”) as of
the applicable Term Commencement Date, subject to adjustment under this Lease: 
  

									
	 Dates
	  	Square Feet of
Rentable Area	  	Base Rent per
Square Foot of
Rentable Area	  	Monthly
Base Rent	  	Annual Base
Rent
	 Phase 1 Term

Commencement
 Date -
Phase 2
 Term

Commencement
 Date
	  	12,431	  	$3.00 monthly	  	$37,293	  	N/A

  
 2 

									
	 Phase 2 Term

Commencement
 Date - Month*
12
	  	17,083	  	$3.00 monthly	  	$51,249	  	N/A
	Months* 13-24	  	17,083	  	$3.09 monthly	  	$52,786	  	$633,432
	Months* 25-36	  	17,083	  	$3.18 monthly	  	$54,370	  	$652,441
	Months* 37-48	  	17,083	  	$3.28 monthly	  	$56,001	  	$672,014
	Months* 49-60	  	17,083	  	$3.38 monthly	  	$57,681	  	$692,174

  

	*	Note: Months are determined based on the Phase 1 Term Commencement Date. 

 2.4 Estimated Term
Commencement Dates: 
 (a) With respect to Phase 1: May 1, 2012. 

(b) With respect to Phase 2: June 1, 2012. 

2.5 Estimated Term Expiration Date: April 30, 2017. 

2.6 Security Deposit: $51,249. 

2.7 Permitted Use: Office, laboratory and vivarium use in conformity with all federal, state, municipal and local laws, codes, ordinances,
rules and regulations of Governmental Authorities (as defined below), committees, associations, or other regulatory committees, agencies or governing bodies having jurisdiction over the Premises, the Building, the Property, the Project, Landlord or
Tenant, including both statutory and common law and hazardous waste rules and regulations (“Applicable Laws”) 
  

					
	         2.8	  	Address for Rent Payment:	  	BMR-John Hopkins Court LLC
		  		  	P.O. Box 511269
		  		  	Los Angeles, California 90051-7824
			
	         2.9	  	Address for Notices to Landlord:	  	BMR-John Hopkins Court LLC
		  		  	17190 Bernardo Center Drive
		  		  	San Diego, California 92128
		  		  	Attn: Vice President, Real Estate Counsel
			
	         2.10	  	Address for Notices to Tenant:	  	Prior to Commencement Date
			
		  		  	aTyr Pharma, Inc.
		  		  	3565 General Atomics Court, Suite #103
		  		  	San Diego, California 92121
		  		  	Attn: Vice President, Operations

  
 3 

					
		  		  	On and After Commencement Date
			
		  		  	aTyr Pharma, Inc.
		  		  	3545 John Hopkins Court
		  		  	San Diego, California 92121
		  		  	Attn: Vice President, Operations
		  		  	
	        2.11	  	Address for Invoices to Tenant:	  	Same as Address for Notices
		
	        2.12	  	 The  following Exhibits are attached hereto and incorporated herein by reference:

		  		  	

  

	 	Exhibit A	Premises 

	 	Exhibit B	Work Letter 

	 	Exhibit C	Acknowledgement of Term Commencement Date and Term 

	 	  	Expiration Date 

	 	Exhibit D	Form of Additional TI Allowance Acceptance Letter 

	 	Exhibit E	Form of Letter of Credit 

	 	Exhibit F	Rules and Regulations 

	 	Exhibit G	Form of Estoppel Certificate 

	 	Exhibit H	Form of Convertible Unsecured Promissory Note 

 3. Term. The actual term of this Lease (as the same may
be extended pursuant to Article 42 hereof, and as the same may be earlier terminated in accordance with this Lease, the “Term”) shall commence on the actual Phase 1 Term Commencement Date (as defined in Article 4) for
Phase 1 and the actual Phase 2 Term Commencement Date (as defined in Article 4) for Phase 2 and end on the date that is sixty (60) months after the actual Phase 1 Term Commencement Date (such date, the “Term
Expiration Date”), subject to earlier termination of this Lease as provided herein. TENANT HEREBY WAIVES THE REQUIREMENTS OF SECTION 1933 OF THE CALIFORNIA CIVIL CODE, AS THE SAME MAY BE AMENDED FROM TIME TO TIME. 

4. Possession and Commencement Date. 

4.1 Landlord shall use commercially reasonable efforts to tender possession of Phase 1 to Tenant on the Estimated Phase 1 Term
Commencement Date, with the Phase 1 work (the “Phase 1 Tenant Improvements”) required of Landlord described in the Work Letter attached hereto as Exhibit B (the “Work Letter”) Substantially Complete (as defined
below). Landlord shall provide Tenant with access to Phase 1 at least thirty (30) days prior to the estimated Phase 1 Term Commencement Date for the installation and set-up of Tenant’s furniture, fixtures and equipment;
provided that such access does not interfere with the construction of the Phase 2 Tenant Improvements (as defined below); and provided, further, that, if the Phase 1 Tenant Improvements are Substantially Complete before the date
that is thirty (30) days prior to the Estimated Phase 1 Term Commencement Date, Landlord shall tender possession of Phase 1 to the Tenant on such earlier date and Tenant shall be allowed to start conducting business in Phase 1
(so long as Tenant has obtained all necessary permits and approvals required to conduct business in Phase 1 and Tenant’s activities in Phase 1 do not interfere with the construction of the Phase 2 Tenant Improvements), but not
earlier than sixty (60) days prior to the Estimated Phase 1 Term Commencement Date. Tenant agrees that in the 

  
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event such work is not Substantially Complete on or before the Estimated Phase 1 Term Commencement Date for any reason, then (a) this Lease shall not be void or voidable,
(b) Landlord shall not be liable to Tenant for any loss or damage resulting therefrom (except that, if Landlord does not deliver possession of Phase 1 to Tenant with the Tenant Improvements Substantially Complete by May 1, 2012,
Tenant shall be entitled to rental abatement following the Phase 1 Term Commencement Date equal to one (1) day for each day of such delay beyond such date that Landlord fails to deliver possession of Phase 1 to Tenant), (c) the
Term Expiration Date shall be extended accordingly and (d) Tenant shall not be responsible for the payment of any Base Rent or Tenant’s Share of Operating Expenses (as defined below) until the actual Phase 1 Term Commencement Date as
described in Section 4.2 occurs. Landlord shall use commercially reasonable efforts to tender possession of Phase 2 to Tenant on the Estimated Phase 2 Term Commencement Date, with the Phase 2 work (the “Phase 2
Tenant Improvements” and, together with the Phase 1 Tenant Improvements, the “Tenant Improvements”) required of Landlord described in the Work Letter Substantially Complete by the Estimated Phase 2 Term Commencement Date;
provided that, if the Phase 2 Tenant Improvements are Substantially Complete before the Estimated Phase 2 Term Commencement Date, Landlord shall tender possession of Phase 2 to the Tenant on such earlier date and Tenant shall be
allowed to start conducting business in Phase 2 (so long as Tenant has obtained all necessary permits and approvals required to conduct business in Phase 2). The term “Substantially Complete” or “Substantial Completion”
means that the Tenant Improvements (or applicable portion thereof) are substantially complete in accordance with the Approved Plans (as defined in the Work Letter), except for minor punch list items brought to Landlord’s attention by Tenant
within thirty (30) days after Substantial Completion of the Tenant Improvements (or applicable portion thereof), which items Landlord shall promptly correct and/or repair upon receipt of notice from Tenant. Notwithstanding anything in this
Lease (including the Work Letter) to the contrary, Landlord’s obligation to timely achieve Substantial Completion shall be subject to extension on a day-for-day basis as a result of Force Majeure (as defined below). 

4.2 The “Phase 1 Term Commencement Date” shall be the latest of (a) the Estimated Phase 1 Term Commencement Date,
(b) the day Landlord tenders possession of Phase 1 to Tenant with the Phase 1 Tenant Improvements Substantially Complete and (c) the day that is thirty (30) days after Tenant is provided access to Phase 1 for the
installation and set up of Tenant’s furniture, fixtures and equipment, as described in Section 4.1. The “Phase 2 Term Commencement Date” shall be the later of (y) the Estimated Phase 2 Term Commencement Date and
(z) the day on which Landlord tenders possession of Phase 2 to Tenant with the Phase 2 Tenant Improvements Substantially Complete. The Phase 1 Term Commencement Date and the Phase 2 Term Commencement Date shall be referred
to herein, collectively, as the “Term Commencement Dates,” or individually as a “Term Commencement Date.” If possession is delayed by action of Tenant, then the applicable Term Commencement Date shall be the date that such Term
Commencement Date would have occurred but for such delay. Tenant shall execute and deliver to Landlord written acknowledgment of the Phase 1 Term Commencement Date and the Term Expiration Date within ten (10) days after Tenant takes
occupancy of Phase 1, in the form attached as Exhibit C hereto. Tenant shall execute and deliver to Landlord written acknowledgment of the Phase 2 Term Commencement Date within ten (10) days after Tenant takes occupancy of
Phase 2, in the form attached as Exhibit C hereto. Failure to execute and deliver such acknowledgments, however, shall not affect the Term Commencement Dates or 

  
 5 

 
Landlord’s or Tenant’s liability hereunder. Failure by Tenant to obtain validation by any medical review board or other similar governmental licensing of the Premises required for the
Permitted Use by Tenant shall not serve to extend the Term Commencement Dates. 
 4.3 Before Tenant enters upon any portion of the Premises
prior to a Term Commencement Date as provided in Section 4.1 for the purpose of installing improvements or the placement of personal property, Tenant shall furnish to Landlord evidence satisfactory to Landlord that insurance coverages
required of Tenant under the provisions of Article 23 are in effect, and such entry shall be subject to all the terms and conditions of this Lease other than the payment of Base Rent or Tenant’s Share of Operating Expenses (as defined
below); provided that, if Tenant enters upon Phase 1 before the date that is thirty (30) days prior to the Estimated Phase 1 Term Commencement Date as provided in Section 4.1, Tenant shall pay the cost for all
utilities used by Tenant in the Premises during such period prior to the Phase 1 Term Commencement Date; and provided, further, that, if a Term Commencement Date is delayed due to any early access by Tenant on the Premises, then such
Term Commencement Date shall be the date that such Term Commencement Date would have occurred but for such delay. 
 4.4 Landlord shall
cause the Tenant Improvements to be constructed in the Premises pursuant to the Work Letter at a cost to Landlord not to exceed (a) One Million Two Hundred Eighty-One Thousand Two Hundred Twenty-Five Dollars ($1,281,225) (based upon
Seventy-Five Dollars ($75) per square foot of Rentable Area (as defined below)) (the “Base TI Allowance”) plus (b) if properly requested by Tenant pursuant to this Section, up to an additional Four Hundred Twenty-Seven Thousand
Seventy-Five Dollars ($427,075) (based upon Twenty-Five Dollars ($25) per square foot of Rentable Area) (the “Additional TI Allowance”), for a total of up to One Million Seven Hundred Eight Thousand Three Hundred Dollars
($1,708,300) (based upon One Hundred Dollars ($100) per square foot of Rentable Area). The Base TI Allowance, together with Additional TI Allowance (if properly requested by Tenant pursuant to this Article), shall be referred to herein as the
“TI Allowance.” The TI Allowance may be applied to the costs of (1) construction, (m) project management by Landlord (which fee shall equal three percent (3%) of the cost of the Tenant Improvements, including the Base
TI Allowance and, if used by Tenant, the Additional TI Allowance), (n) space planning, architect, engineering and other related services performed by third parties unaffiliated with Tenant, (o) building permits and other taxes, fees,
charges and levies by Governmental Authorities (as defined below) for permits or for inspections of the Tenant Improvements, (p) labor and materials, (q) equipment, furniture and fixtures, (r) commercially reasonable costs for the
installation of data cabling and wiring in or to the Premises, (s) Tenant Signage (as defined below) in conformance with the requirements of Section 12.7, (t) Tenant’s actual third party costs and expenses incurred in
connection with relocating to the Premises and (u) the cost of Tenant’s third party project manager hired to oversee the construction of the Tenant Improvements. In no event shall (x) the TI Allowance be used for (i) payments to
Tenant or any affiliates of Tenant, (ii) the purchase of any furniture, personal property or other non-building system equipment, (iii) costs resulting from any default by Tenant of its obligations under this Lease or (iv) costs that
are recoverable by Tenant from a third party (e.g., insurers, warrantors, or tortfeasors), or (y) more than ten percent (10%) of the TI Allowance be used for costs and expenses described in clause (q) above and other
personal property. 

  
 6 

 4.5 Base Rent shall be increased to include the amount of the Additional TI Allowance disbursed
by Landlord in accordance with this Lease amortized over the initial Term at a rate of eight percent (8%) annually. Tenant shall have until the date that is nine (9) months after the Phase 1 Term Commencement Date (the
“TI Deadline”) to expend the unused portion of the TI Allowance, after which date Landlord’s obligation to fund such costs shall expire. The amount by which Base Rent shall be increased shall be determined (and Base Rent
shall be increased accordingly) as of the Phase 1 Term Commencement Date and, if such determination does not reflect use by Tenant of all of the Additional TI Allowance, shall be determined again as of the TI Deadline, with Tenant paying (on
the next succeeding day that Base Rent is due under this Lease (the “TI True-Up Date”)) any underpayment of the further adjusted Base Rent for the period beginning on the Phase 1 Term Commencement Date and ending on the TI
True-Up Date. For purposes of illustration only, if Tenant properly requests and utilizes all of the Additional TI Allowance, the monthly Base Rent shall be increased to Three Dollars and Fifty-One Cents ($3.51) per square foot during the first
twelve (12) months of the initial Term. 
 4.6 Landlord shall not be obligated to expend any portion of the Additional TI Allowance
until Landlord shall have received from Tenant a letter in the form attached as Exhibit D hereto executed by an authorized officer of Tenant. In no event shall any unused TI Allowance entitle Tenant to a credit against Rent payable under this
Lease. 
 5. Condition of Premises. On the date of Landlord’s delivery of possession of the Premises to Tenant, the HVAC, electrical, plumbing,
mechanical and sprinkler systems of the Premises shall be in good working order and repair. Except as provided in the previous sentence, Tenant acknowledges that neither Landlord nor any agent of Landlord has made any representation or warranty with
respect to the condition of the Premises, the Building or the Project, or with respect to the suitability of the Premises, the Building or the Project for the conduct of Tenant’s business. Except as provided in the first sentence of this
Article 5, Tenant acknowledges that (a) it is fully familiar with the condition of the Premises and agrees to take the same in its condition “as is” as of the applicable Term Commencement Date and (b) Landlord shall have
no obligation to alter, repair or otherwise prepare the Premises for Tenant’s occupancy or to pay for or construct any improvements to the Premises, except with respect to the Base TI Allowance and, if properly requested by Tenant pursuant to
the terms of die Lease, the Additional TI Allowance. 
 6. Rentable Area. 

6.1 The term “Rentable Area” shall reflect such areas as reasonably calculated by Landlord’s architect, as the
same may be reasonably adjusted from time to time by Landlord in consultation with Landlord’s architect but only to reflect actual physical changes to the Premises, the Building or the Project, as applicable. 

6.2 The Rentable Area of the Building is generally determined by making separate calculations of Rentable Area applicable to each floor within
the Building and totaling the Rentable Area of all floors within the Building. The Rentable Area of a floor is computed by measuring to the outside finished surface of the permanent outer Building walls. The full area calculated as previously set
forth is included as Rental Area, without deduction for columns and 

  
 7 

 
projections or vertical penetrations, including stairs, elevator shafts, flues, pipe shafts, vertical ducts and the like, as well as such items’ enclosing walls. 

6.3 The term “Rentable Area,” when applied to the Premises, is that area equal to the usable area of the Premises,
plus an equitable allocation of Rentable Area within the Building that is not then utilized or expected to be utilized as usable area (but specifically excluding any vacant space in the Building that Landlord reasonably deems to be leasable),
including that portion of the Building devoted to corridors, equipment rooms, restrooms, elevator lobby, atrium and mailroom. 
 7. Rent. 

7.1 Tenant shall pay to Landlord as Base Rent for Phase 1, commencing on the Phase 1 Term Commencement Date, the applicable portion
of the sums set forth in Section 2.3, and as Base Rent for the entire Premises, commencing on the Phase 2 Term Commencement Date, the sums set forth in Section 2.3, subject to the rental adjustments provided in
Article 8 hereof. Base Rent shall be paid in equal monthly installments as set forth in Section 2.3, subject to the rental adjustments provided in Article 8 hereof, each in advance on the first day of each and every
calendar month during the Term. On the Execution Date, Tenant shall execute and deliver to BioMed Realty, L.P., the sole member of the Landlord, that certain Subordinated Convertible Unsecured Promissory Note of Tenant in the form attached hereto as
Exhibit H (the “Convertible Promissory Note”), a portion of which Convertible Promissory Note represents Tenant’s payment of (a) one hundred percent (100%) of the Base Rent during the first (1st) twelve (12) months of the initial Term beginning on the Phase 1 Term Commencement Date and (b) a portion of Base Rent for each remaining month of the initial Term equal to the
quotient of (m) the positive difference between (i) One Million Dollars ($1,000,000) and (ii) the sum of all Base Rent during the first (1st) twelve (12) months of the
initial Term beginning on the Phase 1 Term Commencement Date, divided by (n) forty-eight (48). 
 7.2 In addition to Base Rent,
Tenant shall pay to Landlord as additional rent (“Additional Rent”) at times hereinafter specified in this Lease (a) Tenant’s Share (as defined below) of Operating Expenses (as defined below), (b) the Property
Management Fee (as defined below) and (c) any other amounts that Tenant assumes or agrees to pay under the provisions of this Lease that are owed to Landlord, including any and all other sums that may become due by reason of any default of
Tenant or failure on Tenant’s part to comply with the agreements, terms, covenants and conditions of this Lease to be performed by Tenant, after notice and the lapse of any applicable cure periods. 

7.3 Base Rent and Additional Rent shall together be denominated “Rent.” Rent shall be paid to Landlord, without abatement,
deduction or offset (except as otherwise provided in this Lease), in lawful money of the United States of America at the office of Landlord as set forth in Section 2.8 or to such other person or at such other place as Landlord may from
time designate in writing. In the event the Term commences or ends on a day other than the first day of a calendar month, then the Rent for such fraction of a month shall be prorated for such period on the basis of a thirty (30) day month and
shall be paid at the then-current rate for such fractional month. 

  
 8 

 8. Rent Adjustments. Base Rent shall be subject to an annual upward adjustment of three percent
(3%) of the then-current Base Rent during the initial Term, as set forth in the chart for Base Rent in Section 2.3. The first such adjustment shall become effective commencing on the first (1st) annual anniversary of the Phase 1 Term Commencement Date, and subsequent adjustments shall become effective on every successive annual anniversary during the initial Term. 

9. Operating Expenses. 
 9.1 As used
herein, the term “Operating Expenses” shall include: 
 (a) Government impositions including property tax costs
consisting of real and personal property taxes and assessments, including amounts due under any improvement bond upon the Building or the Project, including die parcel or parcels of real property upon which the Building and areas serving the
Building are located or assessments in lieu thereof imposed by any federal, state, regional, local or municipal governmental authority, agency or subdivision (each, a “Governmental Authority”) are levied; taxes on or measured by
gross rentals received from the rental of space in the Project; taxes based on the square footage of the Premises, the Building or the Project, as well as any parking charges, utilities surcharges or any other costs levied, assessed or imposed by,
or at the direction of, or resulting from Applicable Laws or interpretations thereof, promulgated by any Governmental Authority in connection with the use or occupancy of the Project or the parking facilities serving the Project; taxes on this
transaction or any document to which Tenant is a party creating or transferring an interest in the Premises; any fee for a business license to operate an office building; and any expenses, including the reasonable cost of attorneys or experts,
reasonably incurred by Landlord in seeking reduction by the taxing authority of the applicable taxes, less tax refunds obtained as a result of an application for review thereof (i.e., any such tax refunds obtained as a result of such expenditures
will be credited against Operating Expenses for the applicable year(s)). Notwithstanding anything to the contrary in this Lease, Operating Expenses shall not include any net income, franchise, capital stock, estate or inheritance taxes, or taxes
that are the personal obligation of Tenant or of another tenant of the Project; Landlord’s general income taxes, transfer taxes (except as set forth above); gift taxes; any excise taxes imposed upon Landlord based upon rentals or income
received by it (except if levied in lieu of real property taxes); taxes attributable to any period outside of the Term (provided that any holdover by Tenant shall be considered within the Term for purposes of this provision); any assessments,
charges, taxes, rents, fees, rates, levies, excises, license fees, permit fees, inspection fees, impact fees, concurrency fees or other fees or charges to the extent allocable to or caused by the development or installation of on- or off-site
improvements or utilities (including street and intersection improvements, roads, rights of way, lighting and signalization) related solely to any future expansion of the Building, or any allocations, reserves or sinking fund relating to such
expansion, unless the same are contained in the property tax bills for the Project; and 
 (b) All other costs of any kind paid or incurred
by Landlord in connection with the operation or maintenance of the Building and the Project (provided that any costs for services, maintenance, repairs and the like provided directly by Landlord or affiliates of Landlord shall be at
commercially reasonable prices), including costs of repairs and 

  
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replacements to non-structural improvements within the Project as appropriate to maintain the Project as required hereunder, costs of utilities furnished to the Common Areas; sewer fees; cable
television; trash collection; cleaning, including windows; heating; ventilation; air-conditioning; maintenance of landscaping and grounds; maintenance of drives and parking areas; maintenance of the roof (not including replacement of any structural
components thereof); security services and devices; building supplies; maintenance or replacement of equipment utilized for operation and maintenance of the Project, provided if the cost of replacing any equipment is a capital expenditure, such cost
shall be amortized as set forth below; license, permit and inspection fees; sales, use and excise taxes on goods and services purchased by Landlord in connection with the operation, maintenance or repair of the Building or Project systems and
equipment; telephone, postage, stationery supplies and other expenses incurred in connection with the operation, maintenance or repair of the Project; accounting, legal and other professional fees and expenses incurred in connection with the
Project; costs of furniture, draperies, carpeting, landscaping and other customary and ordinary items of personal property provided by Landlord for use in Common Areas; the cost of capital repairs, replacements or other improvements or other costs
incurred in connection with the Project (A) which are intended to reduce current or future Operating Expenses to the extent of cost savings reasonably anticipated by Landlord (based upon reasonable supporting documentation) at the time of such
expenditure to be incurred in connection therewith, (B) that are required under any Applicable Laws (except to the extent such costs are incurred to remedy non-compliance as of the Commencement Date with Applicable Laws), and (C) the cost
of replacing any systems and equipment or major components of any systems and equipment that cannot be repaired for a commercially reasonable price or that is beyond its useful life (provided such capital expenditures shall be amortized over
their useful life in accordance with generally accepted accounting principles as applied by Landlord); costs of complying with Applicable Laws (except to the extent such costs are incurred to remedy non-compliance as of the Commencement Date with
Applicable Laws); costs to keep the Project in compliance with, or fees otherwise required under, any CC&Rs (as defined below); insurance premiums, including premiums for public liability, property casualty, earthquake, terrorism and
environmental coverages; portions of insured losses paid by Landlord as part of the deductible portion of a loss pursuant to the terms of insurance policies (provided, however, that if and to the extent Landlord incurs a deductible
payment in excess of Fifty Thousand Dollars ($50,000) (such excess, the “Excess Deductible Amount”), any such Excess Deductible Amount shall be amortized over a reasonable period of time in accordance with generally accepted
accounting principles as applied by Landlord, together with interest at the rate paid by Landlord on any funds borrowed for such expenditures from an unaffiliated third-party financial institution, but in no event in excess of the market rate of
interest customarily paid on such borrowed funds for such purposes); service contracts; costs of services of independent contractors retained to do work of a nature referenced above; and costs of compensation (including employment taxes and fringe
benefits) of all persons who perform regular and recurring duties connected with the day-to-day operation and maintenance of the Project, its equipment, the adjacent walks, landscaped areas, drives and parking areas, including janitors, floor
waxers, window washers, watchmen, gardeners, sweepers and handymen. 
 Notwithstanding the foregoing, Operating Expenses shall not include
any leasing commissions or other costs incurred in procuring tenants, or any fee in lieu of commissions; 

  
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expenses that relate to preparation of rental space for a tenant; expenses of initial development and construction, including grading, paving, landscaping and decorating (as distinguished from
maintenance, repair and replacement of the foregoing); legal expenses relating to other tenants; costs of any nature to the extent reimbursed by condemnation awards, another tenant of the Building (except as part of such tenant’s operating
expenses) or otherwise or payment of insurance proceeds received by Landlord; interest upon loans to Landlord or secured by a mortgage or deed of trust covering the Project or a portion thereof (provided that interest upon a government
assessment or improvement bond payable in installments shall constitute an Operating Expense under Subsection 9.1(a)); salaries of executive officers of Landlord; depreciation claimed by Landlord for tax purposes (provided that this
exclusion of depreciation is not intended to delete from Operating Expenses actual costs of repairs and replacements in regard thereto that are provided for in Subsection 9.1(b)); and taxes that are excluded from Operating Expenses by the
last sentence of Subsection 9.1(a); the cost of providing any service directly to and paid directly by any tenant (outside of such tenant’s operating expense payments); ground lease payments (if any); Landlord’s general corporate
overhead; any compensation paid to clerks, attendants or other persons in commercial concessions operated by Landlord (other than in the parking facility for the Project); marketing costs, including attorneys’ fees in connection with the
negotiation and preparation of letters, deal memos, letters of intent, leases, subleases or assignments, space planning costs, and other costs and expenses incurred in connection with lease, sublease or assignment negotiations and transactions with
present or prospective tenants or other occupants of the Building; expenses in connection with services or other benefits that are not offered to Tenant or for which Tenant is charged directly but that are provided to another tenant or occupant of
the Building, without charge; electric power costs or other utility costs for which any tenant directly contracts with the local public service company; costs of correcting defects in or inadequacy of the initial design or construction of the
Building or any future expansion of the Building; costs incurred to comply with Applicable Laws relating to the removal of Hazardous Materials (as defined in Article 21 below) or to remove, remedy, treat or contain any Hazardous Material,
provided this exclusion from Operating Expenses shall not affect Tenant’s obligations relating to Hazardous Materials in Article 21; costs of upgrades to the Building effectuated solely for the purpose of obtaining or upgrading a
LEED certification or similar rating; reserves for future Operating Expenses; replacements of structural components of the Building and Building foundation; costs arising from the gross negligence or willful misconduct of Landlord or its agents,
employees, vendors, contractors, or providers of materials or services; capital expenditures not otherwise permitted hereunder; and any property management fee, since Tenant pays the Property Management Fee separately pursuant to
Section 9.2. To the extent that Tenant uses more than Tenant’s Pro Rata Share of any item of Operating Expenses, Tenant shall pay Landlord for such excess in addition to Tenant’s obligation to pay Tenant’s Pro Rata Share
of Operating Expenses (such excess, together with Tenant’s Pro Rata Share, “Tenant’s Share”). 
 9.2 Tenant shall
pay to Landlord on the first day of each calendar month of the Term, as Additional Rent, (a) the Property Management Fee (as defined below) and (b) Landlord’s estimate of Tenant’s Share of Operating Expenses with respect to the
Building and the Project, as applicable, for such month. 

  
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 (x) The “Property Management Fee” shall equal three percent (3%) of
Base Rent due from Tenant. Tenant shall pay the Property Management Fee in accordance with Section 9.2 with respect to the entire Term, including any extensions thereof or any holdover periods, regardless of whether Tenant is obligated
to pay Base Rent, Operating Expenses or any other Rent with respect to any such period or portion thereof. 
 (y) Within ninety
(90) days after the conclusion of each calendar year (or such longer period as may be reasonably required by Landlord), Landlord shall furnish to Tenant a statement showing in reasonable detail the actual Operating Expenses and Tenant’s
Share of Operating Expenses for the previous calendar year. Any additional sum due from Tenant to Landlord shall be immediately due and payable. If the amounts paid by Tenant pursuant to this Section exceed Tenant’s Share of Operating Expenses
for the previous calendar year, then Landlord shall credit the difference against the Rent next due and owing from Tenant; provided that, if the Lease term has expired, Landlord shall accompany said statement with payment for the amount of such
difference. 
 (z) Any amount due under this Section for any period that is less than a full month shall be prorated (based on a thirty
(30)-day month) for such fractional month. 
 9.3 Landlord may, from time to time, modify Landlord’s calculation and allocation
procedures for Operating Expenses, so long as such modifications produce Dollar results substantially consistent with Landlord’s then-current practice at the Project. 

9.4 Landlord’s annual statement shall be final and binding upon Tenant unless Tenant, within sixty (60) days after Tenant’s
receipt thereof, shall contest any item therein by giving written notice to Landlord, specifying each item contested and the reasons therefore; provided that Tenant shall in all events pay the amount specified in Landlord’s annual
statement, pending the results of the Independent Review and determination of the Accountant(s), as applicable and as each such term is defined below. If during such sixty (60)-day period, Tenant reasonably and in good faith questions or contests
the correctness of Landlord’s statement of Tenant’s Share (as defined in Section 9.1) of Operating Expenses, Landlord shall provide Tenant with reasonable access to Landlord’s books and records to the extent relevant to
determination of Operating Expenses, and such information as Landlord reasonably determines to be responsive to Tenant’s written inquiries. In the event that, after Tenant’s review of such information, Landlord and Tenant cannot agree upon
the amount of Tenant’s Share of Operating Expenses, then Tenant shall have the right to have an independent public accounting firm hired by Tenant on an hourly basis and not on a contingent-fee basis (at Tenant’s sole cost and expense) and
approved by Landlord (which approval Landlord shall not unreasonably withhold or delay) audit and review such of Landlord’s books and records for the year in question as directly relate to the determination of Operating Expenses for such year
(the “Independent Review”). Landlord shall make such books and records available at the location where Landlord maintains them in the ordinary course of its business. Landlord need not provide copies of any books or records. Tenant
shall commence the Independent Review within fifteen (15) days after the date Landlord has given Tenant access to Landlord’s books and records for the Independent Review. Tenant shall complete the Independent Review and notify Landlord in
writing of Tenant’s specific objections to Landlord’s calculation of Operating Expenses (including Tenant’s accounting 

  
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firm’s written statement of the basis, nature and amount of each proposed adjustment) no later than sixty (60) days after Landlord has first given Tenant access to Landlord’s books
and records for the Independent Review. Landlord shall review the results of any such Independent Review. The parties shall endeavor to agree promptly and reasonably upon Operating Expenses taking into account the results of such Independent Review.
If, as of sixty (60) days after Tenant has submitted the Independent Review to Landlord, the parties have not agreed on the appropriate adjustments to Operating Expenses, then the parties shall engage a mutually agreeable independent third
party accountant with at least ten (10) years’ experience in commercial real estate accounting in the San Diego, California, area (the “Accountant”). If the parties cannot agree on the Accountant, each shall within ten
(10) days after such impasse appoint an Accountant (different from the accountant and accounting firm that conducted the Independent Review) and, within ten (10) days after the appointment of both such Accountants, those two Accountants
shall select a third (which cannot be the accountant and accounting firm that conducted the Independent Review). If either party fails to timely appoint an Accountant, then the Accountant the other party appoints shall be the sole Accountant. Within
ten (10) days after appointment of the Accountant(s), Landlord and Tenant shall each simultaneously give the Accountants (with a copy to the other party) its determination of Operating Expenses, with such supporting data or information as each
submitting party determines appropriate. Within ten (10) days after such submissions, the Accountants shall by majority vote select either Landlord’s or Tenant’s determination of Operating Expenses. The Accountants may not select or
designate any other determination of Operating Expenses. The determination of the Accountant(s) shall bind the parties. If the parties agree or the Accountant(s) determine that the Operating Expenses actually paid by Tenant for the calendar year in
question exceeded Tenant’s obligations for such calendar year, then Landlord shall, at Tenant’s option, either (a) credit the excess to the next succeeding installments of estimated Additional Rent or (b) pay the excess to Tenant
within thirty (30) days after delivery of such results. If the parties agree or the Accountant(s) determine that Tenant’s payments of Operating Expenses for such calendar year were less than Tenant’s obligation for the calendar year,
then Tenant shall pay the deficiency to Landlord within thirty (30) days after delivery of such results. If the Independent Review reveals or the Accountant(s) determine that the Operating Expenses billed to Tenant by Landlord and actually paid
by Tenant to Landlord for the applicable calendar year in question exceeded by more than five percent (5%) what Tenant should have been billed during such calendar year, then Landlord shall pay the reasonable cost of the Accountant(s) and the
Independent Review. In all other cases Tenant shall pay the cost of the Independent Review and the Accountant(s). 
 9.5 Except as provided
in Section 4.3, Tenant shall not be responsible for Operating Expenses attributable to the time period prior to the applicable Term Commencement Date. Tenant’s responsibility for Tenant’s Share of Operating Expenses shall
continue to the latest of (a) the date of termination of the Lease, and (b) the date Tenant has fully vacated the Premises. 
 9.6
Operating Expenses for the calendar year in which Tenant’s obligation to share therein commences and for the calendar year in which such obligation ceases shall be prorated on a basis reasonably determined by Landlord. Expenses such as taxes,
assessments and insurance premiums that are incurred for an extended time period shall be prorated based upon the time periods to which they apply so that the amounts attributed to the Premises relate in a

  
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reasonable manner to the time period wherein Tenant has an obligation to share in Operating Expenses. 

9.7 Within ten (10) business days after the end of each calendar month, Tenant shall submit to Landlord an invoice, or, in the event an
invoice is not available, an itemized list, of all costs and expenses that (a) Tenant has incurred (either internally or by employing third parties) during the prior month and (b) for which Tenant reasonably believes it is entitled to
reimbursements from Landlord pursuant to the terms of this Lease or that Tenant reasonably believes is the responsibility of Landlord pursuant to this Lease or the Work Letter; provided that, for the avoidance of doubt, the parties
acknowledge that Tenant’s obligations to notify Landlord if Tenant believes that the estimated Operating Expenses paid by Tenant are higher than the actual Operating Expenses incurred by Landlord shall be governed by Section 9.4.

 9.8 In the event that the Building or Project is less than fully occupied, Tenant acknowledges that Landlord may extrapolate Operating
Expenses that vary depending on the occupancy of the Building or Project, including utilities, water, sewer, trash removal, janitorial service and supplies and floor cleaning and repairs (collectively, “Variable Operating
Expenses”), as applicable, by dividing (a) the total cost of Variable Operating Expenses by (b) the Rentable Area of the Building or Project (as applicable) that is occupied, then multiplying (y) the resulting quotient by
(z) one hundred percent (100%) of the total Rentable Area of the Building or Project (as applicable). Tenant shall pay Tenant’s Share of the product of (y) and (z), subject to adjustment as reasonably determined by Landlord;
provided, however, that Landlord shall not recover more than one hundred percent (100%) of Variable Operating Expenses. 
 10. Taxes on
Tenant’s Property. 
 10.1 Tenant shall pay prior to delinquency any and all taxes levied against any personal property or trade
fixtures placed by Tenant in or about the Premises. 
 10.2 If any such taxes on Tenant’s personal property or trade fixtures are
levied against Landlord or Landlord’s property or, if the assessed valuation of the Building, the Property or the Project is increased by inclusion therein of a value attributable to Tenant’s personal property or trade fixtures, and if
Landlord, after written notice to Tenant, pays the taxes based upon any such increase in the assessed value of the Building, the Property or the Project, then Tenant shall, upon demand, repay to Landlord the taxes so paid by Landlord. 

10.3 If any improvements in or alterations to the Premises, whether owned by Landlord or Tenant and whether or not affixed to the real
property so as to become a part thereof, are assessed for real property tax purposes at a valuation higher than the valuation at which improvements conforming to Landlord’s building standards (the “Building Standard”) in other
spaces in the Building are assessed, then the real property taxes and assessments levied against Landlord or the Building, the Property or the Project by reason of such excess assessed valuation shall be deemed to be taxes levied against personal
property of Tenant and shall be governed by the provisions of Section 10.2. Any such excess assessed valuation due to improvements in or alterations to space in the Project leased by other tenants at the Project shall not be included in
Operating Expenses. If the records of the County Assessor are available and 

  
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sufficiently detailed to serve as a basis for determining whether said Tenant improvements or alterations are assessed at a higher valuation than the Building Standard, then such records shall be
binding on both Landlord and Tenant. 
 11. Security Deposit. 

11.1 Tenant shall deposit with Landlord on or before the Execution Date the sum set forth in Section 2.6 (the “Security
Deposit”), which sum shall be held by Landlord as security for the faithful performance by Tenant of all of the terms, covenants and conditions of this Lease to be kept and performed by Tenant during the period commencing on the Execution
Date and ending upon the expiration or termination of Tenant’s obligations under this Lease. If Tenant Defaults with respect to any provision of this Lease, including any provision relating to the payment of Rent, then Landlord may (but shall
not be required to) use, apply or retain all or any part of the Security Deposit for the payment of any Rent or any other sum in Default, or to compensate Landlord for any other loss or damage that Landlord may suffer by reason of Tenant’s
Default. If any portion of the Security Deposit is so used or applied, then Tenant shall, within ten (10) days following demand therefor, deposit cash with Landlord in an amount sufficient to restore the Security Deposit to its original amount,
and Tenant’s failure to do so shall be a material breach of this Lease. The provisions of this Article shall survive the expiration or earlier termination of this Lease. TENANT HEREBY WAIVES THE REQUIREMENTS OF SECTION 1950.7 OF THE CALIFORNIA
CIVIL CODE, AS THE SAME MAY BE AMENDED FROM TIME TO TIME. 
 11.2 In the event of bankruptcy or other debtor-creditor proceedings against
Tenant, the Security Deposit shall be deemed to be applied first to the payment of Rent and other charges due Landlord for all periods prior to the filing of such proceedings. 

11.3 Landlord may deliver to any purchaser of Landlord’s interest in the Premises the funds deposited hereunder by Tenant, and thereupon
Landlord shall be discharged from any further liability with respect to such deposit. This provision shall also apply to any subsequent transfers. 

11.4 If Tenant shall fully and faithfully perform every provision of this Lease to be performed by it, then the Security Deposit, or any
balance thereof, shall be returned to Tenant (or, at Landlord’s option, to the last assignee of Tenant’s interest hereunder) within thirty (30) days after the expiration or earlier termination of this Lease. 

11.5 [Intentionally omitted.] 

11.6 If the Security Deposit shall he in cash, Landlord shall hold the Security Deposit in an account at a banking organization selected by
Landlord; provided, however, that Landlord shall not be required to maintain a separate account for the Security Deposit, but may intermingle it with other funds of Landlord. Landlord shall be entitled to all interest and/or dividends, if
any, accruing on the Security Deposit. Landlord shall not be required to credit Tenant with any interest for any period during which Landlord does not receive interest on the Security Deposit. 

  
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 11.7 The Security Deposit may be in the form of cash, a letter of credit or any other security
instrument acceptable to Landlord in its sole discretion. Tenant may at any time, except when Tenant is in Default (as defined below), deliver a letter of credit (the “L/C Security”) as the entire Security Deposit, as follows: 

(a) If Tenant elects to deliver L/C Security, then Tenant shall provide Landlord, and maintain in full force and effect throughout the Term
and until the date that is six (6) months after the then-current Term Expiration Date, a letter of credit in the form of Exhibit E issued by an issuer reasonably satisfactory to Landlord, in the amount of the Security Deposit, with an
initial term of at least one year. Landlord may require the L/C Security to be re-issued by a different issuer at any time during the Term if Landlord reasonably believes that the issuing bank of the L/C Security is or may soon become insolvent;
provided, however, Landlord shall return the existing L/C Security to the existing issuer immediately upon receipt of the substitute L/C Security. If any issuer of the L/C Security shall become insolvent or placed into FDIC
receivership, then Tenant shall immediately deliver to Landlord (without the requirement of notice from Landlord) substitute L/C Security issued by an issuer reasonably satisfactory to Landlord, and otherwise conforming to the requirements set forth
in this Article. As used herein with respect to the issuer of the L/C Security, “insolvent” shall mean the determination of insolvency as made by such issuer’s primary bank regulator (i.e., the state bank supervisor for state
chartered banks; the OCC or OTS, respectively, for federally chartered banks or thrifts; or the Federal Reserve for its member banks). If, at the Term Expiration Date, any Rent remains uncalculated or unpaid, then: (i) Landlord shall with
reasonable diligence complete any necessary calculations; (ii) Tenant shall extend the expiry date of such L/C Security from time to time as Landlord reasonably requires; and (iii) in such extended period, Landlord shall not unreasonably
refuse to consent to an appropriate reduction of the L/C Security. Tenant shall reimburse Landlord’s legal costs (as estimated by Landlord’s counsel) in handling Landlord’s acceptance of L/C Security or its replacement or extension.

 (b) If Tenant delivers to Landlord satisfactory L/C Security in place of the entire Security Deposit, Landlord shall remit to Tenant any
cash Security Deposit Landlord previously held. 
 (c) Landlord may draw upon the L/C Security, and hold and apply the proceeds in the same
manner and for the same purposes as the Security Deposit, if: (i) an uncured Default (as defined below) exists; (ii) as of the date forty-five (45) days before any L/C Security expires (even if such scheduled expiry date is after the
Term Expiration Date) Tenant has not delivered to Landlord an amendment or replacement for such L/C Security, reasonably satisfactory to Landlord, extending the expiry date to the earlier of (1) six (6) months after the then-current Term
Expiration Date or (2) the date one year after the then-current expiry date of the L/C Security; (iii) the L/C Security provides for automatic renewals, Landlord asks the issuer to confirm the current L/C Security expiry date, and the
issuer fails to do so within ten (10) business days; (iv) Tenant fails to pay (when and as Landlord reasonably requires) any bank charges for Landlord’s transfer of the L/C Security; or (v) the issuer of the L/C Security ceases,
or announces that it will cease, to maintain an office in the city where Landlord may present drafts under the L/C Security (and fails to permit drawing upon the L/C Security by overnight 

  
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courier or facsimile). This Section does not limit any other provisions of this Lease allowing Landlord to draw the L/C Security under specified circumstances. 

(d) Tenant shall not seek to enjoin, prevent, or otherwise interfere with Landlord’s draw under L/C Security, even if it violates this
Lease. Tenant acknowledges that the only effect of a wrongful draw would be to substitute a cash Security Deposit for L/C Security, causing Tenant no legally recognizable damage. Landlord shall hold the proceeds of any draw in the same manner and
for the same purposes as a cash Security Deposit. In the event of a wrongful draw, the parties shall cooperate to allow Tenant to post replacement L/C Security simultaneously with the return to Tenant of the wrongfully drawn sums, and Landlord shall
upon request confirm in writing to the issuer of the L/C Security that Landlord’s draw was erroneous. 
 (e) If Landlord transfers its
interest in the Premises, then Tenant shall at Tenant’s expense, within five (5) business days after receiving a request from Landlord, deliver (and, if the issuer requires, Landlord shall consent to) an amendment to the L/C Security
naming Landlord’s grantee as substitute beneficiary. If the required Security Deposit changes while L/C Security is in force, then Tenant shall deliver (and, if the issuer requires, Landlord shall consent to) a corresponding amendment to the
L/C Security. 
 12. Use. 
 12.1 Tenant
shall use the Premises for the purpose set forth in Section 2.7, and shall not use the Premises, or permit or suffer the Premises to be used, for any other purpose without Landlord’s prior written consent, which consent Landlord may
withhold in its sole and absolute discretion. 
 12.2 Tenant shall not use or occupy the Premises in violation of Applicable Laws; zoning
ordinances; or the certificate of occupancy issued for the Building or the Project, and shall, upon five (5) days’ written notice from Landlord, discontinue any use of the Premises that is declared or claimed by any Governmental Authority
having jurisdiction to be a violation of any of the above, or that in Landlord’s reasonable opinion violates any of the above. Tenant shall comply with any direction of any Governmental Authority having jurisdiction that shall, by reason of the
nature of Tenant’s use or occupancy of the Premises, impose any duty upon Tenant or Landlord with respect to the Premises or with respect to the use or occupation thereof. 

12.3 Tenant shall not do or permit to be done anything that will invalidate or increase the cost of any fire, environmental, extended coverage
or any other insurance policy covering the Building or the Project, and shall comply with all rules, orders, regulations and requirements of the insurers of the Building and the Project, and Tenant shall promptly, upon demand, reimburse Landlord for
any additional premium charged for such policy by reason of Tenant’s failure to comply with the provisions of this Article. 
 12.4
Tenant shall keep all doors opening onto public corridors closed, except when in use for ingress and egress. 
 12.5 No additional locks or
bolts of any kind shall be placed upon any of the doors or windows by Tenant, nor shall any changes be made to existing locks or the mechanisms thereof 

  
 17 

 
without Landlord’s prior written consent, which consent shall not be unreasonably withheld. Tenant shall, upon termination of this Lease, return to Landlord all keys to offices and restrooms
either furnished to or otherwise procured by Tenant. In the event any key so furnished to Tenant is lost, Tenant shall pay to Landlord the cost of replacing the same or of changing the lock or locks opened by such lost key if Landlord shall deem it
necessary to make such change. 
 12.6 No awnings or other projections shall be attached to any outside wall of the Building, No curtains,
blinds, shades or screens shall be attached to or hung in, or used in connection with, any window or door of the Premises other than Landlord’s standard window coverings. Neither the interior nor exterior of any windows shall be coated or
otherwise sunscreened without Landlord’s prior written consent, nor shall any bottles, parcels or other articles be placed on the windowsills. No equipment, furniture or other items of personal property shall be placed on any exterior balcony
without Landlord’s prior written consent. 
 12.7 No sign, advertisement or notice (“Signage”) shall be exhibited,
painted or affixed by Tenant on any party of the Premises or the Building without Landlord’s prior written consent (which consent shall not be unreasonably withheld). Subject to the preceding sentence and at Tenant’s election, Tenant shall
be entitled to the following Signage to the extent permitted by Applicable Laws and to the extent it does not prevent another tenant of the Building from receiving its pro rata share of the Building Signage: (i) Building-top Signage,
(ii) monument Signage, and (iii) Signage in the main lobby on the glass walls near the entry, all of which Signage shall conform to Landlord’s design criteria and standards for the Project. For any Signage, Tenant shall, at
Tenant’s own cost and expense (subject to the availability of the TI Allowance as provided in Section 4.4), (a) acquire all permits for such Signage in compliance with Applicable Laws and (b) design, fabricate, install and
maintain such Signage in a first-class condition. Tenant shall be responsible for reimbursing Landlord for costs incurred by Landlord in removing any of Tenant’s Signage upon the expiration or earlier termination of the Lease. Interior signs on
doors and the directory tablet shall be inscribed, painted or affixed for Tenant by Landlord at Tenant’s sole cost and expense, and shall be of a size, color and type and be located in a place acceptable to Landlord. The directory tablet shall
be provided exclusively for the display of the name and location of tenants only. Tenant shall not place anything on the exterior of the corridor walls or corridor doors other than Landlord’s standard lettering. At Landlord’s option
subject to Tenant’s reasonable approval, Landlord may install any Tenant Signage, and Tenant shall pay all costs associated with such installation within thirty (30) days after demand therefor. 

12.8 Tenant shall only place equipment within the Premises with floor loading consistent with the Building’s structural design without
Landlord’s prior written approval, and such equipment shall be placed in a location designed to carry the weight of such equipment. 

12.9 Tenant shall cause any equipment or machinery to be installed in the Premises so as to reasonably prevent sounds or vibrations therefrom
from extending into the Common Areas or other offices in the Project. 
 12.10 Tenant shall not (a) do or permit anything to be done in
or about the Premises that shall in any way unreasonably obstruct or interfere with the rights of other tenants or occupants of the Project, or injure or annoy them, (b) use or allow the Premises to be used for unlawful

  
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purposes, (c) cause, maintain or permit any nuisance or waste in, on or about the Project or (d) take any other action that would in Landlord’s reasonable determination in any
manner adversely affect other tenants’ quiet use and enjoyment of their space or adversely impact their ability to conduct business in a professional and suitable work environment for uses similar to those permitted under this Lease. 

12.11 Notwithstanding any other provision herein to the contrary, Tenant shall be responsible for all liabilities, costs and expenses arising
out of or in connection with the compliance of the Premises with the Americans with Disabilities Act, 42 U.S.C. § 12101, et seq., and any state and local accessibility laws, codes, ordinances and rules (collectively, and together with
regulations promulgated pursuant thereto, the “ADA”), and Tenant shall indemnify, save, defend (at Landlord’s option and with counsel reasonably acceptable to Landlord) and hold Landlord and its affiliates, employees, agents
and contractors; and any lender, mortgagee or beneficiary (each, a “Lender” and, collectively with Landlord and its affiliates, employees, agents and contractors, the “Landlord Indemnitees”) harmless from and
against any demands, claims, liabilities, losses, costs, expenses, actions, causes of action, damages or judgments, and all reasonable expenses (including reasonable attorneys’ fees, charges and disbursements) incurred in investigating or
resisting the same (collectively, “Claims”) arising out of any such failure of the Premises to comply with the ADA; provided Tenant shall not be required to indemnify Landlord or be responsible for the cost to remediate
Hazardous Materials, except to the extent Tenant is responsible or liable for such remediation pursuant to Article 21. Tenant shall perform, at its sole cost and expense, any changes to the Premises required by the ADA after the Term
Commencement Date (unless required due to non-compliance existing as of the Term Commencement Date); provided that Landlord shall perform and pay for any such changes in the Premises that constitute a change to a Building system that extends
into other tenants’ premises (e.g., Building sprinkler systems). The provisions of this Section shall survive the expiration or earlier termination of this Lease. 

12.12 Subject to all other provisions of this Lease, Tenant shall have the right to continuous access to the Premises twenty-four
(24) hours per day, seven (7) days per week, except during reasonable closures for repairs or maintenance pursuant to the terms of this Lease, or as the result of casualty or other circumstances beyond Landlord’s control. 

13. Rules and Regulations, CC&Rs, Parking Facilities and Common Areas. 

13.1 Tenant shall, at no additional cost during the Term, have the non-exclusive right, in common with others, to use the Common Areas,
subject to the rules and regulations adopted by Landlord and attached hereto as Exhibit F. together with such other reasonable and nondiscriminatory rules and regulations as are hereafter promulgated by Landlord in its sole and absolute
discretion (the “Rules and Regulations”). Tenant shall faithfully observe and comply with the Rules and Regulations. Landlord shall not be responsible to Tenant for the violation or non-performance by any other tenant or any agent,
employee or invitee thereof of any of the Rules and Regulations. 
 13.2 This Lease is subject to any recorded covenants, conditions or
restrictions on the Project or Property (the “CC&Rs”). as the same may be amended, amended and restated, supplemented or otherwise modified from time to time; provided that any such amendments,

  
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restatements, supplements or modifications do not materially modify Tenant’s rights or obligations hereunder. Tenant shall comply with the CC&Rs. 

13.3 Tenant, at no additional cost during the Term, shall have a non-exclusive, irrevocable license to use Tenant’s Pro Rata Share of
parking facilities serving the Project in common on an unreserved basis with other tenants of the Project during the Term. 
 13.4 Tenant
agrees not to unreasonably overburden the parking facilities and agrees to cooperate with Landlord and other tenants in the use of the parking facilities. Landlord reserves the right to determine that parking facilities are becoming overcrowded and
to limit Tenant’s use thereof (provided that in no event shall Tenant be limited to less than Tenant’s Pro Rata Share of parking spaces). Upon such determination, Landlord may reasonably allocate parking spaces among Tenant and
other tenants of the Building or the Project. Nothing in this Section, however, is intended to create an affirmative duty on Landlord’s part to monitor parking. 

13.5 Landlord reserves the right to modify the Common Areas, including the right to add or remove exterior and interior landscaping and to
subdivide real property. Tenant acknowledges that Landlord specifically reserves the right to allow the exclusive use of corridors and restroom facilities located on specific floors to one or more tenants occupying such floors; provided,
however, that Tenant shall not be deprived of the use of the corridors reasonably required to serve the Premises or of restroom facilities serving the floor upon which the Premises are located. 

14. Project Control by Landlord. 
 14.1
Landlord reserves full control over the Building and the Project to the extent not inconsistent with Tenant’s enjoyment of the Premises and does not diminish Tenant’s parking rights in the Common Areas as provided by this Lease. This
reservation includes Landlord’s right to subdivide the Project; convert the Building to condominium units; change the size of the Project by selling all or a portion of the Project or adding real property and any improvements thereon to the
Project; grant easements and licenses to third parties; maintain or establish ownership of the Building separate from fee title to the Property; make additions to or reconstruct portions of the Building and the Project; install, use, maintain,
repair, replace and relocate for service to the Premises and other parts of the Building or the Project pipes, ducts, conduits, wires and appurtenant fixtures, wherever located in the Premises, the Building or elsewhere at the Project; and alter or
relocate any other Common Area or facility, including private drives, lobbies and entrances. 
 14.2 Possession of areas of the Premises
necessary for utilities, services, safety and operation of the Building is reserved to Landlord to the extent not inconsistent with Tenant’s enjoyment of the Premises. 

14.3 Tenant shall, at Landlord’s request, promptly execute such further documents as may be reasonably appropriate to assist Landlord in
the performance of its obligations hereunder; provided that Tenant need not execute any document that creates additional liability for Tenant or that deprives Tenant of the quiet enjoyment and use of the Premises or diminishes Tenant’s
parking rights in the Common Areas as provided for in this Lease. 

  
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 14.4 Landlord may, at any and all reasonable times during non-business hours (or during business
hours if Tenant so requests), and upon twenty-four (24) hours’ prior notice (provided that no time restrictions shall apply or advance notice be required if an emergency necessitates immediate entry), enter the Premises to
(a) inspect the same and to determine whether Tenant is in compliance with its obligations hereunder, (b) supply any service Landlord is required to provide hereunder, (c) show the Premises to prospective purchasers or tenants during
the final year of the Term, (d) post notices of nonresponsibility, (e) access the telephone equipment, electrical substation and fire risers and (f) alter, improve or repair any portion of the Building other than the Premises for
which access to the Premises is reasonably necessary. In connection with any such alteration, improvement or repair as described in Subsection 14.4(f). Landlord may erect in the Premises or elsewhere in the Project scaffolding and other
structures reasonably required for the alteration, improvement or repair work to be performed. In no event shall Tenant’s Rent abate as a result of Landlord’s activities pursuant to this Section; provided, however, that all
such activities shall be conducted in such a manner so as to cause as little interference to Tenant as is reasonably possible. Landlord shall at all times retain a key with which to unlock all of the doors in the Premises. If an emergency
necessitates immediate access to the Premises, Landlord may use whatever force is necessary to enter the Premises, and any such entry to the Premises shall not constitute a forcible or unlawful entry to the Premises, a detainer of the Premises, or
an eviction of Tenant from the Premises or any portion thereof. 
 15. Quiet Enjoyment. So long as Tenant is not in Default under this Lease,
Landlord or anyone acting through or under Landlord shall not disturb Tenant’s occupancy of the Premises, except as permitted by this Lease, 
 16.
Utilities and Services. 
 16.1 Tenant shall pay for all water (including the cost to service, repair and replace reverse osmosis,
de-ionized and other treated water), gas, heat, light, power, telephone, internet service, cable television, other telecommunications and other utilities supplied to the Premises, together with any fees, surcharges and taxes thereon. If any such
utility is not separately metered to Tenant, Tenant shall pay Tenant’s Share of all charges of such utility jointly metered with other premises as Additional Rent. To the extent that Tenant uses more than Tenant’s Pro Rata Share of any
utilities, then Tenant shall pay Landlord for Tenant’s Share of such utilities to reflect such excess. In the event that the Building or Project is less than fully occupied, Tenant acknowledges that Landlord may extrapolate utility usage that
vary depending on the occupancy of the Building or Project, as applicable, by dividing (a) the total cost of utility usage by (b) the Rentable Area of the Building or Project (as applicable) that is occupied, then multiplying (y) the
resulting quotient by (z) one hundred percent (100%) of the total Rentable Area of the Building or Project (as applicable). Tenant shall pay Tenant’s Share of the product of (y) and (z), subject to adjustment based on actual
usage as reasonably determined by Landlord; provided, however, that Landlord shall not recover more than one hundred percent (100%) of such utility costs. Further, in calculating utilities pursuant to the foregoing adjustment, Landlord
will endeavor to ensure that any vacant space is not being supplied with utilities, or if vacant space is being supplied with utilities, then such space will be deemed “occupied” for purposes of the foregoing calculation. 

  
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 16.2 Except as provided in this Section, Landlord shall not be liable for, nor shall any eviction
of Tenant result from, the failure to furnish any utility or service, whether or not such failure is caused by accident; breakage; repair; strike, lockout or other labor disturbance or labor dispute of any character; act of terrorism; shortage of
materials, which shortage is not unique to Landlord or Tenant, as the case may be; governmental regulation, moratorium or other governmental action, inaction or delay; or other causes beyond Landlord’s control (collectively, “Force
Majeure”) or Landlord’s negligence. In the event of such failure, Tenant shall not be entitled to termination of this Lease or any abatement or reduction of Rent, nor shall Tenant be relieved from the operation of any covenant or
agreement of this Lease, except as provided in Section 16.12. 
 16.3 Tenant shall pay for, prior to delinquency of payment therefor,
any utilities and services that may be furnished to the Premises during or, if Tenant occupies the Premises after the expiration or earlier termination of the Term, after the Term, beyond those utilities provided by Landlord, including telephone,
internet service, cable television and other telecommunications, together with any fees, surcharges and taxes thereon. Upon Landlord’s demand, utilities and services provided to the Premises that are separately metered shall be paid by Tenant
directly to the supplier of such utilities or services. 
 16.4 Tenant shall not, without Landlord’s prior written consent, use any
device in the Premises (including data processing machines) that will in any way (a) increase the amount of ventilation, air exchange, gas, steam, electricity or water required or consumed in the Premises based upon Tenant’s Pro Rata Share
of the Building or Project (as applicable) beyond the existing capacity of the Building or the Project usually furnished or supplied for the use set forth in Section 2.7 or (b) exceed Tenant’s Pro Rata Share of the
Building’s or Project’s (as applicable) capacity to provide such utilities or services. Nothing in this Section shall prohibit Tenant’s right to use any device commonly used for the Permitted Use, provided that such use
doesn’t violate this Lease. 
 16.5 If Tenant shall require utilities or services in excess of those usually furnished or supplied for
tenants in similar spaces in the Building or the Project by reason of Tenant’s equipment or extended hours of business operations, then Tenant shall first procure Landlord’s consent for the use thereof, which consent Landlord may condition
upon the availability of such excess utilities or services, and Tenant shall pay as Additional Rent an amount equal to the cost of providing such excess utilities and services. 

16.6 Upon Landlord’s demand, utilities and services provided to the Premises that are separately metered shall be paid by Tenant directly
to the supplier of such utility or service. 
 16.7 Landlord shall provide water in Common Areas for lavatory purposes only, which water
shall be from the local municipal or similar source; provided, however, that if Landlord determines that Tenant requires, uses or consumes water for any purpose other than ordinary lavatory purposes, Landlord may install a water meter
and thereby measure Tenant’s water consumption for all purposes. Tenant shall pay Landlord for the costs of such meter and the installation thereof and, throughout the duration of Tenant’s occupancy of the Premises, Tenant shall keep said
meter and installation equipment in good working order and repair at Tenant’s sole cost and expense. If Tenant fails to so maintain such meter and equipment, Landlord may 

  
 22 

 
repair or replace the same and shall collect the costs therefor from Tenant. Tenant agrees to pay for water consumed, as shown on said meter, as and when bills are rendered. If Tenant fails to
timely make such payments, Landlord may pay such charges and collect the same from Tenant. Any such costs or expenses incurred, or payments made by Landlord for any of the reasons or purposes hereinabove stated, shall be deemed to be Additional Rent
payment by Tenant and collectible by Landlord as such. 
 16.8 Landlord reserves the right to stop service of the elevator, plumbing,
ventilation, air conditioning and other utility systems, when Landlord deems necessary or desirable, due to accident, emergency or the need to make repairs, alterations or improvements, until such repairs, alterations or improvements shall have been
completed, and (except as provided in Section 16.2). Landlord shall further have no responsibility or liability for failure to supply elevator facilities, plumbing, ventilation, air conditioning or other utility service when prevented
from doing so by Force Majeure or Landlord’s negligence; a failure by a third party to deliver gas, oil or another suitable fuel supply; or Landlord’s inability by exercise of reasonable diligence to obtain gas, oil or another suitable
fuel. Without limiting the foregoing, it is expressly understood and agreed that any covenants on Landlord’s part to furnish any service pursuant to any of the terms, covenants, conditions, provisions or agreements of this Lease, or to perform
any act or thing for the benefit of Tenant, shall not be deemed breached if Landlord is unable to furnish or perform the same by virtue of Force Majeure or Landlord’s negligence. Landlord shall use commercially reasonable efforts (a) in
exercising its rights pursuant to this Section in a manner so as to minimize or prevent interference with Tenant’s use of or access to the Premises, (b) to perform such repairs outside of normal business hours and (c) except in
accident or emergency situations, to provide Tenant with prior written notice (email shall be deemed sufficient) in the event Landlord intends to stop service pursuant to this Section. 

16.9 Currently, there is a back-up generator located outside the northwest corner of the Building (the “Generator”). Landlord
shall connect the Generator to the Premises’ emergency electrical panel. Subject to power from the Generator dedicated to the Building, Tenant shall be entitled to use up to its proportionate share of the remaining power from the Generator on a
non-exclusive basis with other tenants in the Building. The cost of maintaining, repairing and replacing the Generator shall constitute Operating Expenses. Landlord expressly disclaims any warranties with regard to the Generator or the installation
thereof, including any warranty of merchantability or fitness for a particular purpose. Landlord shall maintain the Generator in good working condition, but shall not be liable for any failure to make any repairs or to perform any maintenance that
is an obligation of Landlord unless such failure shall persist for an unreasonable time after Tenant provides Landlord with written notice of the need for such repairs or maintenance. The provisions of Section 16.2 shall apply to the
Generator. 
 16.10 For the Premises, Landlord shall (a) maintain and operate the heating, ventilating and air conditioning systems
used for the Permitted Use only (“HVAC”) and (b) subject to clause (a) above, furnish HVAC as reasonably required (except as this Lease otherwise provides) for reasonably comfortable occupancy of the Premises twenty-four
(24) hours a day, every day during the Term, subject to casualty, eminent domain or as otherwise specified in this Article. Notwithstanding anything to the contrary in this Section (except as provided in Section 16.2). Landlord
shall have no liability, and Tenant shall have no right or remedy, on account of any 

  
 23 

 
interruption or impairment in HVAC services; provided that Landlord diligently endeavors to cure any such interruption or impairment. 

16.11 Tenant shall retain records of utility usage at the Premises, including invoices and statements from the utility provider, for at least
twelve (12) months and, upon request by Landlord, shall furnish such invoices and statements to Landlord. Tenant acknowledges that any utility information for the Premises, the Building and the Project may be shared with third parties,
including Landlord’s consultants and Governmental Authorities. In the event that Tenant fails to comply with this Section, Tenant hereby authorizes Landlord, and shall also sign the appropriate documentation to allow Landlord, to collect
utility usage information directly from the applicable utility providers. 
 16.12 In the event that Tenant is prevented from using, and
does not use, the Premises or any material portion thereof for five (5) consecutive business days or after ten (10) non-consecutive business days within any twelve (12) month period during the Term (the “Eligibility
Period”) as a result of (a) any failure by Landlord to provide to the Premises any of the essential utilities and services required to be provided in this Article, or (b) any failure by Landlord to provide access to the Premises,
or (c) any failure by Landlord to perform any repairs required to be performed by Landlord under Section 18.1 below, within a reasonable time after Landlord has received notice from Tenant of the need for such repairs, but in no
event longer than thirty (30) days (or such longer period of time as is reasonably required for such repair work if Landlord diligently commences such repair work within such thirty (30) day period and thereafter diligently prosecutes same
to completion), or (d) any renovations of the Building undertaken by Landlord pursuant to Section 14.1, then Tenant’s obligation to pay Base Rent and Tenant’s Pro Rata Share of Operating Expenses shall be abated or
reduced, as the case may be, from and after the first (1st) day following the Eligibility Period and continuing until such time that Tenant continues to be so prevented from using, and does
not use, the Premises or a portion thereof, in the proportion that the square feet of Rentable Area of the portion of the Premises that Tenant is prevented from using and does not use bears to the total square feet of Rentable Area of the Premises;
provided, however, that Tenant shall only be entitled to such abatement to the extent that the matter described in clause (a), (b), (c) or (d) above arises out of or results from a matter within Landlord’s reasonable
control. To the extent Tenant shall be entitled to abatement because of damage or destruction pursuant to Article 24 or a taking pursuant to Article 25, then the terms of this Section 16.12 shall not be applicable thereto.

 17. Alterations. 
 17.1 Tenant shall
make no alterations, additions or improvements in or to the Premises or engage in any construction, demolition, reconstruction, renovation, or other work (whether major or minor) of any kind in, at, or serving the Premises
(“Alterations”) without Landlord’s prior written approval, which approval Landlord shall not unreasonably withhold; provided, however, that in the event any proposed Alteration affects (a) any structural
portions of the Building, including exterior walls, roof, foundation, foundation systems (including barriers and subslab systems), or core of the Building, (b) the exterior of the Building or (c) any Building systems, including elevator,
plumbing, air conditioning, heating, electrical, security, life safety and power, then Landlord may withhold its approval with respect thereto in its sole and absolute 

  
 24 

 
discretion. Tenant shall, in making any such Alterations, use only those architects, contractors, suppliers and mechanics of which Landlord has given prior written approval, which approval
shall be in Landlord’s sole and absolute discretion. In seeking Landlord’s approval, Tenant shall provide Landlord, at least fourteen (14) days in advance of any proposed construction, with plans, specifications, bid proposals,
certified stamped engineering drawings and calculations by Tenant’s engineer of record or architect of record (including connections to the Building’s structural system, modifications to the Building’s envelope, non-structural
penetrations in slabs or walls, and modifications or tie-ins to life safety systems), work contracts, requests for laydown areas and such other information concerning the nature and cost of the Alterations as Landlord may reasonably request. In no
event shall Tenant use or Landlord be required to approve any architects, consultants, contractors, subcontractors or material suppliers that Landlord reasonably believes could cause labor disharmony. Notwithstanding the foregoing, Tenant may make
strictly cosmetic changes to the Premises (“Cosmetic Alterations”) without Landlord’s consent; provided that (y) the cost of any Cosmetic Alterations does not exceed Fifty Thousand Dollars ($50,000) in
any one instance or One Hundred Thousand Dollars ($100,000) annually, (z) such Cosmetic Alterations do not (i) require any structural or other substantial modifications to the Premises, (ii) require any changes to, or adversely
affect, the Building systems, (iii) affect the exterior of the Building or (iv) trigger any requirement under Applicable Laws that would require Landlord to make any alteration or improvement to the Premises, the Building or the Project.
Tenant shall give Landlord at least ten (10) days’ prior written notice of any Cosmetic Alterations. 
 17.2 Tenant shall
not construct or permit to be constructed partitions or other obstructions that might interfere with free access to mechanical installation or service facilities of the Building or with other tenants’ components located within the Building, or
interfere with the moving of Landlord’s equipment to or from the enclosures containing such installations or facilities. 
 17.3 Tenant
shall accomplish any work performed on the Premises or the Building in such a manner as to permit any life safety systems to remain fully operable at all times. 

17.4 Any work performed on the Premises, the Building or the Project by Tenant or Tenant’s contractors shall be done at such times and in
such manner as Landlord may from time to time designate. Tenant covenants and agrees that all work done by Tenant or Tenant’s contractors shall be performed in full compliance with Applicable Laws. Within thirty (30) days after completion
of any Alterations, Tenant shall provide Landlord with complete “as-built” drawing print sets and electronic CADD files on disc (or files in such other current format in common use as Landlord reasonably approves or requires) showing any
changes in the Premises. 
 17.5 Before commencing any Alterations, Tenant shall give Landlord at least fourteen (14) days’ prior
written notice of the proposed commencement of such work and if the cost of such Alterations is expected to exceed One Hundred Thousand Dollars ($100,000), Tenant shall, if required by Landlord, secure, at Tenant’s own cost and expense, a
completion and lien indemnity bond satisfactory to Landlord for said work. 
 17.6 All Alterations, attached equipment, decorations,
fixtures, movable laboratory casework and related appliances, trade fixtures, additions and improvements attached to or built 

  
 25 

 
into the Premises and paid for and installed by Tenant (collectively, “Tenant Equipment”), shall (unless, prior to such construction or installation, the parties agree
otherwise) remain the property of Tenant upon the expiration or earlier termination of the Term, and Tenant shall remove such Tenant Equipment from the Premises and repair and restore the Premises to its original condition as of the applicable Term
Commencement Date. The Premises shall at all times remain the property of Landlord and shall be surrendered to Landlord upon the expiration or earlier termination of this Lease. All Tenant Improvements, Alterations, attached equipment, decorations,
fixtures, movable laboratory casework and related appliances, trade fixtures, additions and improvements attached to or built into the Premises, and paid for, or installed by, Landlord and any Signage shall be the property of Landlord, shall not be
moved by Tenant at any time during the Term and shall be surrendered with the Premises as a part thereof. 
 17.7 Tenant shall repair
any damage to the Premises caused by Tenant’s removal of any property (including Tenant Equipment) from the Premises. During any such restoration period, Tenant shall pay Rent to Landlord as provided herein as if said space were otherwise
occupied by Tenant. The provisions of this Section shall survive the expiration or earlier termination of this Lease. 
 17.8 If Tenant
shall fail to remove any of its effects from the Premises prior to termination of this Lease, then Landlord may, at its option, remove the same in any manner that Landlord shall choose and store said effects without liability to Tenant for loss
thereof or damage thereto, and Tenant shall pay Landlord, upon demand, any costs and expenses incurred due to such removal and storage or Landlord may, at its sole option and without notice to Tenant, sell such property or any portion thereof at
private sale and without legal process for such price as Landlord may obtain and apply the proceeds of such sale against any (a) amounts due by Tenant to Landlord under this Lease and (b) any expenses incident to the removal, storage and
sale of said personal property. 
 17.9 Notwithstanding any other provision of this Article to the contrary, in no event shall Tenant remove
any improvement from the Premises as to which Landlord contributed payment, including the Tenant Improvements, without Landlord’s prior written consent, which consent Landlord may withhold in its sole and absolute discretion. 

17.10 To the extent Alterations require Landlord’s plan review, coordination, scheduling or supervision thereof, Tenant shall pay to
Landlord an amount equal to three percent (3%) of the cost to Tenant of all Alterations exceeding One Hundred Thousand Dollars ($100,000) per occurrence (but specifically excluding Cosmetic Alterations and any work related to installation of
Tenant’s equipment and trade fixtures) installed by Tenant or its contractors or agents to cover Landlord’s overhead and expenses for plan review, coordination, scheduling and supervision thereof; provided, however, that, in
the event Landlord (in its reasonable discretion) does not perform any plan review, coordination, scheduling or supervision of such Alterations, then Tenant shall not be required to pay such fee. For purposes of payment of such sum, Tenant shall
submit to Landlord copies of all bills, invoices and statements covering the costs of such charges, accompanied by payment to Landlord of the fee set forth in this Section. Tenant shall reimburse Landlord for any extra expenses incurred by Landlord
by reason of faulty work done 

  
 26 

 
by Tenant or its contractors, or by reason of delays caused by such work, or by reason of inadequate clean-up. 

17.11 Within sixty (60) days after final completion of the Tenant Improvements (or any other Alterations performed by Tenant with respect
to the Premises), Tenant shall submit to Landlord documentation showing the amounts expended by Tenant with respect to such Tenant Improvements (or any other Alterations performed by Tenant with respect to the Premises), together with supporting
documentation reasonably acceptable to Landlord. 
 17.12 Tenant shall take, and shall cause its contractors to take, commercially
reasonable steps to protect the Premises during the performance of any Alterations, including covering or temporarily removing any window coverings so as to guard against dust, debris or damage. 

17.13 Tenant shall require its contractors and subcontractors performing work on the Premises to name Landlord and its affiliates and Lenders
as additional insureds on their respective insurance policies. 
 18. Repairs and Maintenance. 

18.1 Landlord shall repair and maintain the structural and exterior portions and Common Areas of the Building and the Project, including
roofing and covering materials; foundations; exterior walls; plumbing; fire sprinkler systems (if any); heating, ventilating, air conditioning systems; elevators; and electrical systems installed or furnished by Landlord. 

18.2 Except for services of Landlord, if any, required by Section 18.1, Tenant shall at Tenant’s sole cost and expense
maintain and keep the Premises and every part thereof in good condition and repair, damage thereto from ordinary wear and tear excepted. Tenant shall, upon the expiration or sooner termination of the Term, surrender the Premises to Landlord in as
good a condition as when received, ordinary wear and tear excepted; and shall, at Landlord’s request, remove all telephone and data systems, wiring and equipment from the Premises which was installed by or on behalf of Tenant or at
Tenant’s request, including the Tenant Improvements, and repair any damage to the Premises caused thereby. Landlord shall have no obligation to alter, remodel, improve, repair, decorate or paint the Premises or any part thereof, other than
pursuant to the terms and provisions of the Work Letter. 
 18.3 Except as provided in Section 16.2, Landlord shall not be
liable for any failure to make any repairs or to perform any maintenance that is an obligation of Landlord unless such failure shall persist for an unreasonable time after Tenant provides Landlord with written notice of the need of such repairs or
maintenance. Tenant waives its rights under Applicable Laws now or hereafter in effect to make repairs at Landlord’s expense. 
 18.4
If any excavation shall be made upon land adjacent to or under the Building, or shall be authorized to be made, Tenant shall afford to the person causing or authorized to cause such excavation, license to enter the Premises for the purpose of
performing such work as said person shall deem necessary or desirable to preserve and protect the Building from injury or damage and to support the same by proper foundations, without any claim for damages or liability against Landlord and without
reducing or otherwise affecting Tenant’s obligations under 

  
 27 

 
this Lease. Landlord shall use commercially reasonable efforts in conducting any such work to minimize or prevent interference with Tenant’s use of or access to the Premises. 

18.5 This Article relates to repairs and maintenance arising in the ordinary course of operation of the Building and the Project. In the event
of a casualty described in Article 24, Article 24 shall apply in lieu of this Article. In the event of eminent domain, Article 25 shall apply in lieu of this Article. 

18.6 Costs incurred by Landlord pursuant to this Article shall constitute Operating Expenses (but only to the extent includable in the
definition of Operating Expenses), unless such costs are incurred due in whole or in part to any act, neglect, fault or omissions of Tenant or its employees, agents, contractors or invitees, in which case Tenant shall pay to Landlord the cost of
such repairs and maintenance. 
 19. Liens. 

19.1 Subject to the immediately succeeding sentence, Tenant shall keep the Premises, the Building and the Project free from any liens arising
out of work performed, materials furnished or obligations incurred by Tenant. Tenant further covenants and agrees that any mechanic’s lien filed against the Premises, the Building or the Project for work claimed to have been done for, or
materials claimed to have been furnished to, shall be discharged or bonded by Tenant within ten (10) days after the filing thereof, at Tenant’s sole cost and expense; provided that Tenant shall not be responsible for any liens
resulting from the Tenant Improvements installed by Landlord pursuant to the Work Letter. 
 19.2 Should Tenant fail to discharge or bond
against any lien of the nature described in Section 19.1, Landlord may, at Landlord’s election, pay such claim or post a bond or otherwise provide security to eliminate the lien as a claim against title, and Tenant shall immediately
reimburse Landlord for the costs thereof as Additional Rent. Tenant shall indemnify, save, defend (at Landlord’s option and with counsel reasonably acceptable to Landlord) and hold the Landlord Indemnitees harmless from and against any Claims
arising from any such liens, including any administrative, court or other legal proceedings related to such liens. 
 19.3 In the event that
Tenant leases or finances the acquisition of office equipment, furnishings or other personal property of a removable nature utilized by Tenant in the operation of Tenant’s business, Tenant warrants that any Uniform Commercial Code financing
statement shall, upon its face or by exhibit thereto, indicate that such financing statement is applicable only to removable personal property of Tenant located within the Premises. In no event shall the address of the Premises, the Building or the
Project be furnished on a financing statement without qualifying language as to applicability of the lien only to removable personal property located in an identified suite leased by Tenant. Should any holder of a financing statement record or place
of record a financing statement that appears to constitute a lien against any interest of Landlord or against equipment that may be located other than within an identified suite leased by Tenant, Tenant shall, within ten (10) days after filing
such financing statement, cause (a) a copy of the Lender security agreement or other documents to which the financing statement pertains to be furnished to Landlord to facilitate Landlord’s ability to demonstrate that the lien of such
financing statement is not applicable to Landlord’s interest and (b) Tenant’s 

  
 28 

 
Lender to amend such financing statement and any other documents of record to clarify that any liens imposed thereby are not applicable to any interest of Landlord in the Premises, the Building
or the Project. 
 20. Estoppel Certificate. Tenant shall, within ten (10) days of receipt of written notice from Landlord, execute, acknowledge
and deliver a statement in writing substantially in the form attached to this Lease as Exhibit G, or on any other form reasonably requested by a proposed Lender or purchaser, (a) certifying that this Lease is unmodified and in full force
and effect (or, if modified, stating the nature of such modification and certifying that this Lease as so modified is in full force and effect) and the dates to which rental and other charges are paid in advance, if any, (b) acknowledging that
there are not, to Tenant’s knowledge, any uncured defaults on the part of Landlord hereunder, or specifying such defaults if any are claimed, and (c) setting forth such further information with respect to this Lease or the Premises as may
be requested thereon. Any such statement may be relied upon by any prospective purchaser or encumbrancer of all or any portion of the real property of which the Premises are apart. Tenant’s failure to deliver such statement within such the
prescribed time shall, at Landlord’s option, constitute a Default (as defined below) under this Lease, and, in any event, shall be binding upon Tenant that the Lease is in full force and effect and without modification except as may be
represented by Landlord in any certificate prepared by Landlord and delivered to Tenant for execution. 
 21. Hazardous Materials. 

21.1 Tenant shall not cause or permit any Hazardous Materials (as defined below) to be brought upon, kept or used in or about the Premises,
the Building or the Project in violation of Applicable Laws by Tenant or its employees, agents, contractors or invitees. If Tenant breaches such obligation, or if the presence of Hazardous Materials as a result of such a breach results in
contamination of the Project, any portion thereof, or any adjacent property, or if contamination of the Project, any portion thereof, or any adjacent property by Hazardous Materials otherwise occurs during the Term or any extension or renewal hereof
or holding over hereunder (other than if such contamination results from (a) migration of Hazardous Materials from outside the Premises caused by Tenant or its employees, agents, contractors or invitees, or (b) to the extent such
contamination is solely caused by Landlord’s gross negligence or willful misconduct, then Tenant shall indemnify, save, defend (at Landlord’s option and with counsel reasonably acceptable to Landlord) and hold the Landlord Indemnitees
harmless from and against any and all Claims, including (a) diminution in value of the Project or any portion thereof, (b) damages for the loss or restriction on use of rentable or usable space or of any amenity of the Project,
(c) damages arising from any adverse impact on marketing of space in the Project or any portion thereof and (d) sums paid in settlement of Claims that arise during or after the Term as a result of such breach or contamination. This
indemnification by Tenant includes costs incurred in connection with any investigation of site conditions or any clean-up, remedial, removal or restoration work required by any Governmental Authority because of Hazardous Materials present in the
air, soil or groundwater above, on or under or about the Project. Without limiting the foregoing, if the presence of any Hazardous Materials in, on, under or about the Project, any portion thereof or any adjacent property caused or permitted by
Tenant results in any contamination of the Project, any portion thereof or any adjacent property, then Tenant shall promptly take all actions at its sole cost and expense as are necessary to return the Project, any

  
 29 

 
portion thereof or any adjacent property to its respective condition existing prior to the time of such contamination; provided that Landlord’s written approval of such action
shall first be obtained, which approval Landlord shall not unreasonably withhold; and provided, further, that it shall be reasonable for Landlord to withhold its consent if such actions could have a material adverse long-term or
short-term effect on the Project, any portion thereof or any adjacent property. Notwithstanding the foregoing, Landlord shall indemnify, save, defend (at Tenant’s option and with counsel reasonably acceptable to Tenant) and hold Tenant and its
affiliates, employees, agents and contractors harmless from and against any and all Claims resulting from the presence of Hazardous Materials at the Project in violation of Applicable Laws as of the Execution Date, unless placed at the Project by
Tenant or its affiliates, employees, agents or contractors. 
 21.2 Landlord acknowledges that it is not the intent of this Article
to prohibit Tenant from operating its business for the Permitted Use. Tenant may operate its business according to the custom of Tenant’s industry so long as the use or presence of Hazardous Materials is strictly and properly monitored in
accordance with Applicable Laws. As a material inducement to Landlord to allow Tenant to use Hazardous Materials in connection with its business, Tenant agrees to deliver to Landlord prior to the applicable Term Commencement Date a list identifying
each type of Hazardous Material to be present at the Project and setting forth any and all governmental approvals or permits required in connection with the presence of such Hazardous Material at the Project (the “Hazardous Materials
List”). Tenant shall deliver to Landlord an updated Hazardous Materials List on or prior to each annual anniversary of the Phase 1 Term Commencement Date and shall also deliver an updated Hazardous Materials List before any new
Hazardous Materials are brought to the Project. Tenant shall deliver to Landlord true and correct copies of the following documents (hereinafter referred to as the “Documents”) relating to the handling, storage, disposal and
emission of Hazardous Materials prior to the Phase 1 Term Commencement Date or, if unavailable at that time, concurrently with the receipt from or submission to any Governmental Authority: permits; approvals; reports and correspondence; storage
and management plans; notices of violations of Applicable Laws; plans relating to the installation of any storage tanks to be installed in, on, under or about the Project (provided that installation of storage tanks shall only be permitted
after Landlord has given Tenant its written consent to do so, which consent Landlord may withhold in its sole and absolute discretion); and all closure plans or any other documents required by any and all Governmental Authorities for any storage
tanks installed in, on, under or about the Project for the closure of any such storage tanks. Tenant shall not be required, however, to provide Landlord with any portion of the Documents containing information of a proprietary nature, which
Documents, in and of themselves, do not contain a reference to any Hazardous Materials or activities related to Hazardous Materials. 
 21.3
[Intentionally Omitted] 
 21.4 At any time, and from time to time, prior to the expiration of the Term, Landlord shall have the right to
conduct appropriate tests of the Project or any portion thereof to demonstrate that Hazardous Materials are present or that contamination has occurred due to Tenant or Tenant’s employees, agents, contractors or invitees. Tenant shall pay all
reasonable 

  
 30 

 
costs of such tests if such tests reveal that Hazardous Materials exist at the Project in violation of this Lease. 

21.5 If underground or other storage tanks storing Hazardous Materials are located on the Premises or are hereafter placed on the Premises by
any party, Tenant shall monitor the storage tanks, maintain appropriate records, implement reporting procedures, properly close any underground storage tanks, and take or cause to be taken all other steps necessary or required under the Applicable
Laws. 
 21.6 Tenant shall promptly report to Landlord any actual or suspected presence of mold or water intrusion at the Premises. 

21.7 Tenant’s obligations under this Article shall survive the expiration or earlier termination of the Lease. During any period of time
needed by Tenant or Landlord after the termination of this Lease to complete the removal from the Premises of any such Hazardous Materials, Tenant shall be deemed a holdover tenant and subject to the provisions of Article 27 below. 

21.8 As used herein, the term “Hazardous Material” means any hazardous or toxic substance, material or waste that is or
becomes regulated by any Governmental Authority. 
 21.9 Notwithstanding anything to the contrary in this Lease, Landlord shall have sole
control over the equitable allocation of fire control areas (as defined in the Uniform Building Code as adopted by the city or municipality(ies) in which the Project is located (the “UBC”)) within the Project for the storage of
Hazardous Materials. Notwithstanding anything to the contrary in this Lease, the quantity of Hazardous Materials allowed by this Section 21.9 is specific to Tenant and shall not run with the Lease in the event of a Transfer (as defined
in Article 29). In the event of a Transfer, if the use of Hazardous Materials by such new tenant (“New Tenant”) is such that New Tenant utilizes fire control areas in the Project in excess of New Tenant’s Pro Rata Share
of the Building or the Project, as applicable, then New Tenant shall, at its sole cost and expense and upon Landlord’s written request, establish and maintain a separate area of the Premises classified by the UBC as an “H” occupancy
area for the use and storage of Hazardous Materials, or take such other action as is necessary to ensure that its share of the fire control areas of the Building and the Project is not greater than New Tenant’s Pro Rata Share of the Building or
the Project, as applicable. 
 22. Odors and Exhaust. Tenant acknowledges that Landlord would not enter into this Lease with Tenant unless Tenant
assured Landlord that under no circumstances will any other occupants of the Building or the Project (including persons legally present in any outdoor areas of the Project) be subjected to odors or fumes (whether or not noxious), and that the
Building and the Project will not be damaged by any exhaust, in each case from Tenant’s operations, including in Tenant’s vivarium. Landlord and Tenant therefore agree as follows: 

22.1 Tenant shall not cause or permit (or conduct any activities that would cause) any release of any odors or fumes of any kind from the
Premises. 

  
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 22.2 If the Building has a ventilation system that, in Landlord’s judgment, is adequate,
suitable, and appropriate to vent the Premises in a manner that does not release odors affecting any indoor or outdoor part of the Project, Tenant shall vent the Premises through such system. If Landlord at any time determines that any existing
ventilation system is inadequate, or if no ventilation system exists, Tenant shall in compliance with Applicable Laws vent all fumes and odors from the Premises (and remove odors from Tenant’s exhaust stream) as Landlord reasonably requires.
The placement and configuration of all ventilation exhaust pipes, louvers and other equipment shall be subject to Landlord’s approval. Tenant acknowledges Landlord’s legitimate desire to maintain the Project (indoor and outdoor areas) in
an odor-free manner, and Landlord may require Tenant to abate and remove all odors in a manner that goes beyond the requirements of Applicable Laws. 

22.3 Tenant shall, at Tenant’s sole cost and expense, provide odor eliminators and other devices (such as filters, air cleaners,
scrubbers and whatever other equipment may in Landlord’s judgment be necessary or appropriate from time to time) to completely remove, eliminate and abate any odors, fumes or other substances in Tenant’s exhaust stream that, in
Landlord’s judgment, emanate from Tenant’s Premises. Any work Tenant performs under this Section shall constitute Alterations. 

22.4 Tenant’s responsibility to remove, eliminate and abate odors, fumes and exhaust shall continue throughout the Term. Landlord’s
approval of the Tenant Improvements shall not preclude Landlord from requiring additional measures to eliminate odors, fumes and other adverse impacts of Tenant’s exhaust stream (as Landlord may designate in Landlord’s discretion). Tenant
shall install additional equipment as Landlord requires from time to time under the preceding sentence. Such installations shall constitute Alterations. 

22.5 If Tenant fails to install satisfactory odor control equipment within ten (10) business days after Landlord’s demand made at
any time, then Landlord may, without limiting Landlord’s other rights and remedies, require Tenant to cease and suspend any operations in the Premises that, in Landlord’s determination, cause odors, fumes or exhaust. For example, if
Landlord determines that Tenant’s production of a certain type of product causes odors, fumes or exhaust, and Tenant does not install satisfactory odor control equipment within ten (10) business days after Landlord’s request, then
Landlord may require Tenant to stop producing such type of product in the Premises unless and until Tenant has installed odor control equipment satisfactory to Landlord. 

23. Insurance; Waiver of Subrogation. 

23.1 Landlord shall maintain insurance for the Building and the Project in amounts equal to full replacement cost (exclusive of the costs of
excavation, foundations and footings, and without reference to depreciation taken by Landlord upon its books or tax returns) or such lesser coverage as Landlord may elect, provided that such coverage shall not be less than ninety percent
(90%) of such full replacement cost or the amount of such insurance Landlord’s Lender, if any, requires Landlord to maintain, providing protection against any peril generally included within the classification “Fire and Extended
Coverage,” together with insurance against sprinkler damage (if applicable), vandalism and malicious mischief. Landlord, subject to availability thereof, shall further insure, if Landlord deems it appropriate, coverage against flood,

  
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environmental hazard, earthquake, loss or failure of building equipment, rental loss during the period of repairs or rebuilding, workmen’s compensation insurance and fidelity bonds for
employees employed to perform services. Notwithstanding the foregoing, Landlord may, but shall not be deemed required to, provide insurance for any improvements installed by Tenant or that are in addition to the standard improvements customarily
furnished by Landlord, without regard to whether or not such are made a part of or are affixed to the Building. 
 23.2 In addition,
Landlord shall carry public liability insurance with a single limit of not less than One Million Dollars ($1,000,000) for death or bodily injury, or property damage with respect to the Project. 

23.3 Tenant shall, at its own cost and expense, procure and maintain in effect, beginning on the Phase 1 Term Commencement Date or the
date of occupancy, whichever occurs first, and continuing throughout the Term (and occupancy by Tenant, if any, after termination of this Lease) comprehensive liability insurance with limits of not less than Two Million Dollars ($2,000,000) per
occurrence for death or bodily injury and for property damage with respect to the Premises (including $ 100,000 fire legal liability (each loss)). 

23.4 The insurance required to be purchased and maintained by Tenant pursuant to this Lease shall name Landlord, BioMed Realty, L.P., BioMed
Realty Trust, Inc. and their respective officers, directors, employees, agents, general partners, members, subsidiaries, affiliates and Lenders (“Landlord Parties”) as additional insureds. Said insurance shall be with companies
authorized to do business in the state in which the Project is located and having a rating of not less than policyholder rating of A and financial category rating of at least Class XII in “Best’s Insurance Guide.” Tenant shall obtain
for Landlord from the insurance companies or cause the insurance companies to furnish certificates of coverage to Landlord. No such policy shall be cancelled or suffer a reduction of coverage or other modification or cancellation except after thirty
(30) days’ prior written notice to Landlord (except in the event of non-payment of premium, in which case ten (10) days written notice shall be given). All such policies shall be written as primary policies, not contributing with and
not in excess of the coverage that Landlord may carry. Tenant’s policy may be a “blanket policy” that specifically provides that the amount of insurance shall not be prejudiced by other losses covered by the policy. Tenant shall, at
least twenty (20) days prior to the expiration of such policies, furnish Landlord with renewals or binders. Tenant agrees that if Tenant does not take out and maintain such insurance, Landlord may (but shall not be required to) procure said
insurance on Tenant’s behalf and at its cost to be paid by Tenant as Additional Rent. 
 23.5 Tenant assumes the risk of damage to any
fixtures, goods, inventory, merchandise, equipment and leasehold improvements, and Landlord shall not be liable for injury to Tenant’s business or any loss of income therefrom, relative to such damage, all as more particularly set forth within
this Lease. Tenant shall, at Tenant’s sole cost and expense, carry such insurance as Tenant desires for Tenant’s protection with respect to personal property of Tenant or business interruption. 

23.6 In each instance where insurance is to name Landlord Parties as additional insureds, Tenant shall, upon Landlord’s written request,
also designate and furnish certificates evidencing such Landlord Parties as additional insureds to (a) any Lender of Landlord holding a 

  
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security interest in the Building, the Property or the Project, (b) the landlord under any lease whereunder Landlord is a tenant of the Property if the interest of Landlord is or shall
become that of a tenant under a ground lease rather than that of a fee owner and (c) any management company retained by Landlord to manage the Project. 

23.7 Landlord and Tenant each hereby waive any and all rights of recovery against the other or against the officers, directors, employees,
agents, general partners, members, subsidiaries, affiliates and Lenders of the other on account of loss or damage occasioned by such waiving party or its property or the property of others under such waiving party’s control, in each case to the
extent that such loss or damage is insured against under any fire and extended coverage insurance policy that either Landlord or Tenant may have in force at the time of such loss or damage, or would be insured against under any fire and extended
coverage insurance policy that either Landlord or Tenant is required to obtain under this Lease. Landlord and Tenant, upon obtaining the policies of insurance required or permitted under this Lease, shall give notice to the insurance carrier or
carriers that the foregoing mutual waiver of subrogation is contained in this Lease. If the release of either Landlord or Tenant, as set forth in the first sentence of this Section, shall contravene Applicable Laws, then the liability of the party
in question shall be deemed not released but shall be secondary to the other party’s insurer. 
 23.8 Landlord may require insurance
policy limits required under this Lease to be raised to conform with reasonable requirements of Landlord’s Lender or to bring coverage limits to levels then being reasonably required of new tenants within the Project. 

23.9 Any costs incurred by Landlord pursuant to this Article shall constitute a portion of Operating Expenses (but only to the extent
includable in the definition of Operating Expenses). 
 24. Damage or Destruction. 

24.1 In the event of a partial destruction of (a) the Premises or (b) Common Areas of the Building or the Project ((a) and
(b) together, the “Affected Areas”) by fire or other perils covered by extended coverage insurance not exceeding twenty-five percent (25%) of the full insurable value thereof, and provided that (x) the damage
thereto is such that the Affected Areas may be repaired, reconstructed or restored within a period of six (6) months from the date of the happening of such casualty, (y) Landlord shall receive insurance proceeds sufficient to cover the
cost of such repairs (except for any deductible amount provided by Landlord’s policy, which deductible amount, if paid by Landlord, shall constitute an Operating Expense) and (z) such casualty was not intentionally caused by Tenant or its
employees, agents or contractors, then Landlord shall commence and proceed diligently with the work of repair, reconstruction and restoration of the Affected Areas and this Lease shall continue in full force and effect. 

24.2 In the event of any damage to or destruction of the Building or the Project other than as described in Section 24.1, Landlord
may elect to repair, reconstruct and restore the Building or the Project, as applicable, in which case this Lease shall continue in full force and effect. If Landlord elects not to repair the Building or the Project, as applicable, then this Lease
shall terminate as of the date of such damage or destruction. 

  
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 24.3 Landlord shall give written notice to Tenant within sixty (60) days following the date
of damage or destruction of its election either to repair or not to repair, reconstruct or restore the Building or the Project, as applicable; provided, however, that (a) if Landlord does not elect to terminate this Lease pursuant
to Landlord’s termination right as provided above, and (b) the repair of such damage to the Premises cannot, in the reasonable opinion of Landlord, be completed within nine (9) months after the date of the damage, then Tenant may
elect to terminate this Lease by delivering written notice thereof to Landlord within fifteen (15) days after being notified by Landlord of the estimated length of time to repair the damage and destruction, which termination shall be effective
as of the date of such termination notice thereof to Landlord. 
 24.4 Upon any termination of this Lease under any of the provisions of
this Article, the parties shall be released thereby without further obligation to the other from the date possession of the Premises is surrendered to Landlord, except with regard to (a) items occurring prior to the damage or destruction and
(b) provisions of this Lease that, by their express terms, survive the expiration or earlier termination hereof. 
 24.5 In the event
of repair, reconstruction and restoration as provided in this Article, all Rent to be paid by Tenant under this Lease shall be abated proportionately based on the extent to which Tenant’s use of the Premises is impaired during the period of
such repair, reconstruction or restoration, unless Landlord provides Tenant with other space during the period of repair that, in Tenant’s reasonable opinion, is suitable for the temporary conduct of Tenant’s business; provided,
however, that the amount of such abatement shall be reduced by the proceeds of business interruption or loss of rental income insurance actually received by Tenant with respect to the Premises. 

24.6 Notwithstanding anything to the contrary contained in this Article, should Landlord be delayed or prevented from completing the repair,
reconstruction or restoration of the damage or destruction to the Premises after the occurrence of such damage or destruction by Force Majeure, then the time for Landlord to commence or complete repairs shall be extended on a day-for-day basis. 

24.7 If Landlord is obligated to or elects to repair, reconstruct or restore as herein provided, then Landlord shall be obligated to make such
repair, reconstruction or restoration only with regard to (a) those portions of the Premises that were originally provided at Landlord’s expense and (b) the Common Area portion of the Affected Areas. The repair, reconstruction or
restoration of improvements not originally provided by Landlord or at Landlord’s expense shall be the obligation of Tenant. In the event Tenant has elected to upgrade certain improvements from the Building Standard, Landlord shall, upon the
need for replacement due to an insured loss, provide only the Building Standard, unless Tenant again elects to upgrade such improvements and pay any incremental costs related thereto, except to the extent that excess insurance proceeds, if received,
are adequate to provide such upgrades, in addition to providing for basic repair, reconstruction and restoration of the Premises, the Building and the Project. 

24.8 Notwithstanding anything to the contrary contained in this Article, Landlord shall not have any obligation whatsoever to repair,
reconstruct or restore the Premises if the damage resulting from any casualty covered under this Article occurs during the last twenty-four (24)

  
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months of the Term or any extension thereof and it is estimated that the repair of such casualty would take more than ninety (90) days, or to the extent that insurance proceeds are not
available therefor. In addition, Tenant also shall have the right to terminate this Lease if the damage resulting from any casualty covered under this Article occurs during the last twenty-four (24) months of the Term or any extension thereof
and it is estimated that the repair of such casualty would take more than ninety (90) days. 
 24.9 Landlord’s obligation, should
it elect or be obligated to repair or rebuild, shall be limited to the Affected Areas. Tenant shall, at its expense, replace or fully repair all of Tenant’s personal property and any Alterations installed by Tenant existing at the time of such
damage or destruction. If Affected Areas are to be repaired in accordance with the foregoing, Landlord shall, subject to the requirements of any Lender of Landlord, make available to Tenant any portion of insurance proceeds it receives that are
allocable to the Alterations constructed by Tenant pursuant to this Lease; provided Landlord shall not make such proceeds available to Tenant during the continuance of any default by Tenant under this Lease. 

25. Eminent Domain. 
 25.1 In the event
(a) the whole of all Affected Areas or (b) such part thereof as shall substantially interfere with Tenant’s use and occupancy of the Premises for the Permitted Use shall be taken for any public or quasi-public purpose by any lawful
power or authority by exercise of the right of appropriation, condemnation or eminent domain, or sold to prevent such taking, Tenant or Landlord may terminate this Lease effective as of the date possession is required to be surrendered to said
authority, except with regard to (y) items occurring prior to the damage or destruction and (z) provisions of this Lease that, by their express terms, survive the expiration or earlier termination hereof. 

25.2 In the event of a partial taking of (a) the Building or the Project or (b) drives, walkways or parking areas serving the
Building or the Project for any public or quasi-public purpose by any lawful power or authority by exercise of right of appropriation, condemnation, or eminent domain, or sold to prevent such taking, then, without regard to whether any portion of
the Premises occupied by Tenant was so taken, Landlord may elect to terminate this Lease (except with regard to (a) items occurring prior to the damage or destruction and (b) provisions of this Lease that, by their express terms, survive
the expiration or earlier termination hereof} as of such taking if such taking is, in Landlord’s sole opinion, of a material nature such as to make it uneconomical to continue use of the unappropriated portion for purposes of renting office or
laboratory space. 
 25.3 Tenant shall be entitled to any award that is specifically awarded as compensation for (a) the taking of
Tenant’s personal property that was installed at Tenant’s expense and (b) the costs of Tenant moving to a new location. Except as set forth in the previous sentence, any award for such taking shall be the property of Landlord. 

25.4 If, upon any taking of the nature described in this Article, this Lease continues in effect, then Landlord shall promptly proceed to
restore the Affected Areas to substantially their same condition prior to such partial taking. To the extent such restoration is infeasible, as 

  
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determined by Landlord in its sole and absolute discretion, the Rent shall be decreased proportionately to reflect the loss of any portion of the Premises no longer available to Tenant. 

26. Surrender. 
 26.1 At least ten
(10) days prior to Tenant’s surrender of possession of any part of the Premises, Tenant shall provide Landlord with (a) a facility decommissioning and Hazardous Materials closure plan for the Premises (“Exit Survey”)
prepared by an independent third party reasonably acceptable to Landlord, and (b) written evidence of all appropriate governmental releases obtained by Tenant in accordance with Applicable Laws, including laws pertaining to the surrender of the
Premises. In addition, Tenant agrees to remain responsible after the surrender of the Premises for the remediation of any recognized environmental conditions set forth in the Exit Survey and compliance with any recommendations set forth in the Exit
Survey, but only to the extent such conditions or recommendations are the responsibility of Tenant pursuant to this Lease. Tenant’s obligations under this Section shall survive the expiration or earlier termination of the Lease. 

26.2 No surrender of possession of any part of the Premises shall release Tenant from any of its obligations hereunder, unless such surrender
is accepted in writing by Landlord. 
 26.3 The voluntary or other surrender of this Lease by Tenant shall not effect a merger with
Landlord’s fee title or leasehold interest in the Premises, the Building, the Property or the Project, unless Landlord consents in writing, and shall, at Landlord’s option, operate as an assignment to Landlord of any or all subleases. 

26.4 The voluntary or other surrender of any ground or other underlying lease that now exists or may hereafter be executed affecting the
Building or the Project, or a mutual cancellation thereof or of Landlord’s interest therein by Landlord and its lessor shall not effect a merger with Landlord’s fee title or leasehold interest in the Premises, the Building or the Property
and shall, at the option of the successor to Landlord’s interest in the Building or the Project, as applicable, operate as an assignment of this Lease. 

27. Holding Over. 
 27.1 If, with
Landlord’s prior written consent, Tenant holds possession of all or any part of the Premises after the Term, Tenant shall become a tenant from month to month after the expiration or earlier termination of the Term, and in such case Tenant shall
continue to pay (a) Base Rent in accordance with Article 7, and (b) any amounts for which Tenant would otherwise be liable under this Lease if the Lease were still in effect, including payments for Tenant’s Share of Operating
Expenses. Any such month-to-month tenancy shall be subject to every other term, covenant and agreement contained herein. 
 27.2
Notwithstanding the foregoing, if Tenant remains in possession of the Premises after the expiration or earlier termination of the Term without Landlord’s prior written consent, (a) Tenant shall become a tenant at sufferance subject to the
terms and conditions of this Lease, except that the monthly rent shall be equal to one hundred fifty percent (150%) of the Rent in effect during the last thirty (30) days of the Term, and (b) Tenant shall be liable to Landlord for

  
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any and all damages suffered by Landlord as a result of such holdover, including any lost rent or consequential, special and indirect damages. 

27.3 Acceptance by Landlord of Rent after the expiration or earlier termination of the Term shall not result in an extension, renewal or
reinstatement of this Lease. 
 27.4 The foregoing provisions of this Article are in addition to and do not affect Landlord’s right of
reentry or any other rights of Landlord hereunder or as otherwise provided by Applicable Laws. 
 28. Indemnification and Exculpation. 

28.1 Tenant agrees to indemnify, save, defend (at Landlord’s option and with counsel reasonably acceptable to Landlord) and hold the
Landlord Indemnitees harmless from and against any and all Claims arising from injury or death to any person or damage to any property occurring within or about the Premises, the Building, the Property or the Project arising directly or indirectly
out of Tenant’s or Tenant’s employees’, agents’, contractors’ or invitees’ use or occupancy of the Premises or a breach or default by Tenant in the performance of any of its obligations hereunder, except to the extent
caused by Landlord’s negligence or willful misconduct. 
 28.2 Notwithstanding any provision of Section 28.1 to the
contrary, Landlord shall not be liable to Tenant for, and Tenant assumes all risk of, damage to personal property or scientific research, including loss of records kept by Tenant within the Premises and damage or losses caused by fire, electrical
malfunction, gas explosion or water damage of any type (including broken water lines, malfunctioning fire sprinkler systems, roof leaks or stoppages of lines), unless any such loss is due to Landlord’s willful disregard of written notice by
Tenant of need for a repair that Landlord is responsible to make for an unreasonable period of time. Tenant further waives any claim for injury to Tenant’s business or loss of income relating to any such damage or destruction of personal
property as described in this Section. 
 28.3 Landlord shall not be liable for any damages arising from any act, omission or neglect of any
other tenant in the Building or the Project, or of any other third party. 
 28.4 Tenant acknowledges that security devices and services, if
any, while intended to deter crime, may not in given instances prevent theft or other criminal acts. Landlord shall not be liable for injuries or losses caused by criminal acts of third parties, and Tenant assumes the risk that any security device
or service may malfunction or otherwise be circumvented by a criminal. If Tenant desires protection against such criminal acts, then Tenant shall, at Tenant’s sole cost and expense, obtain appropriate insurance coverage. 

28.5 The provisions of this Article shall survive the expiration or earlier termination of this Lease. 

  
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 29. Assignment or Subletting. 

29.1 Except as hereinafter expressly permitted, Tenant shall not, either voluntarily or by operation of Applicable Laws, directly or
indirectly sell, hypothecate, assign, pledge, encumber or otherwise transfer this Lease, or sublet the Premises (each, a “Transfer”), without Landlord’s prior written consent, which shall not be unreasonably withheld.
Notwithstanding the foregoing, except during the continuance of any default by Tenant under this Lease and so long as Tenant has not been in Default more than once during the immediately preceding twelve (12) months and has not been in Default
more than twice during the Term, (a) Tenant shall have the right to Transfer without Landlord’s prior written consent the Premises or any part thereof to any person that as of the date of determination and at all times thereafter directly,
or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with Tenant or that becomes a parent or successor of Tenant by reason of merger, consolidation, public offering, reorganization, dissolution or
sale of stock, membership or partnership interests or assets (“Tenant’s Affiliate”), provided that Tenant shall notify Landlord in writing at least ten (10) days prior to the effectiveness of such Transfer (unless
Tenant is restricted from notifying Landlord prior to the effectiveness of such Transfer because of confidentiality restrictions on Tenant, in which case Tenant shall notify Landlord within ten (10) days following the effectiveness of such
Transfer) to Tenant’s Affiliate (an “Exempt Transfer”) and otherwise complies with the requirements of this Lease regarding such Transfer, and provided further that Tenant may not Transfer all or any portion of the
Premises to any Tenant Affiliate more than once during any twelve (12) month period or twice during the Term without Landlord’s prior written consent, and (b) Tenant shall have the right to sublease a portion of the Premises of
approximately three thousand (3,000) square feet to Abide Therapeutics for a portion of the Term, provided that Tenant shall notify Landlord in writing at least ten (10) days prior to the effectiveness of such Transfer to Abide
Therapeutics and otherwise complies with the requirements of this Lease regarding such Transfer. For purposes of Exempt Transfers, “control” requires both (x) owning (directly or indirectly) more than fifty percent (50%) of the
stock or other equity interests of another person and (y) possessing, directly or indirectly, the power to direct or cause the direction of the management and policies of such person. Notwithstanding the foregoing, the raising of capital by an
offering of stock or ownership interest in Tenant shall not be deemed a Transfer for purposes of this Lease and shall not require Landlord’s consent. Except for an Exempt Transfer, Tenant shall not perform a Transfer to or with an entity that
is a tenant at the Project or that is in discussions or negotiations with Landlord or an affiliate of Landlord to lease premises at the Project or a property owned by Landlord or an affiliate of Landlord. 

29.2 In the event Tenant desires to effect a Transfer, then, at least twenty-five (25) but not more than ninety (90) days prior to
the date when Tenant desires the assignment or sublease to be effective (the “Transfer Date”). Tenant shall provide written notice to Landlord (the “Transfer Notice”) containing information (including references)
concerning the character of the proposed transferee, assignee or sublessee; the Transfer Date; any ownership or commercial relationship between Tenant and the proposed transferee, assignee or sublessee; and the consideration and all other material
terms and conditions of the proposed Transfer, all in such detail as Landlord shall reasonably require. 

  
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 29.3 Landlord, in determining whether consent should be given to a proposed Transfer, may give
consideration to (a) the financial strength of such transferee, assignee or sublessee (notwithstanding Tenant remaining liable for Tenant’s performance), (b) any change in use that such transferee, assignee or sublessee proposes to
make in the use of the Premises and (c) Landlord’s desire to exercise its rights under Section 29.8 to cancel this Lease. In no event shall Landlord be deemed to be unreasonable for declining to consent to a Transfer to a
transferee, assignee or sublessee of poor reputation, lacking financial qualifications or seeking a change in the Permitted Use, or jeopardizing directly or indirectly the status of Landlord or any of Landlord’s affiliates as a Real Estate
Investment Trust under the Internal Revenue Code of 1986 (as the same may be amended from time to time, the “Revenue Code”). Notwithstanding anything contained in this Lease to the contrary, (w) no Transfer shall be consummated
on any basis such that the rental or other amounts to be paid by the occupant, assignee, manager or other transferee thereunder would be based, in whole or in part, on the income or profits derived by the business activities of such occupant,
assignee, manager or other transferee; (x) Tenant shall not furnish or render any services to an occupant, assignee, manager or other transferee with respect to whom transfer consideration is required to be paid, or manage or operate the
Premises or any capital additions so transferred, with respect to which transfer consideration is being paid; (y) Tenant shall not consummate a Transfer with any person in which Landlord owns an interest, directly or indirectly (by applying
constructive ownership rules set forth in Section 856(d)(5) of the Revenue Code); and (z) Tenant shall not consummate a Transfer with any person or in any manner that could cause any portion of the amounts received by Landlord pursuant to
this Lease or any sublease, license or other arrangement for the right to use, occupy or possess any portion of the Premises to fail to qualify as “rents from real property” within the meaning of Section 856(d) of the Revenue Code, or
any similar or successor provision thereto or which could cause any other income of Landlord to fail to qualify as income described in Section 856(c)(2) of the Revenue Code. 

29.4 As conditions precedent to Tenant subleasing the Premises or to Landlord considering a request by Tenant to Tenant’s transfer of
rights or sharing of the Premises, Landlord may require any or all of the following: 
 (a) Tenant shall remain fully liable under this
Lease during the unexpired Term; 
 (b) Tenant shall provide Landlord with evidence reasonably satisfactory to Landlord that the value of
Landlord’s interest under this Lease shall not be diminished or reduced by the proposed Transfer. Such evidence shall include evidence respecting the relevant business experience and financial responsibility and status of the proposed
transferee, assignee or sublessee; 
 (c) Tenant shall reimburse Landlord for Landlord’s actual costs and expenses, including
reasonable attorneys’ fees, charges and disbursements incurred in connection with the review, processing and documentation of such request; 

(d) If Tenant’s transfer of rights or sharing of the Premises provides for the receipt by, on behalf of or on account of Tenant of any
consideration of any kind whatsoever (including a premium rental for a sublease or lump sum payment for an assignment, but 

  
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excluding Tenant’s reasonable costs in marketing and subleasing the Premises) in excess of the rental and other charges due to Landlord under this Lease, Tenant shall pay fifty percent
(50%) of all of such excess to Landlord, after making deductions for any reasonable marketing expenses, tenant improvement funds expended by Tenant, alterations, cash concessions, brokerage commissions, attorneys’ fees and free rent
actually paid by Tenant. If said consideration consists of cash paid to Tenant, payment to Landlord shall be made upon receipt by Tenant of such cash payment; 

(e) The proposed transferee, assignee or sublessee shall agree that, in the event Landlord gives such proposed transferee, assignee or
sublessee notice that Tenant is in Default under this Lease, such proposed transferee, assignee or sublessee shall thereafter make all payments otherwise due Tenant directly to Landlord, which payments shall be received by Landlord without any
liability being incurred by Landlord, except to credit such payment against those due by Tenant under this Lease, and any such proposed transferee, assignee or sublessee shall agree to attorn to Landlord or its successors and assigns should this
Lease be terminated for any reason; provided, however, that in no event shall Landlord or its Lenders, successors or assigns be obligated to accept such attornment; 

(f) Landlord’s consent to any such Transfer shall be effected on Landlord’s forms; 

(g) A default by Tenant shall not then be continuing hereunder in any respect; 

(h) Such proposed transferee, assignee or sublessee’s use of the Premises shall be the same as the Permitted Use; 

(i) Landlord shall not be bound by any provision of any agreement pertaining to the Transfer, except for Landlord’s written consent to
the same; 
 (j) Tenant shall pay all transfer and other taxes (including interest and penalties) assessed or payable for any Transfer; 

(k) Landlord’s consent (or waiver of its rights) for any Transfer shall not waive Landlord’s right to consent to any later Transfer;

 (l) Tenant shall deliver to Landlord one executed copy of any and all written instruments evidencing or relating to the Transfer; and

 (m) A list of Hazardous Materials (as defined in Section 21.7), certified by the proposed transferee, assignee or sublessee
to be true and correct, that the proposed transferee, assignee or sublessee intends to use or store in the Premises. Additionally, Tenant shall deliver to Landlord, on or before the date any proposed transferee, assignee or sublessee takes occupancy
of the Premises, all of the items relating to Hazardous Materials of such proposed transferee, assignee or sublessee as described in Section 21.2. 

29.5 Any Transfer that is not in compliance with the provisions of this Article shall be void and shall, at the option of Landlord, terminate
this Lease. 

  
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 29.6 The consent by Landlord to a Transfer shall not relieve Tenant or proposed transferee,
assignee or sublessee from obtaining Landlord’s consent to any further Transfer, nor shall it release Tenant or any proposed transferee, assignee or sublessee of Tenant from full and primary liability under this Lease. 

29.7 Notwithstanding any Transfer, Tenant shall remain fully and primarily liable for the payment of all Rent and other sums due or to become
due hereunder, and for the full performance of all other terms, conditions and covenants to be kept and performed by Tenant. The acceptance of Rent or any other sum due hereunder, or the acceptance of performance of any other term, covenant or
condition thereof, from any person or entity other than Tenant shall not be deemed a waiver of any of the provisions of this Lease or a consent to any Transfer. 

29.8 If Tenant delivers to Landlord a Transfer Notice indicating a desire to transfer this Lease for substantially the remainder of the Term
to a proposed transferee, assignee or sublessee other than as provided within Section 29.4 or as permitted under this Lease as an Exempt Transfer, then Landlord shall have the option, exercisable by giving notice to Tenant at any time
within ten (10) days after Landlord’s receipt of such Transfer Notice, to terminate this Lease as of the date specified in the Transfer Notice as the Transfer Date, except for those provisions that, by their express terms, survive the
expiration or earlier termination hereof. If Landlord exercises such option, then Tenant shall have the right to withdraw such Transfer Notice by delivering to Landlord written notice of such election within five (5) days after Landlord’s
delivery of notice electing to exercise Landlord’s option to terminate this Lease. In the event Tenant withdraws the Transfer Notice as provided in this Section, this Lease shall continue in full force and effect. No failure of Landlord to
exercise its option to terminate this Lease shall be deemed to be Landlord’s consent to a proposed Transfer. 
 29.9 If Tenant sublets
the Premises or any portion thereof, Tenant hereby immediately and irrevocably assigns to Landlord, as security for Tenant’s obligations under this Lease, all rent from any such subletting, and appoints Landlord as assignee and attorney-in-fact
for Tenant, and Landlord (or a receiver for Tenant appointed on Landlord’s application) may collect such rent and apply it toward Tenant’s obligations under this Lease; provided that, until the occurrence of a Default (as defined
below) by Tenant, Tenant shall have the right to collect such rent. 
 30. Subordination, Non-Disturbance and Attornment. 

30.1 This Lease shall be subject and subordinate to the lien of any mortgage, deed of trust, or lease in which Landlord is tenant now or
hereafter in force against the Building or the Project and to all advances made or hereafter to be made upon the security thereof without the necessity of the execution and delivery of any further instruments on the part of Tenant to effectuate such
subordination. Notwithstanding the foregoing or anything in this Lease to the contrary, Tenant’s agreement to subordinate its interest under this Lease to a lien or ground lease not in existence as of the Execution Date of this Lease shall be
conditioned upon the holder of such lien, or a ground lessor, as applicable, confirming in writing that Tenant’s leasehold interest hereunder shall not be disturbed so long as no Default by Tenant exists under this Lease and acknowledging and
accepting Tenant’s prepayment of Base Rent set forth in Section 7.1. 

  
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Landlord represents and warrants to Tenant that as of the Execution Date no deed of trust, mortgage or ground lease exists on the Building or the Project. 

30.2 Notwithstanding the foregoing, Tenant shall execute and deliver upon demand such further instrument or instruments evidencing such
subordination of this Lease to the lien of any such mortgage or mortgages or deeds of trust or lease in which Landlord is tenant as may be required by Landlord; provided such subordination provides the non-disturbance protection for Tenant
provided for in Section 30.1. If any such mortgagee, beneficiary or landlord under a lease wherein Landlord is tenant (each, a “Mortgagee”) so elects, however, this Lease shall be deemed prior in lien to any such lease,
mortgage, or deed of trust upon or including the Premises regardless of date and Tenant shall execute a statement in writing to such effect at Landlord’s request. If Tenant fails to execute any document required from Tenant under this Section
within ten (10) days after written request therefor, Tenant hereby constitutes and appoints Landlord or its special attorney-in-fact to execute and deliver any such document or documents in the name of Tenant. Such power is coupled with an
interest and is irrevocable. 
 30.3 Upon written request of Landlord and opportunity for Tenant to review, Tenant agrees to execute any
Lease amendments not materially altering the terms of this Lease, if required by a mortgagee or beneficiary of a deed of trust encumbering real property of which the Premises constitute a part incident to the financing of the real property of which
the Premises constitute a part. 
 30.4 In the event any proceedings are brought for foreclosure, or in the event of the exercise of the
power of sale under any mortgage or deed of trust made by Landlord covering the Premises, Tenant shall at the election of the purchaser at such foreclosure or sale attorn to the purchaser upon any such foreclosure or sale and recognize such
purchaser as Landlord under this Lease. 
 31. Defaults and Remedies. 

31.1 Late payment by Tenant to Landlord of Rent and other sums due shall cause Landlord to incur costs not contemplated by this Lease, the
exact amount of which shall be extremely difficult and impracticable to ascertain. Such costs include processing and accounting charges and late charges that may he imposed on Landlord by the terms of any mortgage or trust deed covering the
Premises. Therefore, if any installment of Rent due from Tenant is not received by Landlord within three (3) days after such payment is due, Tenant shall pay to Landlord (a) an additional sum of six percent (6%) of the overdue Rent as
a late charge plus (b) interest at an annual rate (the “Default Rate”) equal to the lesser of (a) twelve percent (12%) and (b) the highest rate permitted by Applicable Laws; provided that, during each
twelve (12) month period during the Term, the foregoing additional sum and interest at the Default Rate shall not be charged on the first late payment of Rent during the applicable twelve (12) month period unless such payment of rent is
not received by Landlord within three (3) days after notice to Tenant that such payment is overdue. The parties agree that this late charge represents a fair and reasonable estimate of the costs that Landlord shall incur by reason of late
payment by Tenant and shall be payable as Additional Rent to Landlord due with the next installment of Rent or within five (5) business days after Landlord’s demand, whichever is earlier. Landlord’s acceptance of any Additional Rent
(including a late charge or any other amount hereunder) shall not be deemed an 

  
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extension of the date that Rent is due or prevent Landlord from pursuing any other rights or remedies under this Lease, at law or in equity. 

31.2 No payment by Tenant or receipt by Landlord of a lesser amount than the Rent payment herein stipulated shall be deemed to be other than
on account of the Rent, nor shall any endorsement or statement on any check or any letter accompanying any check or payment as Rent be deemed an accord and satisfaction, and Landlord may accept such check or payment without prejudice to
Landlord’s right to recover the balance of such Rent or pursue any other remedy provided in this Lease or in equity or at law. If a dispute shall arise as to any amount or sum of money to be paid by Tenant to Landlord hereunder, Tenant shall
have the right to make payment “under protest,” such payment shall not be regarded as a voluntary payment, and there shall survive the right on the part of Tenant to institute suit for recovery of the payment paid under protest. 

31.3 If Tenant fails to pay any sum of money required to be paid by it hereunder, or shall fail to perform any other act on its part to be
performed hereunder, in each case within the applicable cure period (if any) described in Section 31.4, then Landlord may, without waiving or releasing Tenant from any obligations of Tenant, but shall not be obligated to, make such
payment or perform such act; provided that such failure by Tenant unreasonably interfered with the use of the Building or the Project by any other tenant or with the efficient operation of the Building or the Project, or resulted or could
have resulted in a violation of Applicable Laws or the cancellation of an insurance policy maintained by Landlord. Notwithstanding the foregoing, in the event of an emergency, Landlord shall have the right to enter the Premises and act in accordance
with its rights as provided elsewhere in this Lease. In addition to the late charge described in Section 31.1, Tenant shall pay to Landlord as Additional Rent all sums so paid or incurred by Landlord, together with interest at the
Default Rate, computed from the date such sums were paid or incurred. 
 31.4 The occurrence of any one or more of the following events
shall constitute a “Default” hereunder by Tenant: 
 (a) Tenant abandons the Premises; 

(b) Tenant fails to make any payment of Rent, as and when due, or to satisfy its obligations under Article 19, where such failure shall
continue for a period of five (5) days after written notice thereof from Landlord to Tenant; 
 (c) Tenant fails to observe or perform
any obligation or covenant contained herein (other than described in Subsections 31.4(a) and 31.4(b)) to be performed by Tenant, where such failure continues for a period of twenty (20) days after written notice thereof from
Landlord to Tenant; provided that, if the nature of Tenant’s default is such that it reasonably requires more than twenty (20) days to cure, Tenant shall not be deemed to be in Default if Tenant commences such cure within said
twenty (20) day period and thereafter diligently prosecute the same to completion; and provided, further, that such cure is completed no later than forty-five (45) days after Tenant’s receipt of written notice from
Landlord; 
 (d) Tenant makes an assignment for the benefit of creditors; 

  
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 (e) A receiver, trustee or custodian is appointed to or does take title, possession or control of
all or substantially all of Tenant’s assets; 
 (f) Tenant files a voluntary petition under the United States Bankruptcy Code or any
successor statute (as the same may be amended from time to time, the “Bankruptcy Code”) or an order for relief is entered against Tenant pursuant to a voluntary or involuntary proceeding commenced under any chapter of the Bankruptcy
Code; 
 (g) Any involuntary petition is filed against Tenant under any chapter of the Bankruptcy Code and is not dismissed within one
hundred twenty (120) days; 
 (h) A default exists under the Convertible Promissory Note or the Side Letter (defined below), after
expiration of any applicable notice and cure periods; 
 (i) Tenant fails to deliver an estoppel certificate in accordance with Article
20; or 
 (j) Tenant’s interest in this Lease is attached, executed upon or otherwise judicially seized and such action is not
released within one hundred twenty (120) days of the action. 
 Notices given under this Section shall specify the alleged default and
shall demand that Tenant perform the provisions of this Lease or pay the Rent that is in arrears, as the case may be, within the applicable period of time, or quit the Premises. No such notice shall be deemed a forfeiture or a termination of this
Lease unless Landlord elects otherwise in such notice. 
 31.5 In the event of a Default by Tenant, and at any time thereafter, with or
without notice or demand and without limiting Landlord in the exercise of any right or remedy that Landlord may have, Landlord has the right to do any or all of the following: 

(a) Halt any Tenant Improvements and Alterations and order Tenant’s contractors, subcontractors, consultants, designers and material
suppliers to stop work; 
 (b) Terminate Tenant’s right to possession of the Premises by written notice to Tenant or by any lawful
means, in which case Tenant shall immediately surrender possession of the Premises to Landlord. In such event, Landlord shall have the immediate right to re-enter and remove all persons and property, and such property may be removed and stored in a
public warehouse or elsewhere at the cost and for the account of Tenant, all without service of notice or resort to legal process and without being deemed guilty of trespass or becoming liable for any loss or damage that may be occasioned thereby;
and 
 (c) Terminate this Lease, in which event Tenant shall immediately surrender possession of the Premises to Landlord. In such event,
Landlord shall have the immediate right to re-enter and remove all persons and property, and such property may be removed and stored in a public warehouse or elsewhere at the cost and for the account of Tenant, all without service of notice or
resort to legal process and without being deemed guilty of trespass or becoming liable 

  
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for any loss or damage that may be occasioned thereby. In the event that Landlord shall elect to so terminate this Lease, then Landlord shall be entitled to recover from Tenant all damages
incurred by Landlord by reason of Tenant’s Default, including: 
 (i) The worth at the time of award of any unpaid Rent that had
accrued at the time of such termination; plus 
 (ii) The worth at the time of award of the amount by which the unpaid Rent that would have
accrued during the period commencing with termination of the Lease and ending at the time of award exceeds that portion of the loss of Landlord’s rental income from the Premises that Tenant proves to Landlord’s reasonable satisfaction
could have been reasonably avoided; plus 
 (iii) The worth at the time of award of the amount by which the unpaid Rent for the balance of
the Term after the time of award exceeds that portion of the loss of Landlord’s rental income from the Premises that Tenant proves to Landlord’s reasonable satisfaction could have been reasonably avoided; plus 

(iv) Any other amount necessary to compensate Landlord for all the detriment caused by Tenant’s failure to perform its obligations under
this Lease or that in the ordinary course of things would be likely to result therefrom, including the cost of restoring the Premises to the condition required under the terms of this Lease, including any rent payments not otherwise chargeable to
Tenant (e.g., during any “free” rent period or rent holiday); plus 
 (v) At Landlord’s election, such other amounts in
addition to or in lieu of the foregoing as may be permitted from time to time by Applicable Laws. 
 As used in Subsections 31.5(c)(i) and
31.5(c)(ii), “worth at the time of award” shall be computed by allowing interest at the Default Rate. As used in Subsection 31.5(c)(iii), the “worth at the time of the award” shall be computed by taking the present
value of such amount, using the discount rate of the Federal Reserve Bank of San Francisco at the time of the award plus one (1) percentage point. 

31.6 In addition to any other remedies available to Landlord at law or in equity and under this Lease, Landlord shall have the remedy
described in California Civil Code Section 1951.4 and may continue this Lease in effect after Tenant’s Default and abandonment and recover Rent as it becomes due, provided Tenant has the right to sublet or assign, subject only to
reasonable limitations. In addition, Landlord shall not be liable in any way whatsoever for its failure or refusal to relet the Premises. For purposes of this Section, the following acts by Landlord will not constitute the termination of
Tenant’s right to possession of the Premises: 
 (a) Acts of maintenance or preservation or efforts to relet the Premises, including
alterations, remodeling, redecorating, repairs, replacements or painting as Landlord shall consider advisable for the purpose of reletting the Premises or any part thereof; or 

(b) The appointment of a receiver upon the initiative of Landlord to protect Landlord’s interest under this Lease or in the Premises.

  
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 Notwithstanding the foregoing, in the event of a Default by Tenant, Landlord may elect at any time to terminate
this Lease and to recover damages to which Landlord is entitled. 
 31.7 If Landlord does not elect to terminate this Lease as provided in
Section 31.5, then Landlord may, from time to time, recover all Rent as it becomes due under this Lease. At any time thereafter, Landlord may elect to terminate this Lease and to recover damages to which Landlord is entitled. 

31.8 In the event Landlord elects to terminate this Lease and relet the Premises, Landlord may execute any new lease in its own name. Tenant
hereunder shall have no right or authority whatsoever to collect any Rent from such tenant. The proceeds of any such reletting shall be applied as follows: 

(a) First, to the payment of any indebtedness other than Rent due hereunder from Tenant to Landlord, including storage charges or brokerage
commissions owing from Tenant to Landlord as the result of such reletting; 
 (b) Second, to the payment of the costs and expenses of
reletting the Premises, including (i) alterations and repairs that Landlord deems reasonably necessary and advisable and (ii) reasonable attorneys’ fees, charges and disbursements incurred by Landlord in connection with the retaking
of the Premises and such reletting; 
 (c) Third, to the payment of Rent and other charges due and unpaid hereunder; and 

(d) Fourth, to the payment of future Rent and other damages payable by Tenant under this Lease. 

31.9 All of Landlord’s rights, options and remedies hereunder shall be construed and held to be nonexclusive and cumulative. Landlord
shall have the right to pursue any one or all of such remedies, or any other remedy or relief that may be provided by Applicable Laws, whether or not stated in this Lease. No waiver of any default of Tenant hereunder shall be implied from any
acceptance by Landlord of any Rent or other payments due hereunder or any omission by Landlord to take any action on account of such default if such default persists or is repeated, and no express waiver shall affect defaults other than as specified
in said waiver. 
 31.10 Landlord’s termination of (a) this Lease or (b) Tenant’s right to possession of the Premises
shall not relieve Tenant of any liability to Landlord that has previously accrued or that shall arise based upon events that occurred prior to the later to occur of (i) the date of Lease termination or (ii) the date Tenant surrenders
possession of the Premises. 
 31.11 To the extent permitted by Applicable Laws, Tenant waives any and all rights of redemption granted by
or under any present or future Applicable Laws if Tenant is evicted or dispossessed for any cause, or if Landlord obtains possession of the Premises due to Tenant’s default hereunder or otherwise. 

  
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 31.12 Landlord shall not be in default or liable for damages under this Lease unless Landlord
fails to perform obligations required of Landlord within a reasonable time, but in no event shall such failure continue for more than thirty (30) days after written notice from Tenant specifying the nature of Landlord’s failure;
provided, however, that if the nature of Landlord’s obligation is such that more than thirty (30) days are required for its performance, then Landlord shall not be in default if Landlord commences performance within such
thirty (30) day period and thereafter diligently prosecutes the same to completion. In no event shall Tenant have the right to terminate or cancel this Lease or to withhold or abate rent or to set off any Claims against Rent as a result of any
default or breach by Landlord of any of its covenants, obligations, representations, warranties or promises hereunder, except as may otherwise be expressly set forth in this Lease. Nothing in this Lease shall be construed to limit Tenant’s
remedies in the event Tenant brings a lawsuit for any default by Landlord, in which case Tenant may pursue any remedies available at law or in equity (provided that Tenant’s recourse will be limited by Article 35 and the
other terms and provisions of this Lease). 
 31.13 In the event of any default by Landlord, Tenant shall give notice by registered or
certified mail to any (a) beneficiary of a deed of trust or (b) mortgagee under a mortgage covering the Premises, the Building or the Project and to any landlord of any lease of land upon or within which the Premises, the Building or the
Project is located, and shall offer such beneficiary, mortgagee or landlord a reasonable opportunity to cure the default, including time to obtain possession of the Building or the Project by power of sale or a judicial action if such should prove
necessary to effect a cure; provided that Landlord shall furnish to Tenant in writing, upon written request by Tenant, the names and addresses of all such persons who are to receive such notices. 

32. Bankruptcy. In the event a debtor, trustee or debtor in possession under the Bankruptcy Code, or another person with similar rights, duties and
powers under any other Applicable Laws, proposes to cure any default under this Lease or to assume or assign this Lease and is obliged to provide adequate assurance to Landlord that (a) a default shall be cured, (b) Landlord shall be
compensated for its damages arising from any breach of this Lease and (c) future performance of Tenant’s obligations under this Lease shall occur, then such adequate assurances shall include any or all of the following, as designated by
Landlord in its sole and absolute discretion: 
 32.1 Those acts specified in the Bankruptcy Code or other Applicable Laws as included
within the meaning of “adequate assurance,” even if this Lease does not concern a shopping center or other facility described in such Applicable Laws; 

32.2 A prompt cash payment to compensate Landlord for any monetary defaults or actual damages arising directly from a breach of this Lease;

 32.3 A cash deposit in an amount at least equal to the then-current amount of the Security Deposit; or 

32.4 The assumption or assignment of all of Tenant’s interest and obligations under this Lease. 

  
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 33. Brokers. 

33.1 Tenant represents and warrants that it has had no dealings with any real estate broker or agent in connection with the negotiation of
this Lease other than Hughes Marino (“Broker”), and that it knows of no other real estate broker or agent that is or might be entitled to a commission in connection with this Lease. Landlord shall compensate Broker in relation to
this Lease pursuant to a separate agreement between Landlord and Broker. 
 33.2 Tenant represents and warrants that no broker or agent has
made any representation or warranty relied upon by Tenant in Tenant’s decision to enter into this Lease, other than as contained in this Lease. 

33.3 Tenant acknowledges and agrees that the employment of brokers by Landlord is for the purpose of solicitation of offers of leases from
prospective tenants and that no authority is granted to any broker to furnish any representation (written or oral) or warranty from Landlord unless expressly contained within this Lease. Landlord is executing this Lease in reliance upon
Tenant’s representations, warranties and agreements contained within Sections 33.1 and 33.2. 
 33.4 Tenant agrees to
indemnify, save, defend (at Landlord’s option and with counsel reasonably acceptable to Landlord) and hold the Landlord Indemnitees harmless from any and all cost or liability for compensation claimed by any broker or agent, other than Broker,
employed or engaged by Tenant or claiming to have been employed or engaged by Tenant. 
 34. Definition of Landlord. With regard to obligations
imposed upon Landlord pursuant to this Lease, the term “Landlord,” as used in this Lease, shall refer only to Landlord or Landlord’s then-current successor-in-interest. In the event of any transfer, assignment or conveyance of
Landlord’s interest in this Lease or in Landlord’s fee title to or leasehold interest in the Property, as applicable, Landlord herein named (and in case of any subsequent transfers or conveyances, the subsequent Landlord) shall be
automatically freed and relieved, from and after the date of such transfer, assignment or conveyance, from all liability for the performance of any covenants or obligations contained in this Lease thereafter to be performed by Landlord and, without
further agreement, the transferee, assignee or conveyee of Landlord’s in this Lease or in Landlord’s fee title to or leasehold interest in the Property, as applicable, shall be deemed to have assumed and agreed to observe and perform any
and all covenants and obligations of Landlord hereunder during the tenure of its interest in the Lease or the Property. Landlord or any subsequent Landlord may transfer its interest in the Premises or this Lease without Tenant’s consent. 

35. Limitation of Landlord’s Liability. 

35.1 If Landlord is in default under this Lease and, as a consequence, Tenant recovers a monetary judgment against Landlord, the judgment
shall be satisfied only out of (a) the proceeds of sale received on execution of the judgment and levy against the right, title and interest of Landlord in the Building and the Project, (b) rent or other income from such real property
receivable by Landlord or (c) the consideration received by Landlord from the sale, financing, refinancing or other disposition of all or any part of Landlord’s right, title or interest in the Building or the Project. 

  
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 35.2 Except as otherwise provided in Section 35.1, Landlord shall not be personally
liable for any deficiency under this Lease. If Landlord is a partnership or joint venture, then the partners of such partnership shall not be personally liable for Landlord’s obligations under this Lease, and no partner of Landlord shall be
sued or named as a party in any suit or action, and service of process shall not be made against any partner of Landlord except as may be necessary to secure jurisdiction of the partnership or joint venture. If Landlord is a corporation, then the
shareholders, directors, officers, employees and agents of such corporation shall not be personally liable for Landlord’s obligations under this Lease, and no shareholder, director, officer, employee or agent of Landlord shall be sued or named
as a party in any suit or action, and service of process shall not be made against any shareholder, director, officer, employee or agent of Landlord. If Landlord is a limited liability company, then the members of such limited liability company
shall not be personally liable for Landlord’s obligations under this Lease, and no member of Landlord shall be sued or named as a party in any suit or action, and service of process shall not be made against any member of Landlord except as may
be necessary to secure jurisdiction of the limited liability company. No partner, shareholder, director, employee, member or agent of Landlord shall be required to answer or otherwise plead to any service of process, and no judgment shall be taken
or writ of execution levied against any partner, shareholder, director, employee, member or agent of Landlord. 
 35.3 Each of the covenants
and agreements of this Article shall be applicable to any covenant or agreement either expressly contained in this Lease or imposed by Applicable Laws and shall survive the expiration or earlier termination of this Lease. 

36. Joint and Several Obligations. If more than one person or entity executes this Lease as Tenant, then: 

36.1 Each of them is jointly and severally liable for the keeping, observing and performing of all of the terms, covenants, conditions,
provisions and agreements of this Lease to be kept, observed or performed by Tenant; and 
 36.2 The term “Tenant,” as used
in this Lease shall mean and include each of them, jointly and severally. The act of, notice from, notice to, refund to, or signature of any one or more of them with respect to the tenancy under this Lease, including any renewal, extension,
expiration, termination or modification of this Lease, shall be binding upon each and all of the persons executing this Lease as Tenant with the same force and effect as if each and all of them had so acted, so given or received such notice or
refund, or so signed. 
 37. Representations. Tenant guarantees, warrants and represents that (a) Tenant is duly incorporated or otherwise
established or formed and validly existing under the laws of its state of incorporation, establishment or formation, (b) Tenant has and is duly qualified to do business in the state in which the Property is located, (c) Tenant has full
corporate, partnership, trust, association or other appropriate power and authority to enter into this Lease and to perform all Tenant’s obligations hereunder, (d) each person (and all of the persons if more than one signs) signing this
Lease on behalf of Tenant is duly and validly authorized to do so and (e) neither (i) the execution, delivery or performance of this Lease nor (ii) the consummation of the transactions contemplated hereby will violate or conflict with
any provision of documents or instruments under which Tenant is constituted or to which Tenant is a party. In addition, Tenant 

  
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guarantees, warrants and represents that none of (x) it, (y) its affiliates or partners nor (z) to the best of its knowledge, its members, shareholders or other equity owners
or any of their respective employees, officers, directors, representatives or agents is a person or entity with whom U.S. persons or entities are restricted from doing business under regulations of the Office of Foreign Asset Control
(“OFAC”) of the Department of the Treasury (including those named on OFAC’s Specially Designated and Blocked Persons List) or under any statute, executive order (including the September 24, 2001, Executive Order Blocking
Property and Prohibiting Transactions with Persons Who Commit, Threaten to Commit, or Support Terrorism) or other similar governmental action. 
 38.
Confidentiality. Each party shall keep the terms and conditions of this Lease and any information provided to such party or its employees, agents or contractors pursuant to Article 9 confidential and shall not (a) disclose to any third
party any terms or conditions of this Lease or any other Lease-related document (including subleases, assignments, work letters, construction contracts, letters of credit, subordination agreements, non-disturbance agreements, brokerage agreements or
estoppels) or (b) provide to any third party an original or copy of this Lease (or any Lease-related document). Landlord shall keep confidential the economic and commercial terms and conditions of this Lease and all proprietary, business and
technical information of Tenant obtained by Landlord; provided, however, that Landlord may disclose such information in the form of aggregate leasing data provided to investors in the normal course of business. Notwithstanding the
foregoing, confidential information under this Section may be released by Landlord or Tenant under the following circumstances: (x) if required by Applicable Laws or in any judicial proceeding; provided that the releasing party has given
the other party reasonable notice of such requirement, if feasible, (y) to a party’s attorneys, accountants, brokers and other bona fide consultants or advisers (with respect to this Lease only); provided such third parties agree to
be bound by this Section or (z) to bona fide prospective assignees or subtenants of this Lease; provided they agree in writing to be bound by this Section. 

39. Notices. Any notice, consent, demand, bill, statement or other communication required or permitted to be given hereunder shall be in writing and
shall be given by personal delivery, overnight delivery with a reputable nationwide overnight delivery service, or certified mail (return receipt requested), and if given by personal delivery, shall be deemed delivered upon receipt; if given by
overnight delivery, shall be deemed delivered one (1) business day after deposit with a reputable nationwide overnight delivery service; and, if given by certified mail (return receipt requested), shall be deemed delivered three
(3) business days after the time the notifying party deposits the notice with the United States Postal Service. Any notices given pursuant to this Lease shall be addressed to Tenant at the Premises, or to Landlord or Tenant at the addresses
shown in Sections 2.9 and 2.10, respectively. Either party may, by notice to the other given pursuant to this Section, specify additional or different addresses for notice purposes. 

40. Intentionally Omitted. 
 41. Miscellaneous.

 41.1 Landlord reserves the right to change the name of the Building or the Project in its sole discretion. 

  
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 41.2 To induce Landlord to enter into this Lease, Tenant agrees that it shall promptly furnish to
Landlord, from time to time, upon Landlord’s written request, the most recent year-end financial statements reflecting Tenant’s current financial condition audited by a nationally recognized accounting firm. Tenant shall, within ninety
(90) days after the end of Tenant’s financial year, furnish Landlord with a certified copy of Tenant’s year-end financial statements for the previous year audited by a nationally recognized accounting firm. Tenant represents and
warrants that all financial statements, records and information furnished by Tenant to Landlord in connection with this Lease are true, correct and complete in all respects. If audited financials are not otherwise prepared, unaudited financials
complying with generally accepted accounting principles and certified by the chief financial officer of Tenant as true, correct and complete in all respects shall suffice for purposes of this Section. 

41.3 Where applicable in this Lease, the singular includes the plural and the masculine or neuter includes the masculine, feminine and neuter.
The words “include,” “includes,” “included” and “including” shall mean “‘include,’ etc., without limitation.” The section headings of this Lease are not a part of this Lease and shall have
no effect upon the construction or interpretation of any part hereof. 
 41.4 If either party commences an action against the other party
arising out of or in connection with this Lease, then the substantially prevailing party shall be reimbursed by the other party for all reasonable costs and expenses, including reasonable attorneys’ fees and expenses, incurred by the
substantially prevailing party in such action or proceeding and in any appeal in connection therewith. 
 41.5 Submission of this instrument
for examination or signature by Tenant does not constitute a reservation of or option for a lease, and shall not be effective as a lease or otherwise until execution by and delivery to both Landlord and Tenant. 

41.6 Time is of the essence with respect to the performance of every provision of this Lease in which time of performance is a factor. 

41.7 [Intentionally Omitted] 

41.8 Whenever consent or approval of either party is required, that party shall not unreasonably withhold such consent or approval, except as
may be expressly set forth to the contrary. 
 41.9 The terms of this Lease are intended by the parties as a final expression of
then-agreement with respect to the terms as are included herein, and may not be contradicted by evidence of any prior or contemporaneous agreement. 

41.10 Any provision of this Lease that shall prove to be invalid, void or illegal shall in no way affect, impair or invalidate any other
provision hereof, and all other provisions of this Lease shall remain in full force and effect and shall be interpreted as if the invalid, void or illegal provision did not exist. 

  
 52 

 41.11 Landlord may, but shall not be obligated to, record a short form or memorandum hereof
without Tenant’s consent. Within ten (10) days after receipt of written request from Landlord, Tenant shall execute a termination of any short form or memorandum of lease recorded with respect hereto. Neither party shall record this Lease.
The party requesting the recording of any short form or memorandum of this Lease shall be responsible for such cost, including any transfer or other taxes incurred in connection with said recordation. 

41.12 The language in all parts of this Lease shall be in all cases construed as a whole according to its fair meaning and not strictly for or
against either Landlord or Tenant. 
 41.13 Each of the covenants, conditions and agreements herein contained shall inure to the benefit of
and shall apply to and be binding upon the parties hereto and their respective heirs; legatees; devisees; executors; administrators; and permitted successors, assigns and sublessees. Nothing in this Section shall in any way alter the provisions of
this Lease restricting assignment or subletting. 
 41.14 Except for BioMed Realty, L.P., who is an intended third-party beneficiary of this
Lease, this Lease is solely for the benefit of the parties hereto and their respective successors and permitted assigns and this Lease shall not otherwise be deemed to confer upon or give to any other third party any right, claim, cause of action or
other interest herein. 
 41.15 This Lease shall be governed by, construed and enforced in accordance with the laws of the state in which
the Premises are located, without regard to such state’s conflict of law principles. 
 41.16 Tenant guarantees, warrants and
represents that the individual or individuals signing this Lease have the power, authority and legal capacity to sign this Lease on behalf of and to bind all entities, corporations, partnerships, limited liability companies, joint venturers or other
organizations and entities on whose behalf said individual or individuals have signed. 
 41.17 This Lease may be executed in one or more
counterparts, each of which, when taken together, shall constitute one and the same document. 
 41.18 No provision of this Lease may be
modified, amended or supplemented except by an agreement in writing signed by Landlord and Tenant. The waiver by Landlord or Tenant of any breach by the other party of any term, covenant or condition herein contained shall not be deemed to be a
waiver of any subsequent breach of the same or any other term, covenant or condition herein contained. 
 41.19 To the extent permitted by
Applicable Laws, the parties waive trial by jury in any action, proceeding or counterclaim brought by the other party hereto related to matters arising out of or in any way connected with this Lease; the relationship between Landlord and Tenant;
Tenant’s use or occupancy of the Premises; or any claim of injury or damage related to this Lease or the Premises. 
 42. Option to Extend Term.
Tenant shall have the option (“Option”) to extend the Term by five (5) years as to the entire Premises (and no less than the entire Premises) upon the following 

  
 53 

 
terms and conditions. Any extension of the Term pursuant to the Option shall be on all the same terms and conditions as this Lease, except as follows: 

42.1 Base Rent and increases of Base Rent during the Option term shall equal the fair market value (“FMV”). If Landlord and
Tenant cannot agree on the FMV within thirty (30) days after Landlord’s receipt of an Option Notice (as defined below), they shall mutually agree on a third party real estate broker with at least ten (10) years’ experience in the
leasing of life science properties in the San Diego, California, area, who shall determine the FMV, which determination shall be binding on Landlord and Tenant. Landlord and Tenant shall each pay one-half (1/2) of the cost of the broker. FMV
shall be defined as the amount of rent that a well-informed tenant, willing (but not obliged) to lease the Premises, would pay, and that a well-informed landlord, willing (but not obliged) to lease to a tenant, would accept, taking into
consideration (y) all uses to which the Premises are adapted and might in reason be applied and (z) the then-market terms being offered in the Torrey Pines submarket for premises reasonably comparable to the Premises. 

42.2 The Option is not assignable separate and apart from this Lease. 

42.3 The Option is conditional upon Tenant giving Landlord written notice of its election to exercise the Option at least nine (9) months
prior to the end of the expiration of the then-current Term. Time shall be of the essence as to Tenant’s exercise of the Option. Tenant assumes full responsibility for maintaining a record of the deadlines to exercise the Option. Tenant
acknowledges that it would be inequitable to require Landlord to accept any exercise of the Option after the date provided for in this Section. 

42.4 Notwithstanding anything contained in this Article to the contrary, Tenant shall not have the right to exercise the Option: 

(a) During the time commencing from the date Landlord delivers to Tenant a written notice that Tenant is in default under any provisions of
this Lease and continuing until Tenant has cured the specified default to Landlord’s reasonable satisfaction; or 
 (b) At any time
after any Default as described in Article 31 of the Lease (provided, however, that, for purposes of this Subsection 42.4(b), Landlord shall not be required to provide Tenant with notice of such Default) and continuing
until Tenant cures any such Default, if such Default is susceptible to being cured; or 
 (c) In the event that Tenant has defaulted in the
performance of its obligations under this Lease two (2) or more times and a service or late charge has become payable under Section 31.1 for each of such defaults during the twelve (12)-month period immediately prior to the date
that Tenant intends to exercise the Option, whether or not Tenant has cured such defaults. 
 42.5 The period of time within which Tenant
may exercise the Option shall not be extended or enlarged by reason of Tenant’s inability to exercise such Option because of the provisions of Section 42.4. 

  
 54 

 42.6 All of Tenant’s rights under the provisions of the Option shall terminate and be of no
further force or effect even after Tenant’s due and timely exercise of the Option if, after such exercise, but prior to the commencement date of the new term, (a) Tenant fails to pay to Landlord a monetary obligation of Tenant for a period
of twenty (20) days after written notice from Landlord to Tenant, (b) Tenant fails to commence to cure a default (other than a monetary default) within thirty (30) days after the date Landlord gives notice to Tenant of such default or
(c) Tenant has defaulted under this Lease two (2) or more times and a service or late charge under Section 31.1 has become payable for any such default, whether or not Tenant has cured such defaults. 

43. Investment Rights of BioMed Realty, L.P.. In accordance and subject to the terms and conditions set forth in that certain side letter by and
between BioMed Realty, L.P. and Tenant dated December 22, 2011 (the “Side Letter”), BioMed Realty, L.P. shall have certain participation rights in a future equity financing of Tenant and may have certain Board observer rights,
which Board observer rights are subject to the approval of Tenant’s Board of Directors. 
 [REMAINDER OF THIS PAGE INTENTIONALLY LEFT
BLANK] 

  
 55 

 IN WITNESS WHEREOF, the parties hereto have executed this Lease as of the date first above
written. 
  

			
	LANDLORD:
	
	 BMR-JOHN HOPKINS COURT LLC,
 a
Delaware limited liability company

		
	By:	 	 /s/ Kevin M. Simonsen

	Name:	 	Kevin M. Simonsen
	Title:	 	VP, Real Estate Counsel
	
	TENANT:
	
	 ATYR PHARMA, INC.,
 a Delaware
corporation

		
	By:	 	 /s/ Andrew Cubitt

	Name:	 	Andrew Cubitt
	Title:	 	VP, Intellectual Property

 EXHIBIT A 

PREMISES 

  
 A-1 

 EXHIBIT B 

WORK LETTER 
 This Work
Letter (this “Work Letter”) is made and entered into as of the 22nd day of December, 2011, by and between BMR-John Hopkins Court LLC, a Delaware limited liability company
(“Landlord”), and aTyr Pharma, Inc., a Delaware corporation (“Tenant”), and is attached to and made a part of that certain Lease dated as of December 22, 2011 (as the same may be amended, amended and
restated, supplemented or otherwise modified from time to time, the “Lease”), by and between Landlord and Tenant for the Premises located at 3545 John Hopkins Court, San Diego, California 92121. All capitalized terms used
but not otherwise defined herein shall have the meanings given them in the Lease. 
 1. General Requirements. 

1.1. Authorized Representatives. 

(a) Landlord designates, as Landlord’s authorized representative (“Landlord’s Authorized Representative”),
(a) Federico Mina as the person authorized to initial plans, drawings and approvals pursuant to this Work Letter and (b) John Bonanno as the person authorized to initial plans, drawings, approvals and to sign change orders pursuant to this
Work Letter and any amendments to this Work Letter or the Lease. Tenant shall not be obligated to respond to or act upon any such item until such item has been initialed or signed (as applicable) by the appropriate Landlord’s Authorized
Representative. Landlord may change either Landlord’s Authorized Representative upon one (1) business day’s prior written notice to Tenant. 

(b) Tenant designates both Debbie Walker and Dean Petersen (each, a “Tenant’s Authorized Representative”) acting
individually as the individuals authorized to initial and sign all plans, drawings, change orders and approvals pursuant to this Work Letter. Landlord shall not be obligated to respond to or act upon any such item until such item has been initialed
or signed (as applicable) by Tenant’s Authorized Representative. Tenant may change Tenant’s Authorized Representative upon one (1) business day’s prior written notice to Landlord. 

1.2. Schedule. The schedule for design and development of the Tenant Improvements, including the time periods for preparation and
review of construction documents, approvals and performance, shall be in accordance with the schedule attached hereto as Exhibit 1 (the “Schedule”). The Schedule shall be subject to adjustment as mutually agreed upon in
writing by the parties, or as otherwise provided in this Work Letter. 
 1.3. Landlord’s Architects, Contractors and
Consultants. The architect, engineering consultants, design team, general contractor and subcontractors responsible for the construction of the Tenant Improvements shall be Ferguson Pape Baldwin Architects, Prevost Construction, Apex Mechanical
and Ickler Electric, and Landlord shall use commercially reasonable efforts to obtain market competitive rates from such parties in connection with the design, development and construction of the Tenant Improvements. 

  
 B-1 

 2. Tenant Improvements. All Tenant Improvements shall be performed by Landlord’s contractor
(“Contractor”), at Tenant’s sole cost and expense (subject to Landlord’s obligations with respect to any portion of the Base TI Allowance and, if properly requested by Tenant pursuant to the terms of the Lease, the
Additional TI Allowance used by Landlord in completing the Tenant Improvements) and in substantial accordance with the Approved Plans (as defined below), the Lease and this Work Letter. To the extent that the total projected cost of the Tenant
Improvements (as projected by Landlord) exceeds the TI Allowance (such excess, the “Excess TI Costs”) and Tenant agrees with Landlord’s projection and has been given opportunity to value engineer the project to a total that is
at or below the TI Allowance, if desired, (provided that Tenant’s opportunity to value engineer the project shall end on January 6, 2012), Tenant shall pay the costs of the Tenant Improvements on a pari passu basis with Landlord as such
costs become due, in the proportion of Excess TI Costs payable by Tenant to the Base TI Allowance (and, if properly requested by Tenant pursuant to the Lease, the Additional TI Allowance) payable by Landlord. If Tenant fails to pay, or is late in
paying, any sum due to Landlord under this Work Letter, then Landlord shall have all of the rights and remedies set forth in the Lease for nonpayment of Rent (including the right to interest and the right to assess a late charge), and for purposes
of any litigation instituted with regard to such amounts the same shall be considered Rent. All material and equipment furnished by Landlord or its contractors as the Tenant Improvements shall be new or “like new,” and the Tenant
Improvements shall be performed in a first-class, workmanlike manner. Landlord and Tenant shall use commercially reasonable efforts to cooperate with each other to enforce any and all warranties from the Contractor with respect to the Tenant
Improvements. Landlord warrants that, as of Substantial Completion of the Tenant Improvements, the Tenant Improvements shall be in compliance with all Applicable Laws, and Landlord shall, at its sole cost and expense and as Tenant’s sole
remedy, correct any breach of such warranty promptly following receipt of written notice thereof from Tenant. 
 2.1. Work Plans.
Landlord shall prepare and submit to Tenant for approval schematics covering the Tenant Improvements prepared in conformity with the applicable provisions of this Work Letter (the “Draft Schematic Plans”). The Draft Schematic Plans
shall contain sufficient information and detail to accurately describe the proposed design to Tenant. Tenant shall notify Landlord in writing within five (5) days after receipt of the Draft Schematic Plans whether Tenant approves or objects to
the Draft Schematic Plans and of the manner, if any, in which the Draft Schematic Plans are unacceptable. Tenant’s failure to respond within such five (5) day period shall be deemed approval by Tenant. If Tenant reasonably objects to the
Draft Schematic Plans, then Landlord shall revise the Draft Schematic Plans and cause Tenant’s objections to be remedied in the revised Draft Schematic Plans. Landlord shall then resubmit the revised Draft Schematic Plans to Tenant for
approval, such approval not to be unreasonably withheld, conditioned or delayed. Tenant’s approval of or objection to revised Draft Schematic Plans and Landlord’s correction of the same shall be in accordance with this Section until Tenant
has approved the Draft Schematic Plans in writing or been deemed to have approved them. The iteration of the Draft Schematic Plans that is approved or deemed approved by Tenant without objection shall be referred to herein as the “Approved
Schematic Plans.” In the event that Draft Schematic Plans are not approved by Tenant in accordance with this Section on or before the Execution Date, then, notwithstanding anything in the Lease or this Work Letter to the contrary, Landlord
shall be entitled to a day-for-day delay for every day after such date until Draft Schematic Plans are approved by Tenant in accordance with this Section. 

  
 B-2 

 2.2. Construction Plans. Landlord shall prepare final plans and specifications for the
Tenant Improvements that (a) are consistent with and are logical evolutions of the Approved Schematic Plans and (b) incorporate any other Tenant-requested (and Landlord-approved) Changes (as defined below). As soon as such final plans and
specifications (“Construction Plans”) are completed, Landlord shall deliver the same to Tenant for Tenant’s approval, which approval shall not be unreasonably withheld, conditioned or delayed. Such Construction Plans shall be
approved or disapproved by Tenant within five (5) days after delivery to Tenant. Tenant’s failure to respond within such five (5) day period shall be deemed approval by Tenant. If the Construction Plans are disapproved by Tenant, then
Tenant shall notify Landlord in writing of its reasonable objections to such Construction Plans, and the parties shall confer and negotiate in good faith to reach agreement on the Construction Plans. Promptly after the Construction Plans are
approved by Landlord and Tenant, two (2) copies of such Construction Plans shall be initialed and dated by Landlord and Tenant, and Landlord shall promptly submit such Construction Plans to all appropriate Governmental Authorities for approval.
The Construction Plans so approved, and all change orders specifically permitted by this Work Letter, are referred to herein as the “Approved Plans.” 

2.3. Changes to the Tenant Improvements. Any changes to the Approved Plans (each, a “Change”) shall be requested and
instituted in accordance with the provisions of this Article 2 and shall be subject to the written approval of the non-requesting party in accordance with this Work Letter. 

(a) Change Request. Either Landlord or Tenant may request Changes after Tenant approves the Approved Plans by notifying the other party
thereof in writing in substantially the same form as the AIA standard change order form (a “Change Request”), which Change Request shall detail the nature and extent of any requested Changes, including (a) the Change,
(b) the party required to perform the Change and (c) any modification of the Approved Plans and the Schedule, as applicable, necessitated by the Change, If the nature of a Change requires revisions to the Approved Plans, then the
requesting party shall be solely responsible for the cost and expense of such revisions and any increases in the cost of the Tenant Improvements as a result of such Change; provided that if any funds remain available from the Base TI
Allowance following Substantial Completion of the Tenant Improvements, then such funds shall be used to pay for the cost of such Change. Change Requests shall be signed by the requesting party’s Authorized Representative. 

(b) Approval of Changes. All Change Requests shall be subject to the other party’s prior written approval, which approval shall
not be unreasonably withheld, conditioned or delayed. The non-requesting party shall have five (5) business days after receipt of a Change Request to notify the requesting party in writing of the non-requesting party’s decision either to
approve or object to the Change Request. The non-requesting party’s failure to respond within such five (5) business day period shall be deemed approval by the non-requesting party. 

3. Requests for Consent. Except as otherwise provided in this Work Letter, Tenant shall respond to all requests for consents, approvals or directions
made by Landlord pursuant to this Work Letter within five (5) days following Tenant’s receipt of such request. Tenant’s failure to respond within such five (5) day period shall be deemed approval by Tenant. 

  
 B-3 

 4. TI Allowance. 

4.1. Application of TI Allowance. Landlord shall contribute, in the following order, the Base TI Allowance; if properly requested by
Tenant pursuant to the terms of the Lease, the Additional TI Allowance; and any Excess TI Costs advanced by Tenant to Landlord toward the costs and expenses incurred in connection with the performance of the Tenant Improvements, in accordance with
Article 4 of the Lease. If the entire TI Allowance is not applied toward or reserved for the costs of the Tenant Improvements, then Tenant shall not be entitled to a credit of such unused portion of the TI Allowance. If the entire Excess TI
Costs advanced by Tenant to Landlord are not applied toward the costs of the Tenant Improvements, then Landlord shall promptly return such excess to Tenant following completion of the Tenant Improvements. Tenant may apply the Base TI Allowance and,
if properly requested by Tenant pursuant to the terms of the Lease, the Additional TI Allowance for the payment of construction and other costs in accordance with the terms and provisions of the Lease. 

4.2. Approval of Budget for the Tenant Improvements. Notwithstanding anything to the contrary set forth elsewhere in this Work Letter
or the Lease, Landlord shall not have any obligation to expend any portion of the TI Allowance until Landlord and Tenant shall have approved in writing the budget for the Tenant Improvements (the “Approved Budget”), which Landlord
shall provide as soon as commercially reasonable following full execution of the Lease. Prior to Landlord’s approval of the Approved Budget, Tenant shall pay all of the costs and expenses incurred in connection with the Tenant Improvements as
they become due and Landlord shall promptly reimburse Tenant for any such costs and expenses reflected in and upon the mutual approval of the Approved Budget. Tenant shall promptly reimburse Landlord for costs or expenses relating to the Tenant
Improvements that exceed the amount of the TI Allowance. 
 5. Miscellaneous. 

5.1. Number; Headings. Where applicable in this Work Letter, the singular includes the plural and the masculine or neuter includes the
masculine, feminine and neuter. The section headings of this Work Letter are not a part of this Work Letter and shall have no effect upon the construction or interpretation of any part hereof. 

5.2. Attorneys’ Fees. If either party commences an action against the other party arising out of or in connection with this Work
Letter, then the substantially prevailing party shall be entitled to have and recover from the other party reasonable attorneys’ fees, charges and disbursements and costs of suit. 

5.3. Time of Essence. Time is of the essence with respect to the performance of every provision of this Work Letter in which time of
performance is a factor. 
 5.4. Covenant and Condition. Each provision of this Work Letter performable by Tenant shall be deemed
both a covenant and a condition. 

  
 B-4 

 5.5. Withholding of Consent. Whenever consent or approval of either party is required,
that party shall not unreasonably withhold, condition or delay such consent or approval, except as may be expressly set forth to the contrary. 

5.6. Invalidity. Any provision of this Work Letter that shall prove to be invalid, void or illegal shall in no way affect, impair or
invalidate any other provision hereof, and all other provisions of this Work Letter shall remain in full force and effect and shall be interpreted as if the invalid, void or illegal provision did not exist. 

5.7. Interpretation. The language in all parts of this Work Letter shall be in all cases construed as a whole according to its fair
meaning and not strictly for or against either Landlord or Tenant. 
 5.8. Successors. Each of the covenants, conditions and
agreements herein contained shall inure to the benefit of and shall apply to and be binding upon the parties hereto and their respective heirs; legatees; devisees; executors; administrators; and permitted successors, assigns, sublessees. Nothing in
this Section shall in any way alter the provisions of the Lease restricting assignment or subletting. 
 5.9. Governing Law. This
Work Letter shall be governed by, construed and enforced in accordance with the laws of the state in which the Premises are located, without regard to such state’s conflict of law principles. 

5.10. Power and Authority. Tenant guarantees, warrants and represents that the individual or individuals signing this Work Letter have
the power, authority and legal capacity to sign this Work Letter on behalf of and to bind all entities, corporations, partnerships, limited liability companies, joint venturers or other organizations and entities on whose behalf said individual or
individuals have signed. 
 5.11. Counterparts. This Work Letter may be executed in one or more counterparts, each of which, when
taken together, shall constitute one and the same document. 
 5.12. Amendments; Waiver. No provision of this Work Letter may be
modified, amended or supplemented except by an agreement in writing signed by Landlord and Tenant. The waiver by Landlord of any breach by Tenant of any term, covenant or condition herein contained shall not be deemed to be a waiver of any
subsequent breach of the same or any other term, covenant or condition herein contained. 
 5.13. Waiver of Jury Trial. To the extent
permitted by Applicable Laws, the parties waive trial by jury in any action, proceeding or counterclaim brought by the other party hereto related to matters arising out of or in any way connected with this Work Letter; the relationship between
Landlord and Tenant; Tenant’s use or occupancy of the Premises; or any claim of injury or damage related to this Work Letter or the Premises. 

[REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] 

  
 B-5 

 IN WITNESS WHEREOF, Landlord and Tenant have executed this Work Letter to be effective on the
date first above written. 
  

			
	LANDLORD:
	
	 BMR-JOHN HOPKINS COURT LLC,
 a
Delaware limited liability company

		
	By:	 	 /s/ Kevin M. Simonsen

	Name:	 	Kevin M. Simonsen
	Title:	 	VP, Real Estate Counsel
	
	TENANT:
	
	 ATYR PHARMA, INC.,
 a Delaware
corporation

		
	By:	 	 /s/ Andrew Cubitt

	Name:	 	Andrew Cubitt
	Title:	 	VP, Intellectual Property

  
 B-6 

 Exhibit 1 to Exhibit B 

SCHEDULE 

  
 B-7 

 EXHIBIT C 

ACKNOWLEDGEMENT OF TERM COMMENCEMENT DATE 

AND TERM EXPIRATION DATE 

THIS ACKNOWLEDGEMENT OF [PHASE 1] [PHASE 2] TERM COMMENCEMENT DATE AND TERM EXPIRATION DATE is entered into as of
[    ], 2012, with reference to that certain Lease (the “Lease”) dated as of December [    ], 2011, by aTyr Pharma, Inc., a Delaware corporation (“Tenant”), in favor of
BMR-John Hopkins Court LLC, a Delaware limited liability company (“Landlord”). All capitalized terms used herein without definition shall have the meanings ascribed to them in the Lease. 

Tenant hereby confirms the following: 

1. Tenant accepted possession of [Phase 1/Phase 2] on
[                    ], 2012. 
 2. To
Tenant’s knowledge, [Phase 1/Phase 2] is in good order, condition and repair. 
 3. The [Phase 1/Phase 2] Tenant
Improvements are Substantially Complete. 
 4. All conditions of the Lease to be performed by Landlord as a condition to the full
effectiveness of the Lease have been satisfied, and Landlord has fulfilled all of its duties in the nature of inducements offered to Tenant to lease [Phase 1/Phase 2]. 

5. In accordance with the provisions of Article 4 of the Lease, the [Phase 1/Phase 2] Term Commencement Date is
[                    ], 2012, and, unless the Lease is terminated prior to the Term Expiration Date pursuant to its terms, the Term Expiration Date
shall be [                    ], 2012. 

6. Tenant commenced occupancy of [Phase 1/Phase 2] for the Permitted Use on
[                    ], 2012. 
 7. The
Lease is in full force and effect, and the same represents the entire agreement between Landlord and Tenant concerning the Premises[, except [            ]]. 

8. Tenant has no existing defenses against the enforcement of the Lease by Landlord, and there exist no offsets or credits against Rent owed
or to be owed by Tenant. 
 9. The obligation to pay Rent is presently in effect and all Rent obligations on the part of Tenant under the
Lease with respect to [Phase 1/Phase 2] commenced to accrue on [                    ], 2012, with Base Rent payable on the dates and
amounts set forth in the chart below: 

  
 C-1 

									
	 Dates
	  	Approximate
Square Feet of
Rentable Area	 	Base Rent per Square
Foot of Rentable Area	  	Monthly
Base Rent	 	Annual Base
Rent
	 Months [    ]-[    ]
	  	[    ]	 	$[            ]

[monthly] [OR] [annually]
	  	[    ]	 	[    ]

 10. The undersigned Tenant has not made any prior assignment, transfer, hypothecation or pledge of the Lease
or of the rents thereunder or sublease of the Premises or any portion thereof. 
 [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] 

  
 C-2 

 IN WITNESS WHEREOF, Tenant has executed this Acknowledgment of [Phase 1/Phase 2] Term
Commencement Date and Term Expiration Date as of the date first written above. 
  

			
	 TENANT:

	
	 aTyr Pharma, Inc.,

a Delaware corporation

		
	 By:
	 	  

	 Name:
	 	  

	 Title:
	 	  

  
 C-3 

 EXHIBIT D 

FORM OF ADDITIONAL TI ALLOWANCE ACCEPTANCE LETTER 

[TENANT LETTERHEAD] 
 BMR-John Hopkins Court LLC

 17190 Bernardo Center Drive 
 San Diego, California 92128

 Attn: Vice President, Real Estate Counsel 

[Date] 
  

	 	Re:	Additional TI Allowance 

 To Whom It May Concern: 

This letter concerns that certain Lease dated as of December [    ], 2011 (the “Lease”), between BMR-John
Hopkins Court LLC (“Landlord”) and aTyr Pharma, Inc. (“Tenant”). Capitalized terms not otherwise defined herein shall have the meanings given them in the Lease. 

Tenant hereby notifies Landlord that it wishes to exercise its right to utilize the Additional TI Allowance pursuant to Article 4 of
the Lease. 
 If you have any questions, please do not hesitate to call
[            ] at ([    ]) [    ]-[            ]. 

Sincerely, 

[Name] 

[Title of Authorized Signatory] 
  

			
	cc:	 	Greg Lubushkin
		 	Karen Sztraicher
		 	John Bonanno
		 	Kevin Simonsen

  
 D-1 

 EXHIBIT E 

FORM OF LETTER OF CREDIT 

[On letterhead or L/C letterhead of Issuer.] 

LETTER OF CREDIT 
 Date:
                    , 200     
  

									
	  
	 	(the “Beneficiary”)	 		  	
	  
	 		 		  	
	  
	 		 		  	
	 Attention:
	 	  
	 		 		  	
	L/C. No.:	 	  
	 		 		  	
	 Loan No.:
	 	  
	 		 		  	

 Ladies and Gentlemen: 

We establish in favor of Beneficiary our irrevocable and unconditional Letter of Credit numbered as identified above (the
“L/C”) for an aggregate amount of $            , expiring at     :00 p.m, on
                    or, if such day is not a Banking Day, then the next succeeding Banking Day (such date, as extended from time to time, the
“Expiry Date”). “Banking Day” means a weekday except a weekday when commercial banks in                     are
authorized or required to close. 
 We authorize Beneficiary to draw on us (the “Issuer”) for the account of
                    (the “Account Party”), under the terms and conditions of this L/C. 

Funds under this L/C are available by presenting the following documentation (the “Drawing Documentation”): (a) the
original L/C and (b) a sight draft substantially in the form of Attachment 1, with blanks filled in and bracketed items provided as appropriate. No other evidence of authority, certificate, or documentation is required. 

Drawing Documentation must be presented at Issuer’s office at
                    on or before the Expiry Date by personal presentation, courier or messenger service, or fax. Presentation by fax shall be
effective upon electronic confirmation of transmission as evidenced by a printed report from the sender’s fax machine. After any fax presentation, but not as a condition to its effectiveness, Beneficiary shall with reasonable promptness deliver
the original Drawing Documentation by any other means. Issuer will on request issue a receipt for Drawing Documentation. 
 We agree,
irrevocably, and irrespective of any claim by any other person, to honor drafts drawn under and in conformity with this L/C, within the maximum amount of this L/C, presented 

  
 E-1 

 
to us on or before the Expiry Date, provided we also receive (on or before the Expiry Date) any other Drawing Documentation this L/C requires. 

We shall pay this L/C only from our own funds by check or wire transfer, in compliance with the Drawing Documentation. 

If Beneficiary presents proper Drawing Documentation to us on or before the Expiry Date, then we shall pay under this L/C at or before the
following time (the “Payment Deadline”): (a) if presentment is made at or before noon of any Banking Day, then the close of such Banking Day; and (b) otherwise, the close of the next Banking Day. We waive any right to
delay payment beyond the Payment Deadline. If we determine that Drawing Documentation is not proper, then we shall so advise Beneficiary in writing, specifying all grounds for our determination, within one Banking Day after the Payment Deadline.

 Partial drawings are permitted. This L/C shall, except to the extent reduced thereby, survive any partial drawings. 

We shall have no duty or right to inquire into the validity of or basis for any draw under this L/C or any Drawing Documentation. We waive any
defense based on fraud or any claim of fraud. 
 The Expiry Date shall automatically be extended by one year (but never beyond
            (the “Outside Date”)) unless, on or before the date 90 days before any Expiry Date, we have given Beneficiary notice that the Expiry Date shall not be so
extended (a “Nonrenewal Notice”). We shall promptly upon request confirm any extension of the Expiry Date under the preceding sentence by issuing an amendment to this L/C, but such an amendment is not required for the extension to
be effective. We need not give any notice of the Outside Date. 
 Beneficiary may from time to time without charge transfer this L/C, in
whole but not in part, to any transferee (the “Transferee”). Issuer shall look solely to Account Party for payment of any fee for any transfer of this L/C. Such payment is not a condition to any such transfer. Beneficiary or
Transferee shall consummate such transfer by delivering to Issuer the original of this L/C and a Transfer Notice substantially in the form of Attachment 2, purportedly signed by Beneficiary, and designating Transferee. Issuer shall promptly
reissue or amend this L/C in favor of Transferee as Beneficiary. Upon any transfer, all references to Beneficiary shall automatically refer to Transferee, who may then exercise all rights of Beneficiary. Issuer expressly consents to any transfers
made from time to time in compliance with this paragraph. 
 Any notice to Beneficiary shall be in writing and delivered by hand with
receipt acknowledged or by overnight delivery service such as FedEx (with proof of delivery) at the above address, or such other address as Beneficiary may specify by written notice to Issuer. A copy of any such notice shall also be delivered, as a
condition to the effectiveness of such notice, to:                      (or such replacement as Beneficiary designates from time to time by
written notice). 

  
 E-2 

 No amendment that adversely affects Beneficiary shall be effective without Beneficiary’s
written consent. 
 This L/C is subject to and incorporates by reference: (a) the International Standby Practices 98 (“ISP
98”): and (b) to the extent not inconsistent with ISP 98, Article 5 of the Uniform Commercial Code of the State of New York. 

Very truly yours, 

[Issuer Signature] 

  
 E-3 

 ATTACHMENT 1 TO EXHIBIT E 

FORM OF SIGHT DRAFT 

[BENEFICIARY LETTERHEAD] 

TO: 
 [Name and Address of Issuer] 

SIGHT DRAFT 
 AT SIGHT, pay to the Order
of                     , the sum of             United States Dollars
($            ). Drawn under [Issuer] Letter of Credit No.                      dated
                 ,             . 

[Issuer is hereby directed to pay the proceeds of this Sight Draft solely to the following account:
                    .] 
 [Name and signature block,
with signature or purported signature of Beneficiary] 
 Date:
                     

  
 E-1-1 

 ATTACHMENT 2 TO EXHIBIT E 

FORM OF TRANSFER NOTICE 

[BENEFICIARY LETTERHEAD] 

TO: 
 [Name and Address of Issuer] (the
“Issuer”) 
 TRANSFER NOTICE 

By signing below, the undersigned, Beneficiary (the “Beneficiary”) under Issuer’s Letter of Credit No.
                    dated                  ,
             (the “L/C”), transfers the L/C to the following transferee (the “Transferee”): 

[Transferee Name and Address] 
 The original L/C is enclosed.
Beneficiary directs Issuer to reissue or amend the L/C in favor of Transferee as Beneficiary. Beneficiary represents and warrants that Beneficiary has not transferred, assigned, or encumbered the L/C or any interest in the L/C, which transfer,
assignment, or encumbrance remains in effect. 
 [Name and signature block, with signature or purported signature of Beneficiary] 

Date:                     ] 

  
 E-2-1 

 EXHIBIT F 

RULES AND REGULATIONS 

NOTHING IN THESE RULES AND REGULATIONS (“RULES AND REGULATIONS”) SHALL SUPPLANT ANY PROVISION OF THE LEASE. IN THE EVENT OF A
CONFLICT OR INCONSISTENCY BETWEEN THESE RULES AND REGULATIONS AND THE LEASE, THE LEASE SHALL PREVAIL. 
 1. Neither Tenant nor Tenant’s employees,
agents, contractors or invitees shall encumber or obstruct the common entrances, lobbies, elevators, sidewalks and stairways of the Building(s) or the Project or use them for any purposes other than ingress or egress to and from the Building(s) or
the Project. 
 2. Except as specifically provided in the Lease, no sign, placard, picture, advertisement, name or notice shall be installed or displayed on
any part of the outside of the Premises or the Building(s) without Landlord’s prior written consent. Landlord shall have the right to remove, at Tenant’s sole cost and expense and without notice, any sign installed or displayed in
violation of this rule. 
 3. If Landlord objects in writing to any curtains, blinds, shades, screens, hanging plants or other objects attached to or used
in connection with any window or door of the Premises or placed on any windowsill, and (a) such window, door or windowsill is visible from the exterior of the Premises and (b) such curtain, blind, shade, screen, hanging plant or other
object is not included in plans approved by Landlord, then Tenant shall promptly remove said curtains, blinds, shades, screens, hanging plants or similar objects at its sole cost and expense. 

4. No deliveries shall be made that impede or interfere with other tenants in or the operation of the Project. 

5. Tenant shall not place a load upon any floor of the Premises that exceeds the load per square foot that (a) such floor was designed to carry or
(b) is allowed by Applicable Laws. Fixtures and equipment that cause noises or vibrations that may be transmitted to the structure of the Building(s) to such a degree as to be objectionable to other tenants shall be placed and maintained by
Tenant, at Tenant’s sole cost and expense, on vibration eliminators or other devices sufficient to eliminate such noises and vibrations to levels reasonably acceptable to Landlord and the affected tenants of the Project. 

6. Tenant shall not use any method of heating or air conditioning other than that present at the Project and serving the Premises as of the Execution Date.

 7. Tenant shall not install any radio, television or other antennae; cell or other communications equipment; or other devices on the roof or exterior
walls of the Premises except in accordance with the Lease. Tenant shall not interfere with radio, television or other digital or electronic communications at the Project or elsewhere. 

  
 F-1 

 8. Canvassing, peddling, soliciting and distributing handbills or any other written material within, on or around
the Project (other than within the Premises) are prohibited. Tenant shall cooperate with Landlord to prevent such activities by Tenant or its employees, agents, contractors and invitees. 

9. Tenant shall store all of its trash, garbage and Hazardous Materials within its Premises or in receptacles designated by Landlord outside of the Premises.
Tenant shall not place in any such receptacle any material that cannot be disposed of in the ordinary and customary manner of trash, garbage and Hazardous Materials disposal. Any Hazardous Materials transported through Common Areas shall be held in
secondary containment devices. 
 10. The Premises shall not be used for lodging or for any improper, immoral or objectionable purpose. No cooking
shall be done or permitted in the Premises; provided, however, that Tenant may use (a) equipment approved in accordance with the requirements of insurance policies that Landlord or Tenant is required to purchase and maintain pursuant to
the Lease for brewing coffee, tea, hot chocolate and similar beverages, (b) microwave ovens for employees’ use and (c) equipment shown on Tenant Improvement plans approved by Landlord; provided, further, that any such equipment
and microwave ovens are used in accordance with Applicable Laws. 
 11. Tenant shall not, without Landlord’s prior written consent, use the name
of the Project, if any, in connection with or in promoting or advertising Tenant’s business except as Tenant’s address. 
 12. Tenant shall comply
with all safety, fire protection and evacuation procedures and regulations established by Landlord or any Governmental Authority. 
 13. Tenant assumes any
and all responsibility for protecting the Premises from theft, robbery and pilferage, which responsibility includes keeping doors locked and other means of entry to the Premises closed. 

14. Tenant shall furnish Landlord with copies of keys, pass cards or similar devices for locks to the Premises. 

15. Tenant shall cooperate and participate in all reasonable security programs affecting the Premises. 

16. Tenant shall not permit any animals in the Project, other than for guide animals or for use in laboratory experiments. 

17. Bicycles shall not be taken into the Building(s) except into areas designated by Landlord. 

18. The water and wash closets and other plumbing fixtures shall not be used for any purposes other than those for which they were constructed, and no
sweepings, rubbish, rags or other substances shall be deposited therein. 
 19. Discharge of industrial sewage shall only be permitted if Tenant, at its
sole expense, first obtains all necessary permits and licenses therefor from all applicable Governmental Authorities. 

  
 F-2 

 20. Smoking is prohibited at the Project. 

21. The Project’s hours of operation are currently 24 hours a day seven days a week. 

22. Tenant shall comply with all orders, requirements and conditions now or hereafter imposed by Applicable Laws or Landlord (“Waste
Regulations”) regarding the collection, sorting, separation and recycling of waste products, garbage, refuse and trash generated by Tenant (collectively, “Waste Products”), including (without limitation) the separation of
Waste Products into receptacles reasonably approved by Landlord and the removal of such receptacles in accordance with any collection schedules prescribed by Waste Regulations. 

23. Tenant, at Tenant’s sole cost and expense, shall cause the Premises to be exterminated on a monthly basis to Landlord’s reasonable satisfaction
and shall cause all portions of the Premises used for the storage, preparation, service or consumption of food or beverages to be cleaned daily in a manner reasonably satisfactory to Landlord, and to be treated against infestation by insects,
rodents and other vermin and pests whenever there is evidence of any infestation. Tenant shall not permit any person to enter the Premises or the Project for the purpose of providing such extermination services, unless such persons have been
approved by Landlord. If requested by Landlord, Tenant shall, at Tenant’s sole cost and expense, store any refuse generated in the Premises by the consumption of food or beverages in a cold box or similar facility. 

Landlord may waive any one or more of these Rules and Regulations for the benefit of Tenant or any other tenant, but no such waiver by
Landlord shall be construed as a waiver of such Rules and Regulations in favor of Tenant or any other tenant, nor prevent Landlord from thereafter enforcing any such Rules and Regulations against any or all of the tenants of the Project, including
Tenant. These Rules and Regulations are in addition to, and shall not be construed to in any way modify or amend, in whole or in part, the terms covenants, agreements and conditions of the Lease. Landlord reserves the right to make such other and
reasonable rules and regulations as, in its judgment, may from time to time be needed for safety and security, the care and cleanliness of the Project, or the preservation of good order therein; provided, however, that
Tenant shall not be obligated to adhere to such additional rules or regulations until Landlord has provided Tenant with written notice thereof. Tenant agrees to abide by these Rules and Regulations and any additional rules and regulations issued or
adopted by Landlord. Tenant shall be responsible for the observance of these Rules and Regulations by Tenant’s employees, agents, contractors and invitees. 

  
 F-3 

 EXHIBIT G 

FORM OF ESTOPPEL CERTIFICATE 
  

			
	To:	 	BMR-John Hopkins Court LLC
		 	17190 Bernardo Center Drive
		 	San Diego, California 92128
		 	Attention: Vice President, Real Estate Counsel
		
		 	BioMed Realty, L.P.
		 	17190 Bernardo Center Drive
		 	San Diego, California 92128
		
	Re:	 	3545 John Hopkins Court, San Diego, California 92121 (the “Premises”) at 3545-3575 John Hopkins Court, San Diego, California 92121 (the “Property”)

 The undersigned tenant (“Tenant”) hereby certifies to you as follows: 

1. Tenant is a tenant at the Property under a lease (the “Lease”) for the Premises dated as of December
[    ], 2011. The Lease has not been cancelled, modified, assigned, extended or amended [except as follows: [            ]], and there are no other agreements, written
or oral, affecting or relating to Tenant’s lease of the Premises or any other space at the Property. The lease term expires on
[                    ], 20[    ]. 

2. Tenant took possession of the Premises, currently consisting of [            ]
square feet, on [                    ], 20[    ], and commenced to pay rent on
[                    ], 20[    ]. Tenant has full possession of the Premises, has not assigned the Lease or sublet any part of
the Premises, and does not hold the Premises under an assignment or sublease[, except as follows: [            ]]. 

3. All base rent, rent escalations and additional rent under the Lease have been paid through
[                    ], 20[    ]. There is no prepaid rent[, except
$[            ]][, and the amount of security deposit is $[            ] [in cash][OR][in the form of a letter of credit]].
Tenant currently has no right to any future rent abatement under the Lease. 
 4. Base rent is currently payable in the amount of
$[            ] per month. 
 5. Tenant is currently paying estimated payments
of additional rent of $[            ] per month on account of real estate taxes, insurance, management fees and common area maintenance expenses. 

6. All work to be performed for Tenant under the Lease has been performed as required under the Lease and has been accepted by Tenant[, except
[            ]], and all allowances to be paid to Tenant, including allowances for tenant improvements, moving expenses or other items, have been paid. 

7. The Lease is in full force and effect, free from default and free from any event that could become a default under the Lease, and Tenant
has no claims against the landlord or 

  
 G-1 

 
offsets or defenses against rent, and there are no disputes with the landlord. Tenant has received no notice of prior sale, transfer, assignment, hypothecation or pledge of the Lease or of the
rents payable thereunder[, except [            ]]. 
 8. Tenant has no rights or
options to purchase the Property. 
 9. To Tenant’s knowledge, no hazardous wastes have been generated, treated, stored or disposed of
by or on behalf of Tenant in, on or around the Premises or the Project in violation of any environmental laws. 
 10. The undersigned has
executed this Estoppel Certificate with the knowledge and understanding that [INSERT NAME OF LANDLORD, PURCHASER OR LENDER, AS APPROPRIATE] or its assignee is acquiring the Property in reliance on this certificate and that the undersigned shall be
bound by this certificate. The statements contained herein may be relied upon by [INSERT NAME OF PURCHASER OR LENDER, AS APPROPRIATE], [LANDLORD], BioMed Realty, L.P., BioMed Realty Trust, Inc., and any [other] mortgagee of the Property and their
respective successors and assigns. 
 Any capitalized terms not defined herein shall have the respective meanings given in the Lease. 

Dated this [        ] day of
[                    ], 20[    ]. 

[            ], 

a [            ] 
  

			
	 By:
	 	  

	 Name:
	 	  

	 Title:
	 	  

  
 G-2 

 EXHIBIT H 

FORM OF CONVERTIBLE UNSECURED PROMISSORY NOTE 

  
 H-1 

 THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
“ACT”). OR ANY STATE SECURITIES LAWS. THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD EXCEPT AS PERMITTED UNDER THE ACT AND THE APPLICABLE STATE SECURITIES LAWS,
PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. HOLDERS SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR THE FINANCIAL RISKS OF THIS INVESTMENT FOR AN INDEFINITE PERIOD OF TIME. 

SUBORDINATED CONVERTIBLE UNSECURED PROMISSORY NOTE 

December 22, 2011 
 San Diego,
California 
 For value received, aTyr Pharma, Inc., a Delaware corporation (the “Company”), promises to pay to BioMed
Realty, L.P., a Maryland limited partnership (“Holder”), the principal amount of Two Million Dollars ($2,000,000.00) (the “Principal Amount”). Reference is made to that certain Lease, dated as of December 22,
2011, as amended from time to time (the “Lease”), by and between the Company and BMR-John Hopkins Court LLC, a wholly owned subsidiary of Holder (“Landlord”). Capitalized terms used herein but not defined herein
shall have the meanings ascribed to them in the Lease. Interest on the Principal Amount shall accrue, compounded annually, at a rate equal to eight percent (8%) per annum (the “Interest Rate”), commencing on the date hereof.
The Interest Rate shall be computed on the basis of the actual number of days elapsed and a year of 365 days. This Subordinated Convertible Unsecured Promissory Note (this “Note”) is subject to the following terms and conditions.

 1 Maturity. Unless earlier converted pursuant to Section 3 hereof, the principal and any accrued but unpaid interest under this Note
shall be due and payable on the earliest of (i) the three-year anniversary of the Phase I Term Commencement Date under the Lease, (ii) a Liquidation Event (as defined in the Company’s Amended and Restated Certificate of Incorporation
as amended from time to time (the “COI”)) or (iii) the closing of an initial firm commitment underwritten public offering of common stock of the Company pursuant to a registration statement under the Act (such date, the
“Maturity Date”). 
 2 Payment. 

2.1 Unless this Note is converted pursuant to Section 3 hereof, or interest hereunder is forgiven pursuant to
Section 9 hereof, any Principal Amount and any accrued but unpaid interest under this Note then outstanding shall be due and payable on the Maturity Date. Payment shall be credited first to costs of collection or enforcement, if any,
then to accrued interest due and payable through such payment date, and the remainder applied to the Principal Amount. 
 2.2 With the prior
written consent of the Holder, the Company may prepay this Note in full, but not in part. The Company shall deliver to the Holder written notice of its 

 
intended prepayment at least twenty (20) days in advance of the intended prepayment date. 
 3
Conversion of the Note. 
 3.1 Elective Conversion into New Preferred Stock. If the Company completes a Threshold New
Preferred Financing, then at any time prior to the Maturity Date, at Holder’s election and exercisable by written notice to the Company, Holder may elect to convert, in whole but not in part, the Principal Amount into that number of fully paid
and nonassessable shares of the Company’s New Preferred Stock equal to the quotient obtained by dividing the Principal Amount by the New Series Price (as equitably adjusted to reflect any stock split, stock dividend, combination, consolidation,
reorganization, recapitalization, reclassification or other similar event involving the New Preferred Stock after the date of issuance of the New Preferred Stock, but excluding any Stock Distribution (as defined below) received by Holder). Upon
conversion into New Preferred Stock, Holder agrees to execute and shall become a party to and have substantially the same rights as the other holders of New Preferred Stock, including, but not limited to, those rights as set forth in the COI, any
stock purchase agreement, registration rights agreement, investor rights agreement, voting agreement or similar agreement governing the New Preferred Stock and/or the holders thereof in effect as of the date of conversion. For the avoidance of
doubt, if the Company completes a Threshold New Preferred Financing, Holder shall have the rights of conversion set forth in this Section 3.1, and shall not have rights of conversion as set forth in Section 3.2 below. 

3.2 Elective Conversion into Series C Preferred Stock. If the Company does not complete a Threshold New Preferred Financing, or effects
a Liquidation Event prior to a Threshold New Preferred Financing, then at any time and from time to time following the earlier of (i) Holder’s receipt of notice of the Liquidation Event under Section 14 below and
(ii) June 30, 2013, at Holder’s election and exercisable by written notice to the Company, Holder may elect to convert, in whole but not in part, the Principal Amount into 1,934,236 fully paid and nonassessable shares of Series C
Preferred Stock of the Company (as equitably adjusted to reflect any stock split, stock dividend, combination, consolidation, reorganization, recapitalization, reclassification or other similar event involving the Series C Preferred Stock after the
Effective Time (as defined in the COI), but excluding any Stock Distribution received by Holder). Upon conversion into Series C Preferred Stock, Holder agrees to execute and shall become a party to and have substantially the same rights as the other
holders of Series C Preferred Stock, including, but not limited to, those rights as set forth in the COI, any stock purchase agreement, registration rights agreement, investor rights agreement, voting agreement or similar agreement governing the
Series C Preferred Stock and/or the holders thereof in effect as of the date of conversion. The Company shall take all actions reasonably necessary to give effect to the conversion rights set forth in this Section 3. 

For purposes of this Note: 

  
 2 

 “Threshold New Preferred Financing” means the sale (or series of related sales)
by the Company of New Preferred Stock on or before June 30, 2013 to one or more investors in an aggregate amount of not less than Fifteen Million Dollars ($15,000,000.00) (excluding the exchange, conversion or cancellation of this Note or any
notes or warrants issued prior to the date hereof), which includes at least one investor (who is not a current investor in the Company as of the date hereof) that commits Two Million Dollars ($2,000,000.00) or more in such financing. 

“New Series Price” means the lowest price paid per share for the New Preferred Stock by investors in the Threshold New
Preferred Financing. 
 “New Preferred Stock” means the Company’s series of preferred stock issued in connection with
the Threshold New Preferred Financing. 
 3.3 Mechanics and Effect of Conversion. Upon conversion of this Note, any interest payable
in respect of the Principal Amount shall be immediately forgiven and shall not converted into New Preferred Stock, Series C Preferred Stock or any other shares of the capital stock of the Company. No fractional shares of the Company’s capital
stock will be issued upon conversion of the Note. In lieu of any fractional share to which Holder would otherwise be entitled, the Company will pay to Holder in cash the amount of the unconverted principal balance of the Note that would otherwise be
converted into such fractional share. Upon conversion of the Note pursuant to this Section 3. Holder shall surrender the Note, duly endorsed, at the principal offices of the Company or any transfer agent of the Company (or a notice to
the effect that the original Note has been lost, stolen or destroyed and an agreement reasonably acceptable to the Company whereby the Holder agrees to indemnify the Company from any loss incurred by it in connection with this Note);
provided, that upon conversion pursuant hereto, this Note shall be deemed cancelled and of no further force and effect, whether or not it is delivered for cancellation as set forth in this sentence. At its expense, the Company will, as soon as
practicable and in any event within ten (10) days thereafter, issue and deliver to Holder, at Holder’s principal office, a certificate or certificates for the number of shares to which Holder is entitled upon such conversion, and a check
payable to Holder for any cash amounts payable as described herein. Upon conversion of this Note, the Company will be forever released from all of its obligations and liabilities under this Note with regard to the Principal Amount being converted
and any interest which has accrued thereon, including without limitation the obligation to pay such portion of the Principal Amount and any accrued interest. 

3.4 No Rights as Stockholder. This Note does not by itself entitle the Holder to any voting rights or other rights as a stockholder of
the Company, other than as set forth in Section 9 below. In the absence of conversion of this Note, no provision of this Note, and no enumeration herein of the rights or privileges of the Holder shall cause the Holder to be a stockholder
of the Company for any purpose, other than as set forth in Section 9 below. 
 4 Representations and Warranties of the Company. The
Company represents and warrants to Holder as of the date hereof, and with respect to Sections 4.6 and 4.7 for so 

  
 3 

 
long as Holder, or an affiliate of Holder, holds the Note or any equity securities issued to Holder pursuant to the terms hereof, as follows: 

4.1 Organization, Good Standing and Qualification. The Company is a corporation duly organized, validly existing and in good standing
under the laws of the State of Delaware and has all requisite corporate power and authority to own and operate its properties and assets and to carry on its business as presently conducted. The Company is duly qualified to transact business and is
in good standing in each jurisdiction in which the failure so to qualify would have a material adverse effect on its business or properties. 

4.2 Authorization. All corporate action on the part of the Company, its officers, directors and stockholders necessary for the
authorization, sale, issuance and delivery of the Note and the performance of all obligations of the Company under the Note has been taken prior to the date hereof. The Note constitutes a valid and legally binding obligation of the Company,
enforceable against the Company in accordance with its terms, except (i) as limited by applicable bankruptcy, insolvency, reorganization, moratorium, fraudulent conveyance and other laws of general application affecting enforcement of
creditors’ rights generally, and (ii) as limited by laws relating to the availability of specific performance, injunctive relief or other equitable remedies. Any equity securities of the Company or of any Related Entity (as defined below)
issuable to Holder hereunder have been or will be duly reserved for issuance, and upon issuance in accordance with the terms of the Note, will be validly issued, fully paid and non- assessable and free of restrictions on transfer other than
restrictions contained in this Note and applicable federal and state securities laws. The issuance of the Note and the issuance of any such equity securities issuable hereunder are not and will not be subject to preemptive rights of any present or
future debt or equity holders of the Company or any Related Entity. 
 4.3 Governmental Consent. No consent, approval, order or
authorization of, or registration, qualification, designation, declaration or filing with, any federal, state or local governmental authority on the part of the Company is required in connection with the valid execution, delivery and performance by
the Company of the Note and the transactions contemplated thereby, except for filings pursuant to Section 25102(f) of the California Corporate Securities Law of 1968, as amended, and the rules thereunder, other applicable state securities laws
and Regulation D of the Act, all of which filings will be timely effected after the date hereof. 
 4.4 Compliance with Other
Instruments. The Company is not in violation or default of any provision of its COI or bylaws currently in effect. The Company is not in violation of, or default under any provision of any instrument, mortgage, deed of trust, loan, contract,
commitment or obligation to which it is a party or by which it or any of its properties are bound, which violations or defaults, individually or in the aggregate, would materially adversely affect the business, properties or condition (financial or
otherwise) of the Company. The Company is not in violation of any provision of any federal, state or local statute, rule or governmental regulation which would materially adversely affect the business, properties or condition (financial or
otherwise) of the Company or any judgment, decree or order to which it is a party. The Company has all franchises, 

  
 4 

 
permits, licenses and any similar authority necessary for the conduct of its business, the lack of which could materially adversely affect the business, properties or condition (financial or
otherwise) of the Company. The Company is not in default in any material respect under any of such franchises, permits, licenses or other similar authority. 

4.5 Percentage of Outstanding Securities. This Note, together with the aggregate securities actually issued and/or potentially issuable
under this Note (assuming for this purpose conversion of the Note into shares of Series C Preferred Stock pursuant to Section 3.2 above), represent less than ten percent (10.0%) of the voting interest and less than ten percent
(10.0%) of the value of the outstanding debt and equity securities of the Company or any Related Entity, as applicable. 
 4.6
Health Care / Lodging Facilities. Neither the Company nor any Related Entity currently operates or manages, or in the future will operate or manage, any health care facilities (including a congregate care facility or assisted living facility)
or lodging facilities or provide any person, under a franchise, license or otherwise, rights to any brand name under which any lodging facility or health care facility is operated. 

4.7 Financial Information. The Company shall furnish to Holder, as soon as practicable and in any event within ten (10) days after
the date of such request, a statement showing the capitalization of the Company and any Related Entity, including but not limited to the total number of outstanding securities of each class and series of capital stock of the Company and such Related
Entity, in sufficient detail as to permit Holder to calculate its percentage ownership in securities of the Company and such Related Entity and voting power to elect directors to their respective Board of Directors. 

5 Representations and Warranties of Holder. Holder hereby represents and warrants to the Company as of the date hereof that: 

5.1 Experience. Holder is experienced in investing in the securities of development stage companies such as die Company and
acknowledges that investment in the Securities (as defined below) involves a number of significant risks, it is able to fend for itself, it can bear the economic risk of its investment, including the full loss of its investment, and it has such
knowledge and experience in financial or business matters that it is capable of evaluating the merits and risks of the investment in the Securities. Holder also represents it was not organized solely for the purpose of acquiring the Securities. As
used herein, “Securities” shall mean this Note and the equity securities issuable hereunder (and the securities issuable upon conversion of such equity securities). 

5.2 Accredited Investor. Holder represents that it is an “accredited investor” within the meaning of Rule 501(a) of the Act.

 5.3 Purchase Entirely for Own Account. This Note is issued to Holder in reliance upon Holder’s representation to the Company,
which by Holder’s purchase of this Note, Holder hereby confirms, that the Securities to be received by Holder will be acquired for investment for Holder’s own account, not as a nominee or agent, and not with a view to the resale or
distribution of any part thereof, and that Holder has no present intention of 

  
 5 

 
selling, granting any participation in, or otherwise distributing the same. Holder further represents that it does not have any contract, undertaking, agreement or arrangement with any person to
sell, transfer or grant participations to such person or to any third person, with respect to the Securities. 
 5.4 Restricted
Securities. Holder understands that the Securities are characterized as “restricted securities” under the federal securities laws inasmuch as they are being acquired from the Company in a transaction not involving a public offering and
that under such laws and applicable regulations such Securities may be resold without registration under the Act only in certain limited circumstances. In this connection, Holder represents that it is familiar with Rule 144, as presently in effect,
and understands the resale limitations imposed thereby and by the Act. Holder must bear the economic risk of this investment indefinitely unless the Securities are registered pursuant to the Act, or an exemption from registration is available.
Holder understands that the Company has no present intention of registering the Securities. Holder also understands that there is no assurance that any exemption from registration under the Act will be available and that, even if available, such
exemption may not allow Holder to transfer all or any portion of the Securities under the circumstances, in the amounts or at the times Holder might propose. 

5.5 No Public Market. Holder understands that no public market now exists for any of the securities issued by the Company and that the
Company has made no assurances that a public market will ever exist for the Securities. 
 6 Restrictions on Transfer. Holder hereby acknowledges
that the Securities shall not be transferred except upon the conditions specified in this Section 6, which conditions are intended to insure compliance with the provisions of the Act. Holder may not assign, pledge, or otherwise transfer
this Note without the prior written consent of the Company, except for transfers to any of the Holder’s affiliates, partners, members, affiliated funds or entities under common control, or to the estate of any of its partners or members. Holder
will cause any proposed transferee of Securities held by Holder to agree to take and hold such Securities subject to the provisions and upon the conditions specified in the Note. 

6.1 Legends. Each certificate representing the Securities or any securities of the Company issued to Holder upon any stock split, stock
dividend, recapitalization, merger, consolidation or similar event, shall (unless otherwise permitted or unless the securities evidenced by such certificate shall have been registered under the Act) be stamped or otherwise imprinted with a legend
substantially in the following form (in addition to any legend required under applicable state securities laws): 
 “THE SECURITIES
REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR ANY STATE SECURITIES LAWS. THESE SECURITIES ARE SUBJECT TO RESTRICTIONS ON TRANSFERABILITY AND RESALE AND MAY NOT BE
TRANSFERRED OR RESOLD EXCEPT AS PERMITTED UNDER 

  
 6 

 
THE ACT AND THE APPLICABLE STATE SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM. HOLDERS SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR THE FINANCIAL RISKS OF THIS INVESTMENT
FOR AN INDEFINITE PERIOD OF TIME.” 
 6.2 Notice of Proposed Transfers. The holder of each certificate representing the
Securities required to bear the legend set forth in Section 6.1 by acceptance thereof agrees to comply in all respects with the provisions of this Section 6. Prior to any proposed transfer of any Securities, the holder
thereof shall give written notice to the Company of such holder’s intention to effect such transfer. Each such notice shall describe the manner and circumstances of the proposed transfer in sufficient detail, and shall be accompanied (except in
transactions involving the distribution without consideration of such Securities by a holder to any of its affiliates, partners, members, affiliated funds or entities under common control, or to die estate of any of its partners or members) by
either: 
 6.2.1 a written opinion of legal counsel who shall be reasonably satisfactory to the Company, addressed to the Company and
reasonably satisfactory in form and substance to the Company’s counsel, to the effect that the proposed transfer of the Securities may be effected without registration under the Act; or 

6.2.2 a “no-action” letter from the Securities and Exchange Commission to the effect that the distribution of such Securities
without registration will not result in a recommendation by the staff of the Securities and Exchange Commission that action be taken with respect thereto, whereupon the holder of such Securities shall be entitled to transfer such Securities in
accordance with the terms of the notice delivered by such holder to the Company. 
 Each certificate evidencing the Securities transferred as above provided
shall bear the restrictive legend set forth in Section 6.1 above, except that such certificate shall not bear such restrictive legend if the opinion of counsel or “no-action” letter referred to above expressly indicates that
such legend is not required in order to establish compliance with the Act or if such legend is no longer required pursuant to Rule 144. Notwithstanding the foregoing, Holder may transfer the Securities at any time to an affiliate of Holder as deemed
necessary or advisable, in Holder’s discretion, to ensure BioMed Realty Trust, Inc.’s compliance with requirements relating to BioMed Realty Trust, Inc.’s status as a real estate investment trust for federal income tax purposes,
without having to provide to the Company the documentation contained in Section 6.2.1 or 6.2.2. 
 7 Assignment. Subject to the
restrictions on transfer set forth in Section 6 and this Section 7 of the Note, the rights and obligations of the Company and Holder will be binding upon and inure to the benefit of the successors, assigns, heirs,
administrators and transferees of the parties. 
 8 Events of Default. Upon the occurrence or existence of any Event of Default (as defined below)
and at any time thereafter during the continuance of an Event of Default, 

  
 7 

 
the entire Principal Amount of this Note, together with all unpaid accrued interest thereon, and all unpaid fees, charges, costs and expenses, if any, owed by the Company to the Holder hereunder,
may become or may be declared by the Holder to be immediately due and payable. In addition to the foregoing remedies, upon the occurrence or existence of any Event of Default, the Holder may exercise any other right, power or remedy permitted to it
by applicable law, either by suit in equity or by action at law, or both. 
 8.1 Events of Default. The occurrence of any one or more
of the following events with respect to the Company constitutes an “Event of Default” hereunder: 
 (a) The
Company breaches any covenant or obligation in this Note, and fails to cure such breach within thirty (30) days of such breach; 

(b) The Company fails to pay timely any of the Principal Amount due under this Note on the date the same becomes due and
payable or any accrued interest or other amounts due under this Note on the date the same becomes due and payable; 
 (c) The
dissolution, termination of existence of the Company or inability of the Company to pay its debts as they become due, or appointment of a receiver, trustee or custodian, for all or any part of the property of the Company under any reorganization,
bankruptcy, insolvency, arrangement, readjustment of debt, dissolution or liquidation law or statute of any jurisdiction, now or in the future in effect; or 

(d) The commencement of any proceeding against the Company under any reorganization, bankruptcy, insolvency, arrangement,
readjustment of debt, dissolution or liquidation law or statute of any jurisdiction, now or in the future, if within sixty (60) days after the commencement of such proceeding (i) such action has not been dismissed or all orders or
proceedings thereunder affecting the operations or the business of the Company stayed, or (ii) the stay of any such order or proceedings has been set aside. 

8.2 Default Rate. As long as any payment due under this Note remains past due (whether at the stated maturity, by acceleration or
otherwise) for five (5) days or more, interest under this Note shall accrue on such overdue payment at a rate (the “Default Rate”) (which is in lieu of and not in addition to the Interest Rate) equal to the lesser of twelve
percent (12%) per annum or the maximum rate permitted by applicable law from the date of such non-payment until such amount is paid in full (whether after or before judgment). 

8.3 Payment of Expenses. Following the occurrence of an Event of Default, the Company shall pay, on demand, all reasonable costs and
expenses of collection of this Note (including reasonable attorneys’ fees, costs and disbursements) in respect of such Event of Default, whether or not any suit or other legal proceedings shall be instituted. 

8.4 No Usury. Payments of interest shall not be required, for any period for which interest is computed hereunder, to the extent that
contracting for or receipt thereof would 

  
 8 

 be contrary to provisions of any applicable law to the Holder limiting the highest rate of interest that may be
lawfully contracted for, charged or received by the Holder, as determined by a final judgment of a court of competent jurisdiction. Any interest paid in excess of such highest rate shall be applied to the unpaid principal balance of this Note. In
the event that any such excess exceeds the principal amount, the amount of such xcess over the principal amount shall be refunded to the Company. 

9 Certain Stock Distributions. In the case of any stock dividend, stock distribution or similar transaction (any such transaction, a
“Stock Distribution”) by the Company of shares of the capital stock or other securities of any Related Entity (“Distribution Securities”) after the date of issuance of this Note and prior to the conversion of this
Note by Holder, Holder shall be entitled to receive, and the Company shall promptly deliver to Holder, such number of the Distribution Securities as shall be issued or distributed pursuant to such Stock Distribution as if Holder is a holder of
1,934,236 shares of Series C Preferred Stock of the Company (as equitably adjusted to reflect any stock split, stock dividend, combination, consolidation, reorganization, recapitalization, reclassification or other similar event involving the Series
C Preferred Stock after the Effective Time) (such shares of Series C Preferred Stock, the “Deemed Held Stock”) as of the record date determined by the Company’s Board of Directors for such Stock Distribution. Holder shall be
deemed to be a holder of such Deemed Held Stock solely for purposes of this Section 9 and shall otherwise have no other rights in, to or by reason of this Section 9 in the Deemed Held Stock, including, but not limited to, any
rights of a stockholder or rights otherwise associated with ownership of shares of capita] stock. The right of the Holder to receive any Distribution Securities pursuant to this Section 9 is subject to and conditioned upon Holder
agreeing to enter into such agreements with the Company and/or any Related Entity as the holders of a majority of the shares of Series C Preferred Stock of the Company have entered into and/or are subject to with respect to such holders’
ownership of any Distribution Securities; provided that if Holder receives any Distribution Securities from the Company and thereafter elects not to convert the Note prior to the Maturity Date, upon payment in full by the
Company of any and all principal and interest then due and payable hereunder, Holder shall promptly surrender all such Distribution Securities to the Company (or such Related Entity as may be designated by the Company) and waive any and all rights
in and to such securities. As used herein, “Related Entity” shall mean any entity initially formed, organized or otherwise established as a subsidiary or other affiliate of the Company, either prior to, at or after the date of this
Note, regardless of whether or not the Company thereafter continues to hold any equity or other ownership interest therein. In the event that Holder receives aggregate cash proceeds derived from Holder’s Distribution Securities exceeding Three
Million Five Hundred Thousand Dollars ($3,500,000.00) prior to the Maturity Date, then any accrued but unpaid interest under this Note shall be forgiven and no interest under this Note shall thereafter accrue or otherwise be payable by the Company
with respect hereto. 
 10 Subordination. Holder agrees that payment of amounts due under this Note is expressly subordinated to
the prior payment of, and shall rank junior in priority to, all amounts due by the Company under that certain Loan and Security Agreement dated as of March 18, 2011 by and between the Company and Comerica Bank (“Comerica”), as
 

  
 9 

 
the same may be amended from time to time. To the extent requested by Comerica, the Holder and the Company shall enter into a reasonable and customary subordination agreement providing for such
subordination and other related terms as described in the preceding sentence. 
 11 Early Termination of Lease. If at any time prior to the
Maturity Date the Lease terminates, other than as a result of a Default by the Company, a portion of the Principal Amount equal to the amount to be deemed as a credit against the Base Rent (as defined in the Lease) for months under the Lease which
have not, as of such termination date, elapsed, shall immediately be forgiven and no longer deemed to be outstanding, due or otherwise payable hereunder. 

12 Governing Law. This Note and all acts and transactions pursuant hereto and the rights and obligations of the parties hereto shall be
governed, construed and interpreted in accordance with the laws of the State of California, without giving effect to principles of conflicts of law. 

13 Notices. All notices and other communications required or permitted hereunder shall be in writing and shall be deemed effectively
given upon personal delivery, upon three (3) business days after deposit with the United States Post Office, by registered or certified mail, return receipt requested, postage prepaid, one (1) business day after deposit with a nationally
recognized air courier, or upon receipt of confirmation with regard to delivery by facsimile and addressed: (a) if to Holder, at Holder’s address as set forth on Holder’s signature page hereto, or at such other address as Holder shall
have furnished to the Company in writing, or (b) if to the Company, at its current address or at such other address as the Company shall have furnished to Holder in writing. 

14 Notification of Certain Events. The Company shall provide Holder with at least ten (10) days prior written notice of any
Liquidation Event. 
 15 Amendments and Waivers. Any term of this Note may be amended and the observance of any term of this
Note may be waived (either generally or in a particular instance and either retroactively or prospectively), only with the written consent of the Company and the Holder. Any amendment or waiver effected in accordance with this Section 15
shall be binding upon Holder and the Company. 
 16 Lost Documents. Upon receipt by the Company of evidence and indemnity reasonably
satisfactory to it of the loss, theft, destruction or mutilation of, and upon surrender and cancellation of this Note, if mutilated, the Company will make and deliver in lieu of this Note a new note of the same series and of like tenor and unpaid
Principal Amount and dated as of the date to which interest, if any, has been paid on the unpaid Principal Amount of this Note. 
 17 Waivers and
Rights of Holder. The Company hereby waives demand, presentment for payment, protest, notice of nonpayment, notice of protest, notice of dishonor, and any other notices of any kind, and any and all exemption rights that it holds at law or in
equity with respect to the indebtedness evidenced by this Note. 

  
 10 

 18 Attorneys’ Fees. If any action at law or in equity is necessary to enforce or interpret the
terms of this Note, the prevailing party shall be entitled to reasonable attorneys’ fees, costs and disbursements in addition to any other relief to which such party may be entitled. 

19 Severability. If one or more provisions of this Note are held to be unenforceable under applicable law, such provision shall be excluded from
this Note and the balance of this Note shall be interpreted as if such provision were so excluded and shall be enforceable in accordance with its terms. 

20 California Corporate Securities Law. THE SALE OF THE SECURITIES WHICH ARE THE SUBJECT OF THIS NOTE HAS NOT BEEN QUALIFIED WITH THE
COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE OF SUCH SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE CONSIDERATION THEREFOR PRIOR TO THE QUALIFICATION IS UNLAWFUL UNLESS THE SALE OF SECURITIES IS EXEMPT FROM THE
QUALIFICATION BY SECTION 25100, 25102, OR 25105 OF THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF ALL PARTIES TO THIS NOTE ARE EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT. 

21 Counterparts. This Note may be executed in two or more counterparts (including by facsimile or PDF copy), each of which shall be deemed an
original and all of which together shall constitute one instrument. 
 (Signature Page Follows) 

  
 11 

 The parties have executed this Subordinated Convertible Unsecured Promissory Note as of the date
first written above. 
  

									
	COMPANY:	 		  	HOLDER:
			
	ATYR PHARMA, INC.	 		  	BIOMED REALTY, L.P.
					
	By:	 	 /s/ Andrew Cubitt
	 		  	By:	 	 /s/ Brian Wolfe

	Name:	 	Andrew Cubitt	 		  	Name:	 	Brian Wolfe
	Title:	 	VP, Intellectual Property	 		  	Title:	 	Corporate Counsel, Asst. Secretary
					
		 		 		  	Address:	 	 17190 Bernardo Center Drive
 San Diego, CA
92128
 Attn: Corporate Legal

 IN WITNESS WHEREOF, the parties hereto have executed this Lease as of the date first above
written. 
  

			
	 LANDLORD:

	
	 BMR-JOHN HOPKINS COURT LLC,
 a
Delaware limited liability company

		
	By:	 	 /s/ Brain Wolfe

	Name:	 	Brian Wolfe
	Title:	 	Corporate Counsel, Asst. Secretary
	
	TENANT:
	
	 ATYR PHARMA, INC.,
 a Delaware
corporation

		
	By:	 	 /s/ Andrew Cubitt

	Name:	 	Andrew Cubitt
	Title:	 	VP, Intellectual Property

 If the foregoing accurately sets forth the agreements that the Company and BioMed have reached
with respect to the subject matter hereof, please indicate your agreement to the terms contained herein by countersigning in the place indicated below. 
  

			
	 Sincerely,

	
	ATYR PHARMA, INC.
		
	By:	 	 /s/ Andrew Cubitt

	Name:	 	Andrew Cubitt
	Title:	 	VP, Intellectual Property

  

			
	 AGREED AND ACCEPTED:

	
	 BIOMED REALTY, L.P.

		
	By:	 	 /s/ Brian Wolfe

	Name:	 	Brian Wolfe
	Title:	 	Corporate Counsel, Asst. SecretaryEX-10.10

 Exhibit 10.10 

LOAN AND SECURITY AGREEMENT 

THIS LOAN AND SECURITY AGREEMENT (this “Agreement”) dated as of April 25, 2012 (the “Effective
Date”) between SILICON VALLEY BANK, a California corporation (“Bank”), and ATYR PHARMA, INC., a Delaware corporation (“‘Borrower”), provides the terms on which Bank shall lend to Borrower
and Borrower shall repay Bank. The parties agree as follows: 
  

	1	ACCOUNTING AND OTHER TERMS 

 Accounting terms not defined in this Agreement shall be
construed following GAAP. Calculations and determinations must be made following GAAP. Capitalized terms not otherwise defined in this Agreement shall have the meanings set forth in Section 13. All other terms contained in this Agreement,
unless otherwise indicated, shall have the meanings provided by the Code to the extent such terms are defined therein. 
  

	2	LOAN AND TERMS OF PAYMENT 

 2.1 Promise to Pay. Borrower hereby unconditionally
promises to pay Bank the outstanding principal amount of all Credit Extensions and accrued and unpaid interest thereon as and when due in accordance with this Agreement. 

2.1.1 Growth Capital Loan. 

(a) Availability. Subject to the terms and conditions of this Agreement, Bank agrees to make advances to Borrower (each a
“Growth Capital Advance” and collectively the “Growth Capital Advances”), from time to time, prior to the Growth Capital Commitment Termination Date, in an aggregate amount not to exceed the Growth Capital Loan
Commitment. 
 (i) One Million Two Hundred Fifty Thousand Dollars ($1,250,000) of the Growth Capital Loan Commitment (the “First
Tranche”) shall be funded in one (1) Growth Capital Advance on or about the Effective Date. After repayment, the Growth Capital Advance under the First Tranche may not be reborrowed. 

(ii) Subject to the terms of this Agreement, the remaining One Million Two Hundred Fifty Thousand Dollars ($1,250,000) of the Growth Capital
Loan Commitment (the “Second Tranche”) shall be funded in one (1) Growth Capital Advance between July 31, 2012 and that date which is six (6) months following the Effective Date, as requested in writing by Borrower,
provided that Bank’s calls with Borrower’s investors shall have yielded diligence results satisfactory to Bank in its good faith sole discretion. After repayment, the Growth Capital Advance under the Second Tranche may not be reborrowed.

 (b) Repayment of Growth Capital Advance. 

(i) Interest-Only Payments. For each Growth Capital Advance, Borrower shall make monthly payments of interest-only commencing on the
first (1st) Business Day of the first (1st) month following the month in which the Funding Date occurs with respect to such Growth
Capital Advance and continuing thereafter during the Interest-Only Period, on the first (1st) Business Day of each successive month. 

(ii) Principal and Interest Payments. For each Growth Capital Advance outstanding as of December 31, 2012, Borrower shall make
thirty-six (36) consecutive equal monthly payments of principal plus accrued and unpaid interest, commencing on the first (1st) Business Day of the first (1st) month after the Interest-Only Period (the “Conversion Date”), in principal amounts that would fully amortize the applicable Growth Capital Advance, as of the Conversion Date,
over the Repayment Period. The Final Payment and all unpaid principal and accrued and unpaid interest on each Growth Capital Advance is due and payable in foil on the Growth Capital Maturity Date. 

(c) Voluntary Prepayment. Borrower shall have the option to prepay all Growth Capital Advances in full, provided Borrower
(i) shall provide written notice to Bank of its election to prepay the Growth Capital Advances at least thirty (30) days prior to such prepayment and (ii) pays, on the date of such prepayment, (a) all outstanding principal and
accrued but unpaid interest, plus (b) the Final Payment, plus (c) all other sums, including Bank Expenses, if any, that shall have become due and payable. 

(d) Mandatory Prepayment Upon an Acceleration. If the Growth Capital Advances are accelerated in accordance with the terms of this
Agreement following the occurrence of an Event of Default, Borrower shall immediately pay to Bank an amount equal to the sum of (i) all outstanding principal and accrued but unpaid interest, plus (ii) the Final Payment, plus (iii) all
other sums, including Bank Expenses, if any, that shall have become due and payable in accordance with the terms of this Agreement. 

2.2 Payment of Interest on the Credit Extensions. 

(a) Interest Rate. Subject to Section 2.2(b), the principal amount outstanding for each Growth Capital Advance shall accrue
interest at a per annum rate equal to four and one-half of one percentage points (4.50%) above the Basic Rate, fixed on the Funding Date for each Growth Capital Advance, which shall be payable monthly. 

(b) Default Rate. Immediately upon the occurrence and during the continuance of an Event of Default, Obligations shall bear interest at
a rate per annum which is five percentage points (5.00%) above the rate that is otherwise applicable thereto unless Bank otherwise elects from time to time in its sole discretion to impose a smaller increase. Fees and expenses which are
required to be paid by Borrower pursuant to the Loan Documents (including, without limitation, Bank Expenses) but are not paid when due shall bear interest until paid at a rate equal to the highest rate then applicable to the Obligations. Payment or
acceptance of the increased interest rate provided in this Section 2.2(b) is not a permitted alternative to timely 

  
 2 

 
payment and shall not constitute a waiver of any Event of Default or otherwise prejudice or limit any rights or remedies of Bank. 

(c) Adjustment to Interest Rate. Changes to the interest rate of any Credit Extension based on changes to the Basic Rate shall be
effective on the effective date of any change to the Basic Rate and to the extent of any such change. 
 (d) Computation; 360-Day
Year. In computing interest, the date of the making of any Credit Extension shall be included and the date of payment shall be excluded; provided, however, that if any Credit Extension is repaid on the same day on which it is made,
such day shall be included in computing interest on such Credit Extension. Interest shall be computed on the basis of a 360-day year for the actual number of days elapsed. 

(e) Debit of Accounts. Bank may debit any of Borrower’s deposit accounts, including the Designated Deposit Account, for principal
and interest payments or any other amounts Borrower owes Bank when due. These debits shall not constitute a set-off. 
 (f) Interest
Payment Date. Unless otherwise provided, interest is payable monthly on the first (1st) calendar day of each month. Payments of principal and/or interest received after 12:00 p.m. Pacific
time are considered received at the opening of business on the next Business Day. When a payment is due on a day that is not a Business Day, the payment is due the next Business Day and additional fees or interest, as applicable, shall continue to
accrue until paid. 
 2.3 Fees. Borrower shall pay to Bank the following: 

(a) Final Payment. The Final Payment, when due hereunder; 

(b) Good Faith Deposit. Borrower has paid to Bank a good faith deposit of Ten Thousand Dollars ($10,000) (the “Good Faith
Deposit”) to initiate Bank’s due diligence review process, which amount shall be applied to the Bank Expenses on the Effective Date, with any remaining amount to be refunded to Borrower; and 

(c) Expenses. All Bank Expenses (including reasonable attorneys’ fees and expenses, plus expenses for documentation and
negotiation of this Agreement) incurred through and after the Effective Date, when due. 
  

	3	CONDITIONS OF LOANS 

 3.1 Conditions Precedent to Initial Credit Extension.
Bank’s obligation to make the initial Credit Extension is subject to the condition precedent that Bank shall have received, in form and substance satisfactory to Bank, such documents, and completion of such other matters, as Bank may reasonably
deem necessary or appropriate, including, without limitation: 
 (a) duly executed original signatures to the applicable Loan Documents;

  
 3 

 (b) duly executed original signatures to the Control Agreements with respect to any securities
accounts of Borrower existing as of the Effective Date, including without limitation, any securities accounts held with Bank’s Affiliates; 

(c) the Operating Documents and good standing certificates of Borrower, with regard to each jurisdiction in which Borrower is registered to do
business, such good standing certificates to be certified by the applicable governmental authority as of a date no earlier than thirty (30) days prior to the Effective Date; 

(d) duly executed original signatures to the completed Borrowing Resolutions for Borrower; 

(e) the duly executed original signature to a payoff letter from Comerica Bank; 

(f) Evidence that (i) the Liens securing Indebtedness owed by Borrower to Comerica Bank will be terminated and (ii) the documents
and/or filings evidencing the perfection of such Liens, including without limitation any financing statements and/or control agreements, have or will, concurrently with the initial Credit Extension, be terminated. 

(g) certified copies, dated as of a recent date, of financing statement searches, as Bank shall request, accompanied by’ written evidence
(including any UCC termination statements) that the Liens indicated in any such financing statements either constitute Permitted Liens, or have been, or in connection with the initial Credit Extension will be, terminated or released; 

(h) the Perfection Certificate executed by Borrower; 

(i) evidence satisfactory to Bank that the insurance policies required by Section 6.5 hereof are in full force and effect, together with
appropriate evidence showing lender loss payable and/or additional insured clauses and cancellation notice to Bank (or endorsements reflecting the same) in favor of Bank; and 

(j) payment of the fees and Bank Expenses then due as specified in Section 2.3 hereof. 

3.2 Conditions Precedent to all Credit Extensions. Bank’s obligations to make each Credit Extension, including the initial Credit
Extension, are subject to the following conditions precedent: 
 (a) timely receipt of an executed Payment/Advance Form; 

(b) the representations and warranties in this Agreement shall be true, accurate, and complete in all material respects on the date of the
Payment/Advance Form and on the Funding Date of each Credit Extension; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text
thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all 

  
 4 

 
material respects as of such date, and no Event of Default shall have occurred and be continuing or result from the Credit Extension. Each Credit Extension is Borrower’s representation and
warranty on that date that the representations and warranties in this Agreement remain true, accurate, and complete in all material respects; provided, however, that such materiality qualifier shall not be applicable to any representations and
warranties that already are qualified or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material
respects as of such date; and 
 (c) in Bank’s sole discretion, (i) Bank has not determined that it is the intention of
Borrower’s then existing investors to not continue to fund Borrower in the amounts and timeframe to the extent necessary to enable Borrower to satisfy the Obligations as they become due and payable, and Borrower has not obtained sufficient
commitments of new investors(s) satisfactory to Bank to fund Borrower in the amounts and timeframe to the extent necessary to enable Borrower to satisfy the Obligations as they become due and payable; or (ii) there is a material impairment in
the perfection or priority of the Bank’s security interest in the Collateral. 
 3.3 Covenant to Deliver. Borrower agrees to
deliver to Bank each item required to be delivered to Bank under this Agreement as a condition precedent to any Credit Extension. Borrower expressly agrees that a Credit Extension made prior to the receipt by Bank of any such item shall not
constitute a waiver by Bank of Borrower’s obligation to deliver such item, and any such Credit Extension in the absence of a required item shall be made in Bank’s sole discretion. As soon as possible, but in any event within thirty
(30) days following the Effective Date, Borrower shall have delivered to Bank a Subordination Agreement by BioMed Realty, L.P. (“BioMed”) in favor of Bank, in form and substance satisfactory to Bank, together with the duly
executed original signatures thereto. 
 3.4 Procedures for Borrowing. Subject to the prior satisfaction of all other applicable
conditions to the making of a Credit Extension set forth in this Agreement, to obtain a Credit Extension, Borrower shall notify Bank (which notice shall be irrevocable) by electronic mail, facsimile, or telephone by 12:00 p.m. Pacific time on the
Funding Date of the Credit Extension. Together with any such electronic or facsimile notification, Borrower shall deliver to Bank by electronic mail or facsimile a completed Payment/Advance Form executed by a Responsible Officer or his or her
designee. Bank may rely on any telephone notice given by a person who Bank believes is a Responsible Officer or designee. Bank shall credit Credit Extensions to the Designated Deposit Account. Bank may make Credit Extensions under this Agreement
based on instructions from a Responsible Officer or his or her designee or without instructions if the Credit Extensions are necessary to meet Obligations that have become clue. 

 

	4	CREATION OF SECURITY INTEREST 

 4.1 Grant of Security Interest. Borrower hereby
grants Bank, to secure the payment and performance in full of all of the Obligations, a continuing security interest in, and pledges to Bank, the Collateral, wherever located, whether now owned or hereafter acquired or arising, and all proceeds and
products thereof. Borrower represents, warrants, and covenants that the security interest granted herein is and shall at all times continue to be a first priority perfected security 

  
 5 

 
interest in the Collateral (subject only to Permitted Liens that may have superior priority to Bank’s Lien under this Agreement). If Borrower shall acquire a commercial tort claim, Borrower
shall promptly notify Bank in a writing signed by Borrower of the general details thereof and grant to Bank in such writing a security interest therein and in the proceeds thereof, all upon the terms of this Agreement, with such writing to be in
form and substance reasonably satisfactory to Bank. 
 Borrower acknowledges that it previously has entered, and/or may in the future enter,
into Bank Services Agreements with Bank. Regardless of the terms of any Bank Services Agreement, Borrower agrees that any amounts Borrower owes Bank thereunder shall be deemed to be Obligations hereunder and that it is the intent of Borrower and
Bank to have all such Obligations secured by the first priority perfected security interest in the Collateral granted herein (subject only to Permitted Liens that may have superior priority to Bank’s Lien in this Agreement). 

If this Agreement is terminated, Bank’s Lien in the Collateral shall continue until the Obligations (other than inchoate indemnity
obligations) are satisfied in full, and at such time, Bank shall, at Borrower’s sole cost and expense, terminate its security interest in the Collateral and all rights therein shall revert to Borrower. In the event (x) all Obligations
(other than inchoate indemnity obligations), except for Bank Services, are satisfied in full, and (y) this Agreement is terminated, Bank shall terminate the security interest granted herein upon Borrower providing cash collateral acceptable to
Bank in its good faith business judgment for Bank Services, if any. In the event such Bank Services consist of outstanding Letters of Credit, Borrower shall provide to Bank cash collateral in an amount equal to 105% (110% for Letters of Credit
denominated in a Foreign Currency) of the Dollar Equivalent of the face amount of all such Letters of Credit plus all interest, fees, and costs due or to become due in connection therewith (as estimated by Bank in its good faith business judgment),
to secure all of the Obligations relating to such Letters of Credit. 
 4.2 Authorization to File Financing Statements. Borrower
hereby authorizes Bank to file financing statements, without notice to Borrower, with all appropriate jurisdictions to perfect or protect Bank’s interest or rights hereunder, including a notice that any disposition of the Collateral, by
Borrower or any other Person, shall be deemed to violate the rights of Bank under the Code. 
  

	5	REPRESENTATIONS AND WARRANTIES 

 Borrower represents and warrants as follows: 

5.1 Due Organization, Authorization; Power and Authority. Borrower is duly existing and in good standing as a Registered Organization
in its jurisdiction of formation and is qualified and licensed to do business and is in good standing in any jurisdiction in which the conduct of its business or its ownership of property requires that it be qualified except where the failure to do
so could not reasonably be expected to have a material adverse effect on Borrower’s business. In connection with this Agreement, Borrower has delivered to Bank a completed certificate signed by Borrower, entitled “Perfection
Certificate”. Borrower represents and warrants to Bank that (a) Borrower’s exact legal name is that indicated on the Perfection 

  
 6 

 
Certificate and on the signature page hereof; (b) Borrower is an organization of the type, and is organized in the jurisdiction, set forth in the Perfection Certificate; (c) the
Perfection Certificate accurately sets forth Borrower’s organizational identification number or accurately states that Borrower has none; (d) the Perfection Certificate accurately sets forth Borrower’s place of business, or, if more
than one, its chief executive office as well as Borrower’s mailing address (if different than its chief executive office); (e) Borrower (and each of its predecessors) has not, in the past five (5) years, changed its jurisdiction of
formation, organizational structure or type, or any organizational number assigned by its jurisdiction; and (f) all other information set forth on the Perfection Certificate pertaining to Borrower and each of its Subsidiaries is accurate and
complete (it being understood and agreed that Borrower may from time to time update certain information in the Perfection Certificate after the Effective Date to the extent permitted by one or more specific provisions in this Agreement). If Borrower
is not now a Registered Organization but later becomes one, Borrower shall promptly notify Bank of such occurrence and provide Bank with Borrower’s organizational identification number. 

The execution, delivery and performance by Borrower of the Loan Documents to which it is a party have been duly authorized, and do not
(i) conflict with any of Borrower’s organizational documents, (ii) contravene, conflict with, constitute a default under or violate any material Requirement of Law, (iii) contravene, conflict with or violate any applicable order,
writ, judgment, injunction, decree, determination or award of any Governmental Authority by which Borrower or any its Subsidiaries or any of their property or assets may be bound or affected, (iv) require any action by, filing, registration, or
qualification with, or Governmental Approval from, any Governmental Authority (except such Governmental Approvals that have already been obtained and are in full force and effect) or (v) constitute an event of default under any material
agreement by which Borrower is bound. Borrower is not in default under any agreement to which it is a party or by which it is bound in which the default could reasonably be expected to have a material adverse effect on Borrower’s business. 

5.2 Collateral. Borrower has good title to, has rights in, and the power to transfer each item of the Collateral upon which it purports
to grant a Lien hereunder, free and clear of any and all Liens except Permitted Liens. Borrower has no deposit accounts other than the deposit accounts with Bank, the deposit accounts, if any, described in the Perfection Certificate delivered to
Bank in connection herewith, or of which Borrower has given Bank notice and taken such actions as are necessary to give Bank a perfected security interest therein. Any Accounts that constitute assets of Borrower are bona fide, existing obligations
of the applicable Account Debtors. 
 The Collateral is not in the possession of any third party bailee (such as a warehouse) except as
otherwise provided in the Perfection Certificate. None of the components of the Collateral shall be maintained at locations other than as provided in the Perfection Certificate or as permitted pursuant to Section 7.2. 

All Inventory is in all material respects of good and marketable quality, free from material defects. 

To the best of Borrower’s knowledge, Borrower is the sole owner of the Intellectual Property which it owns or purports to own except for
(a) non-exclusive licenses granted to its 

  
 7 

 
customers in the ordinary course of business and licenses granted to the Related Special Purpose Entities in accordance with the terms of Sections 6.11 and 7.1, (b) over-the-counter software
that is commercially available to the public, and (c) material Intellectual Property licensed to Borrower and noted on the Perfection Certificate. To the best of Borrower’s knowledge, each Patent which it owns or purports to own and which
is material to Borrower’s business is valid and enforceable, and no part of the Intellectual Property which Borrower owns or purports to own and which is material to Borrower’s business has been judged invalid or unenforceable, in whole or
in part. To the best of Borrower’s knowledge, no claim has been made that any part of the Intellectual Property violates the rights of any third party except to the extent such claim would not reasonably be expected to have a material adverse
effect on Borrower’s business. 
 Except as noted on the Perfection Certificate, Borrower is not a party to, nor is it bound by, any
Restricted License. 
 5.3 Litigation. There are no actions or proceedings pending or, to the knowledge of the Responsible Officers,
threatened in writing by or against Borrower or any Subsidiary or any Borrower-owned Related Special Purpose Entity involving more than Fifty Thousand Dollars ($50,000) individually or in the aggregate. 

5.4 No Material Deviation in Financial Statements. All consolidated financial statements for Borrower and any of its Subsidiaries
delivered to Bank fairly present in all material respects Borrower’s consolidated financial condition and Borrower’s consolidated results of operations. There has not been any material deterioration in Borrower’s consolidated
financial condition since the date of the most recent financial statements submitted to Bank. 
 5.5 Solvency. Borrower is not left
with unreasonably small capital after the transactions in this Agreement; and Borrower is able to pay its debts (including trade debts) as they mature, 

5.6 Regulatory Compliance. Borrower is not an “investment company” or a company “controlled” by an “investment
company” under the Investment Company Act of 1940, as amended. Borrower is not engaged as one of its important activities in extending credit for margin stock (under Regulations X, T and U of the Federal Reserve Board of Governors). Borrower
has complied in all material respects with the Federal Fair Labor Standards Act. Neither Borrower nor any Subsidiary or Borrower-owned Related Special Purpose Entity is a “holding company” or an “affiliate” of a “holding
company” or a “subsidiary company” of a “holding company” as each term is defined and used in the Public Utility Holding Company Act of 2005. Borrower has not violated any laws, ordinances or rules, the violation of which
could reasonably be expected to have a material adverse effect on its business. None of Borrower’s, nor any Subsidiary’s or Borrower-owned Related Special Purpose Entity’s properties or assets has been used by Borrower or any
Subsidiary or Related Special Purpose Entity or, to the best of Borrower’s knowledge, by previous Persons, in disposing, producing, storing, treating, or transporting any hazardous substance other than legally. Borrower and each of its
Subsidiaries and Borrower-owned Related Special Purpose Entities have obtained all consents, approvals and authorizations of, made all declarations or filings with, and given all notices to, all Governmental Authorities that are necessary to
continue their respective businesses as currently conducted. 

  
 8 

 5.7 Subsidiaries; Investments. Borrower does not own any stock, partnership interest or
other equity securities except for Permitted Investments. 
 5.8 Tax Returns and Payments; Pension Contributions. Borrower has timely
filed all required tax returns and reports, and Borrower has timely paid all foreign, federal, state and material local taxes, assessments, deposits and contributions owed by Borrower. Borrower may defer payment of any contested taxes, provided that
Borrower (a) in good faith contests its obligation to pay the taxes by appropriate proceedings promptly and diligently instituted and conducted, (b) notifies Bank in writing of the commencement of, and any material development in, the
proceedings, (c) posts bonds or takes any other steps required to prevent the Governmental Authority levying such contested taxes from obtaining a Lien upon any of the Collateral that is other than a “Permitted Lien”. Borrower is
unaware of any claims or adjustments proposed for any of Borrower’s prior tax years that could result in additional taxes becoming due and payable by Borrower. Borrower has paid all amounts necessary to fund all present pension, profit sharing
and deferred compensation plans in accordance with their terms, and Borrower has not withdrawn from participation in, and has not permitted partial or complete termination of, or permitted the occurrence of any other event with respect to, any such
plan that could reasonably be expected to result in any liability of Borrower, including any liability to the Pension Benefit Guaranty Corporation or its successors or any other governmental agency. 

5.9 Use of Proceeds. Borrower shall use the proceeds of the Credit Extensions solely as working capital to fund its general business
requirements and not for personal, family, household or agricultural purposes. 
 5.10 Full Disclosure. No written representation,
warranty or other statement of Borrower in any certificate or written statement given to Bank, as of the date such representation, warranty, or other statement was made, taken together with all such written certificates and written statements given
to Bank, contains any untrue statement of a material fact or omits to state a material fact necessary to make the statements contained in the certificates or statements not misleading (it being recognized by Bank that the projections and forecasts
provided by Borrower in good faith and based upon reasonable assumptions are not viewed as facts and that actual results during the period or periods covered by such projections and forecasts may differ from the projected or forecasted results).

 5.11 Definition of “Knowledge.” For purposes of the Loan Documents, whenever a representation or warranty is made to
Borrower’s knowledge or awareness, to the “best of Borrower’s knowledge, or with a similar qualification, knowledge or awareness means the actual knowledge, after reasonable investigation, of the Responsible Officers. 

 

	6	AFFIRMATIVE COVENANTS 

 Borrower shall do all of the following: 

6.1 Government Compliance. 

(a) Maintain its and all its Subsidiaries’ legal existence and good standing in their respective jurisdictions of formation and maintain
qualification in each jurisdiction in which the failure to so qualify would reasonably be expected to have a material adverse effect on 

  
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Borrower’s business or operations. Borrower shall comply, and have each Subsidiary and each Borrower-owned Related Special Purpose Entity comply, with all laws, ordinances and regulations to
which it is subject, noncompliance with which could have a material adverse effect on Borrower’s business. 
 (b) Obtain all of the
Governmental Approvals necessary for the performance by Borrower of its obligations under the Loan Documents to which it is a party and the grant of a security interest to Bank in the Collateral. Borrower shall promptly provide copies of any such
obtained Governmental Approvals to Bank. 
 6.2 Financial Statements, Reports, Certificates. 

(a) Monthly Financial Statements. As soon as available, but no later than thirty (30) days after the last day of each month,
(i) company prepared consolidated and consolidating balance sheets and income statements covering Borrower’s and each Subsidiary’s consolidated and consolidating operations for such month, (ii) company prepared monthly balance
sheets for each of the Related Special Purpose Entities, and (iii) a detailed breakdown of funds received by Borrower from each of the Related Special Purpose Entities for services rendered and the then-outstanding principal balance of each
loan made by Borrower to a Related Special Purpose Entity, in the case of each of the reports set forth in the foregoing clauses (i) through (iii), certified by a Responsible Officer and in a form acceptable to Bank in its reasonable discretion
(collectively, the “Monthly Financial Statements”); 
 (b) Monthly Compliance Certificate. Within thirty
(30) days after the last day of each month and together with the Monthly Financial Statements and the quarterly financial statements set forth in clause (c) below, a duly completed Compliance Certificate signed by a Responsible Officer,
certifying that as of the end of such month, Borrower was in full compliance with all of the terms and conditions of this Agreement, and setting forth such other information as Bank shall reasonably request; 

(c) Quarterly Financial Statements. As soon as available, but no later than thirty (30) days after the last day of each calendar
quarter, (i) company prepared combined balance sheets and income statements covering Borrower’s, each Subsidiary’s and each Related Special Purpose Entity’s combined operations for such quarter, and (ii) a detailed breakdown
of funds received by Borrower from each of the Related Special Purpose Entities for services rendered and the then-outstanding principal balance of each loan made by Borrower to a Related Special Purpose Entity, certified by a Responsible Officer
and in a form acceptable to Bank in its reasonable discretion; 
 (d) Annual Audited Financial Statements. As soon as available, but
no later than one hundred eighty (180) days after the last day of Borrower’s fiscal year beginning with the 2012 fiscal year, audited consolidated and consolidating (or combined, as applicable) financial statements of Borrower, the
Subsidiaries and the Related Special Purpose Entities, prepared under GAAP, consistently applied, together with an unqualified opinion (other than with respect to a going concern comment typical for venture backed companies) on the financial
statements from an independent certified public accounting firm acceptable to Bank in its reasonable discretion; 

  
 10 

 (e) Other Statements. Within five (5) days of delivery, copies of all financial
statements and reports made available to Borrower’s security holders or to any holders of Subordinated Debt (to the extent not already provided to Bank); 

(f) SEC Filings. In the event that Borrower becomes subject to the reporting requirements under the Exchange Act within five
(5) days of filing, copies of all periodic and other reports, proxy statements and other materials filed by Borrower with the SEC, any Governmental Authority succeeding to any or all of the functions of the SEC or with any national securities
exchange, or distributed to its shareholders, as the case may be. Documents required to be delivered pursuant to the terms hereof (to the extent any such documents are included in materials otherwise filed with the SEC) may be delivered
electronically and if so delivered, shall be deemed to have been delivered on the date on which Borrower posts such documents, or provides a link thereto, on Borrower’s website on the Internet at Borrower’s website address; 

(g) Legal Action Notice. A prompt report of any legal actions pending or threatened in writing against Borrower or any of its
Subsidiaries or Borrower-owned Related Special Purpose Entity that could result in damages or costs to Borrower or any of its Subsidiaries or Borrower-owned Related Special Purpose Entity of, individually or in the aggregate, Fifty Thousand Dollars
($50,000) or more; 
 (h) Financial Projections. As soon as available, but not later than the earlier of seven (7) days after
approval by Borrower’s Board of Directors or sixty (60) days after each fiscal year, annual financial projections for the following fiscal year commensurate in form and substance with those provided to Borrower’s venture capital
investors; and 
 (i) Other Financial Information. Budgets, sales projections, operating plans and other financial information
reasonably requested by Bank. 
 6.3 Inventory; Returns. Keep all Inventory in good and marketable condition, free from material
defects. Returns and allowances between Borrower and its Account Debtors shall follow Borrower’s customary practices as they exist at the Effective Date. Borrower must promptly notify Bank of all returns, recoveries, disputes and claims that
involve more than One Hundred Thousand Dollars ($100,000). 

  
 11 

 6.4 Taxes; Pensions. Timely file, and require each of its Subsidiaries and Borrower-owned
Related Special Purpose Entities to timely file, all required foreign, federal, state and material local tax returns and reports and timely pay, and require each of its Subsidiaries and Borrower-owned Related Special Purpose Entities to timely pay,
all foreign, federal, state and material local taxes, assessments, deposits and contributions owed by Borrower and each of its Subsidiaries and Borrower-owned Related Special Purpose Entities, except for deferred payment of any taxes contested
pursuant to the terms of Section 5.8 hereof, and shall deliver to Bank, on demand, appropriate certificates attesting to such payments, and pay all amounts necessary to fund all present pension, profit sharing and deferred compensation plans in
accordance with their terms. 
 6.5 Insurance. Keep its business and the Collateral insured for risks and in amounts standard for
companies in Borrower’s industry and location and as Bank may reasonably request. Insurance policies shall be in a form, with companies, and in amounts that are satisfactory to Bank in Bank’s reasonable discretion. All property policies
shall have a lender’s loss payable endorsement showing Bank as a lender loss payee and waive subrogation against Bank, and all liability policies shall show, or have endorsements showing, Bank as an additional insured. All policies (or their
respective endorsements) shall provide that the insurer shall give Bank at least twenty (20) days notice before canceling, amending, or declining to renew its policy. At Bank’s request, Borrower shall deliver certified copies of policies
and evidence of all premium payments. Proceeds payable under any policy shall, at Bank’s option, be payable to Bank on account of the Obligations. Notwithstanding the foregoing, (a) so long as no Event of Default has occurred and is
continuing, Borrower shall have the option of applying the proceeds of any casualty policy up to One Hundred Thousand Dollars ($100,000) in the aggregate for all losses under all casualty policies in any one year, toward the replacement or repair of
destroyed or damaged property; provided that any such replaced or repaired property (i) shall be of equal or like value as the replaced or repaired Collateral and (ii) shall be deemed Collateral in which Bank has been granted a first
priority security interest, and (b) after the occurrence and during the continuance of an Event of Default, all proceeds payable under such casualty policy shall, at the option of Bank, be payable to Bank on account of the Obligations. If
Borrower fails to obtain insurance as required under this Section 6.5 or to pay any amount or furnish any required proof of payment to third persons and Bank, Bank may make all or part of such payment or obtain such insurance policies required
in this Section 6.5, and take any action under the policies Bank deems prudent. 
 6.6 Operating Accounts. 

(a) Maintain its primary operating and other deposit accounts and securities accounts with Bank and Bank’s Affiliates, which accounts
shall include Borrower maintaining Collateral Account balances at or through Bank or Bank’s Affiliates representing at least eighty percent (80%) of all Consolidated Cash. 

(b) Provide Bank five (5) days prior written notice before establishing any Collateral Account at or with any bank or financial
institution other than Bank or Bank’s Affiliates. For each Collateral Account that Borrower at any time maintains, Borrower shall cause the applicable bank or financial institution (other than Bank) at or with which any Collateral Account is
maintained to execute and deliver a Control Agreement or other 

  
 12 

 
appropriate instrument with respect to such Collateral Account to perfect Bank’s Lien in such Collateral Account in accordance with the terms hereunder, which control agreements may not be
terminated without the prior written consent of Bank. The provisions of the previous sentence shall not apply to deposit accounts exclusively used for payroll, payroll taxes and other employee wage and benefit payments to or for the benefit of
Borrower’s employees and identified to Bank by Borrower as such. 
 6.7 Reserved. 

6.8 Protection of Intellectual Property Rights. 

(a) (i) Use commercially reasonable efforts to protect, defend and maintain the validity and enforceability of its Intellectual Property;
(ii) promptly advise Bank in writing of material infringements of its Intellectual Property; and (iii) not allow any Intellectual Property material to Borrower’s business to be abandoned, forfeited or dedicated to the public without
Bank’s written consent. 
 (b) Provide written notice to Bank within ten (10) days of entering or becoming bound by any Restricted
License (other than over-the-counter software, that is commercially available to the public). Borrower shall take such commercially reasonable steps as Bank requests to obtain the consent of, or waiver by, any person whose consent or waiver is
necessary for (i) any Restricted License to be deemed “Collateral” and for Bank to have a security interest in it that might otherwise be restricted or prohibited by law or by the terms of any such Restricted License, whether now
existing or entered into in the future, and (ii) Bank to have the ability in the event of a liquidation of any Collateral to dispose of such Collateral in accordance with Bank’s rights and remedies under this Agreement and the other Loan
Documents. 
 6.9 Litigation Cooperation. Make available to Bank, without expense to Bank, Borrower and its officers, employees and
agents and Borrower’s books and records, to the extent that Bank may deem them reasonably necessary to prosecute or defend any third-party suit or proceeding instituted by or against Bank with respect to any Collateral or relating to Borrower.

 6.10 Access to Collateral; Books and Records. Allow Bank, or its agents, at reasonable times, on three (3) Business
Days’ notice (provided no notice is required if an Event of Default has occurred and is continuing), to inspect the Collateral and audit and copy Borrower’s Books. Such inspections or audits shall be conducted no more often than once every
twelve (12) months unless an Event of Default has occurred and is continuing. The foregoing inspections and audits shall be at Borrower’s expense. In the event Borrower and Bank schedule an audit more than ten (10) days in advance,
and Borrower cancels or seeks to reschedule the audit with less than ten (10) days written notice to Bank, then (without limiting any of Bank’s rights or remedies), Borrower shall pay Bank a fee of One Thousand Dollars ($1,000) plus any
out-of-pocket expenses incurred by Bank to compensate Bank for the anticipated costs and expenses of the cancellation or rescheduling. 

6.11 Additional Covenants Regarding Related Special Purpose Entities. Not less than ten (10) Business Days prior to formation of
any Related Special Purpose Entity or prior to any request to make an exclusive license to a Related Special Purpose Entity, Borrower shall 

  
 13 

 
provide Bank with written notice of its intent to form such Related Special Purpose Entity (an “RSPE Notice”), and include in such RSPE Notice: (a) a description of the
individual drug discovery program Borrower intends to license to such Related Special Purpose Entity, (b) whether Borrower is requesting Bank’s written consent to exclusive, licensing of any of Borrower’s Intellectual Property to such
Related Special Purpose Entity (which consent, solely in the case of a request for exclusivity in connection with a transfer of, or the execution of an agreement with a third party entered into in an arm’s length transaction which is reasonably
anticipated to result in a transfer of, such Related Special Purpose Entity from Common Control with Borrower, shall not be unreasonably withheld, conditioned or delayed and will be deemed to have been given by Bank if Bank does not reject such
request in writing within ten (10) Business Days following receipt by Bank of the applicable RSPE Notice), and (c) the aggregate principal amount of any loan Borrower intends to make to such Related Special Purpose Entity (each loan by
Borrower to a Related Special Purpose Entity, an “RSPE Loan”); provided that (x) such RSPE Loan shall not exceed the Individual RSPE Note Threshold, and (y) such RSPE Loan, when taken together with all other RSPE Loans,
shall not exceed the Maximum Aggregate RSPE Loan Amount. Should Borrower make any such RSPE Loan, Borrower shall immediately (a) deliver to Bank the original fully-executed promissory note evidencing such RSPE Loan and any collateral security
for such RSPE Loan, together with appropriate instruments of assignment or transfer, all as Bank may deem necessary or appropriate for Borrower to pledge all of its right, title and interest in such note and collateral security, in form and
substance satisfactory to Bank, and (b) take all other actions reasonably required by Bank to cause such note and collateral to be included in “Collateral” and to perfect and protect Bank’s security interest therein. Any
document, agreement, or instrument executed or issued pursuant to this Section 6.11 shall be a Loan Document. 
 6.12 Further
Assurances. Execute any further instruments and take further action as Bank reasonably requests to perfect or continue Bank’s Lien in the Collateral or to effect the purposes of this Agreement. 

 

	7	NEGATIVE COVENANTS 

 Borrower shall not do any of the following without Bank’s prior
written consent: 
 7.1 Dispositions. Convey, sell, lease, transfer, assign, or otherwise dispose of (collectively,
“Transfer”), or permit any of its Subsidiaries or Borrower-owned. Related Special Purpose Entities to Transfer, all or any part of its business or property, except for Transfers (a) of Inventory hi the ordinary course of
business; (b) of worn-out or obsolete Equipment; (c) in connection with Permitted Liens and Permitted Investments; (d) of non-exclusive licenses for the use of the property of Borrower in the ordinary course of business, (e) of
the equity securities of Borrower-owned Related Special Purpose Entities such that such Related Special Purpose Entities are under Common Control with Borrower; (f) licenses of Intellectual Property to Related Special Purpose Entities that
could not result in a legal transfer of title of the licensed property but that may be exclusive in certain respects, so long as Bank has consented to or approved such licenses in accordance with Section 6,11, and (g) other Transfers not
to exceed Twenty-Five Thousand Dollars ($25,000) in any twelve (12) month period. 
 7.2 Changes in Business, Management, Ownership
or Business Locations. 

  
 14 

 (a) Engage in or permit any of its Subsidiaries to engage in any business other than the
businesses currently engaged in by Borrower and such Subsidiary, as applicable, or reasonably related thereto; (b) liquidate or dissolve; or (c) (i) have a change in management such that the Chief Executive Officer of Borrower ceases
to hold such office and a replacement satisfactory to Borrower’s Board of Directors is not made within ninety (90) days after such departure, (ii) enter into any transaction or series of related transactions in which the stockholders
of Borrower who were not stockholders immediately prior to the first such transaction own more than forty-nine percent (49%) of the voting stock of Borrower immediately after giving effect to such transaction or related series of such
transactions (other than by the sale of Borrower’s equity securities in a public offering or to venture capital investors so long as Borrower identifies to Bank the venture capital investors prior to the closing of the transaction and provides
to Bank a description of the material terms of the transaction), (iii) enter into any transaction or series of related transactions resulting in Borrower ceasing to own at least seventy-five percent (75%) of Pangu, and at least one hundred
percent (100%) of its other Subsidiaries, or (iv) enter into any transaction or series of related transactions resulting in a Related Special Purpose Entity ceasing to be owned by Borrower or under Common Control with Borrower, unless
prior thereto, or in connection therewith, such Related Special Purpose Entity shall have paid to Borrower an aggregate amount equal to or greater than the aggregate principal amount of the RSPE Loan made by Borrower to such Related Special Purpose
Entity. 
 Borrower shall not, without at least thirty (30) days prior written notice to Bank: (1) except with respect to the office relocation
that will occur within ninety (90) days of the date hereof (so long as Borrower notifies Bank immediately upon taking possession of the new premises and, to the extent not previously delivered, delivers to Bank concurrently with such move, a
landlord waiver or subordination agreement reasonably satisfactory to Bank, signed by the landlord of such new office location), add any new offices or other physical business facilities, including warehouses (unless such new offices or business
facilities contain less than Twenty-Five Thousand Dollars ($25,000) in Borrower’s assets or property) or deliver any portion of the Collateral valued, individually or in the aggregate, in excess of Twenty-Five Thousand Dollars ($25,000) to a
bailee at a location other than to a bailee and at a location already disclosed in the Perfection Certificate, (2) change its jurisdiction of organization, (3) change its organizational structure or type, (4) change its legal name, or
(5) change any organizational number (if any) assigned by its jurisdiction of organization. If Borrower intends to deliver any portion of the Collateral valued, individually or in the aggregate, in excess of Twenty-Five Thousand Dollars
($25,000) to a bailee, and Bank and such bailee are not already parties to a bailee agreement governing both the Collateral and the location to which Borrower intends to deliver the Collateral, then Borrower will first receive the written consent of
Bank, and such bailee shall execute and deliver a bailee agreement in form and substance satisfactory to Bank in its sole discretion. 

7.3 Mergers or Acquisitions. Merge or consolidate, or permit any of its Subsidiaries or Borrower-owned Related Special Purpose Entities
to merge or consolidate, with any other Person, or acquire, or permit any of its Subsidiaries or Borrower-owned Related Special Purpose Entities to acquire, all or substantially all of the capital stock or property of another Person. A Subsidiary
may merge or consolidate into another Subsidiary or into Borrower. 

  
 15 

 7.4 Indebtedness. Create, incur, assume, or be liable for any Indebtedness, or permit any
Subsidiary or Borrower-owned Related Special Purpose Entity to do so, other than Permitted Indebtedness. 
 7.5 Encumbrance. Create,
incur, allow, or suffer any Lien on any of its property, or assign, or convey any right to receive income, including the sale of any Accounts, or permit any of its Subsidiaries or Borrower-owned Related Special Purpose Entities to do so, except for
Permitted Liens; permit any Collateral not to be subject to the first priority security interest granted herein; or enter into any agreement, document, instrument or other arrangement (except with or in favor of Bank) with any Person that directly
or indirectly prohibits, or has the effect of prohibiting, Borrower from assigning, mortgaging, pledging, granting a security interest in or upon, or encumbering any of Borrower’s Intellectual Property, except as is otherwise permitted in
Section 7.1 hereof and the definition of “Permitted Lien” herein. 
 7.6 Maintenance of Collateral Accounts. Maintain
any Collateral Account except pursuant to the terms of Section 6.6 hereof. 
 7.7 Distributions; Investments. Pay any dividends
or make any distribution or payment or redeem, retire or purchase any capital stock, other than solely by issuance of capital stock in connection with either (A) the exercise of stock options or warrants by way of cashless exercise, or
(B) in connection with the satisfaction of withholding tax obligations related to the exercise of stock options; provided that (i) Borrower may convert any of its convertible securities into other securities pursuant to the terms of such
convertible securities or otherwise in exchange thereof, (ii) Borrower may pay dividends solely in capital stock of Borrower or any Related Special Purpose Entity; and (iii) Borrower may repurchase the stock of former employees, directors
or consultants pursuant to stock repurchase agreements so long as an Event of Default does not exist at the time of such repurchase and would not exist after giving effect to such repurchase, provided such repurchases do not exceed in the aggregate
of One Hundred Thousand Dollars ($100,000) in any fiscal year; or (a) directly or indirectly make any Investment other than Permitted Investments. 

7.8 Transactions with Affiliates. Directly or indirectly enter into or permit to exist any material transaction with any Affiliate of
Borrower, except for (i) transactions that are in the ordinary course of Borrower’s business, in each case, upon fair and reasonable terms that are no less favorable to Borrower than would be obtained in an arm’s length transaction
with a nonaffiliated Person, and (ii) transactions with Related Special Purpose Entities contemplated by and made in accordance with Sections 6.11 and 7.1 on substantially similar terms to transactions heretofore entered into by Borrower with
its Affiliates. 
 7.9 Subordinated Debt. 

(a) Make or permit any payment on any Subordinated Debt, except under the terms of the subordination, intercreditor, or other similar
agreement to which such Subordinated Debt is subject, or (b) amend any provision in any document relating to the Subordinated Debt that would increase the amount thereof or adversely affect the subordination thereof to Obligations owed to Bank.

  
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 7.10 Compliance. Become an ‘“investment company” or a company controlled by
an “investment company”, under the Investment Company Act of 1940, as amended, or undertake as one of its important activities extending credit to purchase or carry margin stock (as defined in Regulation U of the Board of Governors of the
Federal Reserve System), or use the proceeds of any Credit Extension for that purpose; fail to meet the minimum funding requirements of ERISA, permit a Reportable Event or Prohibited Transaction, as defined in ERISA, to occur; fail to comply with
the Federal Fair Labor Standards Act or violate any other law or regulation, if the violation could reasonably be expected to have a material adverse effect on Borrower’s business, or permit any of its Subsidiaries or Borrower-owned Related
Special Purpose Entities to do so; withdraw or permit any Subsidiary or Borrower-owned Related Special Purpose Entity to withdraw from participation in, permit partial or complete termination of, or permit the occurrence of any other event with
respect to, any present pension, profit sharing and deferred compensation plan that could reasonably be expected to result in any liability of Borrower, including any liability to the Pension Benefit Guaranty Corporation or its successors or any
other governmental agency. 
  

	8	EVENTS OF DEFAULT 

 Any one of the following shall constitute an event of default (an
“Event of Default”) under this Agreement: 
 8.1 Payment Default. Borrower fails to (a) make any payment of
principal or interest on any Credit Extension on its due date, or (b) pay any other Obligations within three (3) Business Days after such Obligations are due and payable (which three (3) Business Day grace period shall not apply to
payments due on the Growth Capital Maturity Date). During the cure period, the failure to make or pay any payment specified in clauses (a) or (b) hereunder is not an Event of Default (but no Credit Extension will be made during the cure
period); 
 8.2 Covenant Default. 

(a) Borrower fails or neglects to perform any obligation in Sections 6.2, 6.4, 6.5, 6.6, 6.8(b), 6.10, or 6.11 or violates any covenant in
Section 7; or 
 (b) Borrower fails or neglects to perform, keep, or observe any other term, provision, condition, covenant or
agreement contained in this Agreement or any Loan Documents, and as to any default (other than those specified in this Section 8) under such other term, provision, condition, covenant or agreement that can be cured, has failed to cure the
default within ten (10) days after the occurrence thereof; provided, however, that if the default cannot by its nature be cured within the ten (10) day period or cannot after diligent attempts by Borrower be cured within such ten
(10) day period, and such default is likely to be cured within a reasonable time, then Borrower shall have an additional period (which shall not in any case exceed thirty (30) days) to attempt to cure such default, and within such
reasonable time period the failure to cure the default shall not be deemed an Event of Default (but no Credit Extensions shall be made during such cure period). Cure periods provided under this section shall not apply, among other things, to
financial covenants or any other covenants set forth in clause (a) above. 

  
 17 

 8.3 Investor Abandonment; Priority of Security Interest. If (i) Bank determines in
its good faith judgment that it is the clear intention of Borrower’s then existing investors to not continue to fund Borrower in the amounts and timeframe to the extent necessary to enable Borrower to satisfy the Obligations as they become due
and payable, and Borrower has not obtained sufficient commitments of new investors(s) satisfactory to Bank to fund Borrower in the amounts and timeframe to the extent necessary to enable Borrower to satisfy the Obligations as they become due and
payable, or (ii) there is a material impairment in the perfection or priority of the Bank’s security interest in the Collateral; 

8.4 Attachment; Levy; Restraint on Business. 

(a) (i) The service of process seeking to attach, by trustee or similar process, any funds of Borrower or of any entity under the control of
Borrower (including any Subsidiary or Borrower-owned Related Special Purpose Entity) on deposit or otherwise maintained with Bank or any Bank Affiliate, or (ii) a notice of lien or levy is filed against any of Borrower’s assets by any
government agency, and the same under subclauses (i) and (ii) hereof are not, within ten (10) days after the occurrence thereof, discharged or stayed (whether through the posting of a bond or otherwise); provided, however, no Credit
Extensions shall be made during any ten (10) day cure period; or 
 (b) (i) any material portion of Borrower’s assets is attached,
seized, levied on, or comes into possession of a trustee or receiver, or (ii) any court order enjoins, restrains, or prevents Borrower from conducting any material part of its business; 

8.5 Insolvency. (a) Borrower fails to be solvent as described in Section 5.5 hereof; (b) Borrower begins an Insolvency
Proceeding; or (c) an Insolvency Proceeding is begun against Borrower and not dismissed or stayed within forty-five (45) days (but no Credit Extensions shall be made while of any of the conditions described in clause (a) exist and/or
until any Insolvency Proceeding is dismissed); 
 8.6 Other Agreements. There is, under any agreement to which Borrower is a party
with a third party or parties, (a) any default resulting in a right by such third party or parties, whether or not exercised, to accelerate the maturity of any Indebtedness in an amount individually or in the aggregate in excess of Fifty
Thousand Dollars ($50,000); or (b) any default by Borrower, the result of which could have a material adverse effect on Borrower’s business; 

8.7 Judgments. One or more final judgments, orders, or decrees for the payment of money in an amount, individually or in the aggregate,
of at least Fifty Thousand Dollars ($50,000) (not covered by independent third-party insurance as to which liability has been accepted by such insurance earner, subject to standard deductibles) shall be rendered against Borrower and the same are
not, within ten (10) days after the entry thereof, discharged or execution thereof stayed or bonded pending appeal, or such judgments are not discharged prior to the expiration of any such stay (provided that no Credit Extensions will be made
prior to the discharge, stay, or bonding of such judgment, order, or decree); 
 8.8 Misrepresentations. Borrower or any Person
acting for Borrower makes any representation, warranty or other statement now or later in this Agreement, any Loan Document 

  
 18 

 
or in any writing delivered to Bank or to induce Bank to enter this Agreement or any Loan Document, and such representation, warranty, or other statement is incorrect in any material respect when
made; 
 8.9 Subordinated Debt. A default or breach occurs under any agreement between Borrower and any creditor of Borrower that
signed a subordination, intercreditor, or other similar agreement with Bank, or any creditor that has signed such an agreement with Bank breaches any terms of such agreement (notwithstanding the foregoing, in the case of agreements between Borrower
and BioMed, this Section 8.9 shall apply only to breaches occurring under documents evidencing or securing Indebtedness of Borrower to BioMed); 

8.10 RSPE Loan Amount; Proceeds from Related Special Purpose Entities. Any RSPE Loan shall (x) exceed the Individual RSPE Note
Threshold applicable to such RSPE Loan, or (y) exceed, when taken together with all other RSPE Loans, the Maximum Aggregate RSPE Loan Amount; or any Related Special Purpose Entity shall fail to pay to Borrower an amount equal to or greater than
eighty-five percent (85%) of the RSPE Loan made by Borrower to such Related Special Purpose Entity within ninety (90) days following the funding of such RSPE Loan; or 

8.11 Governmental Approvals. Any Governmental Approval shall have been (a) revoked, rescinded, suspended, modified in an adverse
manner or not renewed in the ordinary course for a full term or (b) subject to any decision by a Governmental Authority that designates a hearing with respect to any applications for renewal of any of such Governmental Approval or that could
result in the Governmental Authority taking any of the actions described in clause (a) above, and such decision or such revocation, rescission, suspension, modification or non-renewal (i) has, or could reasonably be expected to have, a
Material Adverse Change, or (ii) adversely affects the legal qualifications of Borrower or any of its Subsidiaries to hold such Governmental Approval in any applicable jurisdiction and such revocation, rescission, suspension, modification or
non-renewal could reasonably be expected to affect the status of or legal qualifications of Borrower or any of its Subsidiaries to hold any Governmental Approval in any other jurisdiction. Notwithstanding the foregoing, failure of one or more
clinical trials in respect of a drug discovery program shall not, in and of itself, be deemed to constitute an Event of Default under this Section 8.10. 
  

	9	BANK’S RIGHTS AND REMEDIES 

 9.1 Rights and Remedies. While an Event of
Default occurs and continues Bank may, without notice or demand, do any or all of the following: 
 (a) declare all Obligations immediately
due and payable (but if an Event of Default described in Section 8.5 occurs all Obligations are immediately due and payable without any action by Bank); 

(b) stop advancing money or extending credit for Borrower’s benefit under this Agreement or under any other agreement between Borrower
and Bank; 

  
 19 

 (c) for any Letters of Credit, demand that Borrower (i) deposit cash with Bank in an amount
equal to 105% (110% for Letters of Credit denominated in a Foreign Currency) of the Dollar Equivalent of the aggregate face amount of all Letters of Credit remaining undrawn (plus all interest, fees, and costs due or to become due in connection
therewith (as estimated by Bank in its good faith business judgment)), to secure all of the Obligations relating to such Letters of Credit, as collateral security for the repayment of any future drawings under such Letters of Credit, and Borrower
shall forthwith deposit and pay such amounts, and (ii) pay in advance all letter of credit fees scheduled to be paid or payable over the remaining term of any Letters of Credit; 

(d) terminate any FX Contracts; 

(e) settle or adjust disputes and claims directly with Account Debtors for amounts on terms and in any order that Bank considers advisable,
notify any Person owing Borrower money of Bank’s security interest in such funds, and verify the amount of such account; 
 (f) make
any payments and do any acts it considers necessary or reasonable to protect the Collateral and/or its security interest in the Collateral. Borrower shall assemble the Collateral if Bank requests and make it available as Bank designates. Bank may
enter premises where the Collateral is located, take and maintain possession of any part of the Collateral, and pay, purchase, contest, or compromise any Lien that appears to be prior or superior to its security interest and pay all expenses
incurred. Borrower grants Bank a license to enter and occupy any of its premises, without charge, to exercise any of Bank’s rights or remedies; 

(g) apply to the Obligations (i) any balances and deposits of Borrower it holds, or (ii) any amount held by Bank owing to or for the
credit or the account of Borrower; 
 (h) ship, reclaim, recover, store, finish, maintain, repair, prepare for sale, advertise for sale and
sell the Collateral. Bank is hereby granted a non-exclusive, royalty-free license or other right to use, without charge, Borrower’s labels, Patents, Copyrights, mask works, rights of use of any name, trade secrets, trade names, Trademarks, and
advertising matter, or any similar property as it pertains to the Collateral, in completing production of, advertising for sale, and selling any Collateral and, in connection with Bank’s exercise of its rights under this Section,
Borrower’s rights under all licenses and all franchise agreements inure to Bank’s benefit; 
 (i) place a “hold’’
on any account maintained with Bank and/or deliver a notice of exclusive control, any entitlement order, or other directions or instructions pursuant to any Control Agreement or similar agreements providing control of any Collateral; 

(j) demand and receive possession of Borrower’s Books; and 

(k) exercise all rights and remedies available to Bank under the Loan Documents or at law or equity, including all remedies provided under the
Code (including disposal of the Collateral pursuant to the terms thereof). 

  
 20 

 9.2 Power of Attorney. Borrower hereby irrevocably appoints Bank as its lawful
attorney-in-fact, exercisable upon the occurrence and during the continuance of an Event of Default, to: (a) endorse Borrower’s name on any checks or other forms of payment or security; (b) sign Borrower’s name on any invoice or
bill of lading for any Account or drafts against Account Debtors; (c) settle and adjust disputes and claims about the Accounts directly with Account Debtors, for amounts and on terms Bank determines reasonable; (d) make, settle, and adjust
all claims under Borrower’s insurance policies; (e) pay, contest or settle any Lien, charge, encumbrance, security interest, and adverse claim in or to the Collateral, or any judgment based thereon, or otherwise take any action to
terminate or discharge the same; and (f) transfer the Collateral into the name of Bank or a third party as the Code permits. Borrower hereby appoints Bank as its lawful attorney-in-fact to sign Borrower’s name on any documents necessary to
perfect or continue the perfection of Bank’s security interest in the Collateral, regardless of whether an Event of Default has occurred, until all Obligations (other than inchoate indemnity obligations) have been satisfied in full and Bank is
under no further obligation to make Credit Extensions hereunder. Bank’s foregoing appointment as Borrower’s attorney in fact, and all of Bank’s rights and powers, coupled with an interest, are irrevocable until all Obligations (other
than inchoate indemnity obligations) have been fully repaid and performed and Bank’s obligation to provide Credit Extensions terminates. 

9.3 Protective Payments. If Borrower fails to obtain the insurance called for by Section 6.5 or fails to pay any premium thereon
or fails to pay any other amount which Borrower is obligated to pay under this Agreement or any other Loan Document, Bank may obtain such insurance or make such payment, and all amounts so paid by Bank are Bank Expenses and immediately due and
payable, bearing interest at the then highest rate applicable to the Obligations, and secured by the Collateral. Bank will make reasonable efforts to provide Borrower with notice of Bank obtaining such insurance at the time it is obtained or within
a reasonable time thereafter. No payments by Bank are deemed an agreement to make similar payments in the future or Bank’s waiver of any Event of Default. 

9.4 Application of Payments and Proceeds Upon Default. If an Event of Default has occurred and is continuing, Bank may apply any funds
in its possession, whether from Borrower account balances, payments, proceeds realized as the result of any collection of Accounts or other disposition of the Collateral, or otherwise, to the Obligations in such order as Bank shall determine in its
sole discretion, Any surplus shall be paid to Borrower or other Persons legally entitled thereto; Borrower shall remain liable to Bank for any deficiency. If Bank, in its good faith business judgment, directly or indirectly enters into a deferred
payment or other credit transaction with any purchaser at any sale of Collateral, Bank shall have the option, exercisable at any time, of either reducing the Obligations by the principal amount of the purchase price or deferring the reduction of the
Obligations until the actual receipt by Bank of cash therefor. 
 9.5 Bank’s Liability for Collateral. So long as Bank complies
with reasonable banking practices regarding the safekeeping of the Collateral in the possession or under the control of Bank, Bank shall not be liable or responsible for: (a) the safekeeping of the Collateral; (b) any loss or damage to the
Collateral; (c) any diminution in the value of the Collateral; or (d) any act or default of any carrier, warehouseman, bailee, or other Person. Borrower bears all risk of loss, damage or destruction of the Collateral. 

  
 21 

 9.6 No Waiver; Remedies Cumulative. Bank’s failure, at any time or times, to require
strict performance by Borrower of any provision of this Agreement or any other Loan Document shall not waive, affect, or diminish any right of Bank thereafter to demand strict performance and compliance herewith or therewith. No waiver hereunder
shall be effective unless signed by the party granting the waiver and then is only effective for the specific instance and purpose for which it is given. Bank’s rights and remedies under this Agreement and the other Loan Documents are
cumulative. Bank has all rights and remedies provided under the Code, by law, or in equity. Bank’s exercise of one right or remedy is not an election and shall not preclude Bank from exercising any other remedy under this Agreement or other
remedy available at law or in equity, and Bank’s waiver of any Event of Default is not a continuing waiver. Bank’s delay in exercising any remedy is not a waiver, election, or acquiescence. 

9.7 Demand Waiver. Borrower waives demand, notice of default or dishonor, notice of payment and nonpayment, notice of any default,
nonpayment at maturity, release, compromise, settlement, extension, or renewal of accounts, documents, instruments, chattel paper, and guarantees held by Bank on which Borrower is liable. 

 

	10	NOTICES 

 All notices, consents, requests, approvals, demands, or other communication by
any party to this Agreement or any other Loan Document must be in writing and shall be deemed to have been validly served, given, or delivered: (a) upon the earlier of actual receipt and three (3) Business Days after deposit in the U.S.
mail, first class, registered or certified mail return receipt requested, with proper postage prepaid; (b) upon transmission, when sent by electronic mail or facsimile transmission; (c) one (1) Business Day after deposit with a
reputable overnight courier with all charges prepaid; or (d) when delivered, if hand-delivered by messenger, all of which shall be addressed to the party to be notified and sent to the address, facsimile number, or email address indicated
below. Bank or Borrower may change its mailing or electronic mail address or facsimile number by giving the other party written notice thereof in accordance with the terms of this Section 10. 

 

							
	                        If to Borrower:	  	aTyr Pharma, Inc.	  		  	
		  	3565 General Atomics Court #103	  		  	
		  	San Diego, CA 92121	  		  	
		  	Attn: Stan Blackburn, Acting CFO	  		  	
		  	Fax:
                                        
	  		  	
		  	Email: 	  		  	
	                        If to Bank:	  	Silicon Valley Bank	  		  	
		  	4370 La Jolla village Drive, Suite 860	  		  	
		  	San Diego, CA 92122	  		  	
		  	Attn: Kevin Wallace	  		  	
		  	Fax:                                     
    	  		  	
		  	Email: 	  		  	

  

	11	CHOICE OF LAW, VENUE, JURY TRIAL WAIVER AND JUDICIAL REFERENCE 

  
 22 

 California law governs the Loan Documents without regard to principles of conflicts of law.
Borrower and Bank each submit to the exclusive jurisdiction of the State and Federal courts in Santa Clara County, California; provided however, that nothing in this Agreement shall be deemed to operate to preclude Bank from bringing suit or taking
other legal action in any other jurisdiction to realize on the Collateral or any other security for the Obligations, or to enforce a judgment or other court order in favor of Bank. Borrower expressly submits and consents in advance to such
jurisdiction in any action or suit commenced in any such court, and Borrower hereby waives any objection that it may have based upon lack of personal jurisdiction, improper venue, or forum non conveniens and hereby consents to the granting of such
legal or equitable relief as is deemed appropriate by such court. Borrower hereby waives personal service of the summons, complaints, and other process issued in such action or suit and agrees that service of such summons, complaints, and other
process may be made by registered or certified mail addressed to Borrower at the address set forth in Section 10, or subsequently provided by Borrower in accordance with, Section 10 of this Agreement and that service so made shall be
deemed completed upon the earlier to occur of Borrower’s actual receipt thereof or three (3) days after deposit in the U.S. mails, proper postage prepaid. 

TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, BORROWER AND BANK EACH WAIVE THEIR RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF
ACTION ARISING OUT OF OR BASED UPON THIS AGREEMENT, THE LOAN DOCUMENTS OR ANY CONTEMPLATED TRANSACTION, INCLUDING CONTRACT, TORT, BREACH OF DUTY AND ALL OTHER CLAIMS. THIS WAIVER IS A MATERIAL INDUCEMENT FOR BOTH PARTIES TO ENTER INTO THIS
AGREEMENT. EACH PARTY HAS REVIEWED THIS WAIVER WITH ITS COUNSEL. 
 WITHOUT INTENDING IN ANY WAY TO LIMIT THE PARTIES’ AGREEMENT TO
WAIVE THEIR RESPECTIVE RIGHT TO A TRIAL BY JURY, if the above waiver of the right to a trial by jury is not enforceable, the parties hereto agree that any and all disputes or controversies of any nature between them arising at any time shall be
decided by a reference to a private judge, mutually selected by the parties (or, if they cannot agree, by the Presiding Judge of the Santa Clara County, California Superior Court) appointed in accordance with California Code of Civil Procedure
Section 638 (or pursuant to comparable provisions of federal law if the dispute falls within the exclusive jurisdiction of the federal courts), sitting without a jury, in Santa Clara County, California; and the parties hereby submit to the
jurisdiction of such court. The reference proceedings shall be conducted pursuant to and in accordance with the provisions of California Code of Civil Procedure §§ 638 through 645.1, inclusive. The private judge shall have the power, among
others, to grant provisional relief, including without limitation, entering temporary restraining orders, issuing preliminary and permanent injunctions and appointing receivers. All such proceedings shall be closed to the public and confidential and
all records relating thereto shall be permanently sealed. If during the course of any dispute, a party desires to seek provisional relief, but a judge has not been appointed at that point pursuant to the judicial reference procedures, then such
party may apply to the Santa Clara County, California Superior Court for such relief. The proceeding before the private judge shall be conducted in the same manner as it would be before a court under the rules of evidence applicable to judicial
proceedings. The parties shall be entitled to discovery which shall be conducted in the same manner as it would be before a court under the rules of discovery applicable to judicial 

  
 23 

 
proceedings. The private judge shall oversee discovery and may enforce all discovery rules and orders applicable to judicial proceedings in the same manner as a trial court judge. The parties
agree that the selected or appointed private judge shall have the power to decide all issues in the action or proceeding, whether of fact or of law, and shall report a statement of decision thereon pursuant to California Code of Civil Procedure
§ 644(a). Nothing in this paragraph shall limit the right of any party at any time to exercise self-help remedies, foreclose against collateral, or obtain provisional remedies. The private judge shall also determine all issues relating to the
applicability, interpretation, and enforceability of this paragraph. 
  

	12	GENERAL PROVISIONS 

 12.1 Successors and Assigns. This Agreement binds and is for
the benefit of the successors and permitted assigns of each party. Borrower may not assign this Agreement or any rights or obligations under it without Bank’s prior written consent (which may be granted or withheld in Bank’s discretion).
Bank has the right, without the consent of or notice to Borrower, to sell, transfer, assign, negotiate, or grant participation in all or any part of, or any interest in, Bank’s obligations, rights, and benefits under this Agreement and the
other Loan Documents. Notwithstanding the foregoing, unless an Event of Default has occurred and is continuing, Bank shall not assign any interest in the Loan Documents to an operating company which is a direct competitor of Borrower. 

12.2 Indemnification. Borrower agrees to indemnify, defend and hold Bank and its directors, officers, employees, agents, attorneys, or
any other Person affiliated with or representing Bank (each, an “Indemnified Person”) harmless against: (a) all obligations, demands, claims, and liabilities (collectively, “Claims”) claimed or asserted by any
other party in connection with the transactions contemplated by the Loan Documents; and (b) all losses or expenses (including Bank Expenses) in any way suffered, incurred, or paid by such Indemnified Person as a result of, following from,
consequential to, or arising from transactions between Bank and Borrower (including reasonable attorneys’ fees and expenses), except for Claims and/or losses directly caused by such Indemnified Person’s gross negligence or willful
misconduct. 
 12.3 Time of Essence. Time is of the essence for the performance of all Obligations in this Agreement. 

12.4 Severability of Provisions. Each provision of this Agreement is severable from every other provision in determining the
enforceability of any provision. 
 12.5 Correction of Loan Documents. Bank may correct patent errors and fill in any blanks in this
Agreement and the other Loan Documents consistent with the agreement of the parties. 
 12.6 Amendments in Writing; Waiver;
Integration. No purported amendment or modification of any Loan Document, or waiver, discharge or termination of any obligation under any Loan Document, shall be enforceable or admissible unless, and only to the extent, expressly set forth in a
writing signed by the party against which enforcement or admission is sought. Without limiting the generality of the foregoing, no oral promise or statement, nor any action, 

  
 24 

 
inaction, delay, failure to require performance or course of conduct shall operate as, or evidence, an amendment, supplement or waiver or have any other’ effect on any Loan Document. Any
waiver granted shall be limited to the specific circumstance expressly described in it, and shall not apply to any subsequent or other circumstance, whether similar or dissimilar, or give rise to, or evidence, any obligation or commitment to grant
any further waiver. The Loan Documents represent the entire agreement about this subject matter and supersede prior negotiations or agreements. All prior agreements, understandings, representations, warranties, and negotiations between the parties
about the subject matter of the Loan Documents merge into the Loan Documents. 
 12.7 Counterparts. This Agreement may be executed in
any number of counterparts and by different parties on separate counterparts, each of which, when executed and delivered, is an original, and all taken together, constitute one Agreement. 

12.8 Survival. All covenants, representations and warranties made in this Agreement continue in full force until (i) all
Obligations (other than inchoate indemnity obligations and any other obligations which, by their terms, are to survive the termination of this Agreement) have been paid in full and satisfied and (ii) Bank has no further commitment to make
Credit’ Extensions. Without limiting the foregoing, except as otherwise provided in Section 4.1, the grant of security interest by Borrower in Section 4.1 shall survive until the termination of all Bank Services Agreements. The
obligation of Borrower in Section 12.2 to indemnify Bank shall survive until the statute of limitations with respect to such claim or cause of action shall have ran. 

12.9 Confidentiality. In handling any confidential information, Bank shall exercise the same degree of care that it exercises for its
own proprietary information, but disclosure of information may be made: (a) to Bank’s Subsidiaries or Affiliates (such Subsidiaries and Affiliates, together with Bank, collectively, “Bank Entities”); (b) to
prospective transferees or purchasers of any interest in the Credit Extensions (provided, however, Bank shall use its best efforts to obtain any prospective transferee’s or purchaser’s agreement to the terms of this provision); (c) as
required by law, regulation, subpoena, or other order; (d) to Bank’s regulators or as otherwise required in connection with Bank’s examination or audit; (e) as Bank considers appropriate in exercising remedies under the Loan
Documents; and (1) to third-party service providers of Bank so long as such service providers have executed a confidentiality agreement with Bank with terms no less restrictive than those contained herein. Confidential information does not
include information that is either: (i) in the public domain or in Bank’s possession when disclosed to Bank, or becomes part of the public domain after disclosure to Bank; or (ii) disclosed to Bank by a third party if Bank does not
know that the third party is prohibited from disclosing the information. 
 Bank Entities may use the confidential information for reporting
purposes and the development and distribution of databases and market analyses so long as such confidential information is aggregated and anonymized prior to distribution unless otherwise expressly prohibited by Borrower. The provisions of the
immediately preceding sentence shall survive the termination of this Agreement. 

  
 25 

 12.10 Attorneys’ Fees, Costs and Expenses. In any action or proceeding between
Borrower and Bank arising out of or relating to the Loan Documents, the prevailing party shall be entitled to recover its reasonable attorneys’ fees and other costs and expenses incurred, in addition to any other relief to which it may be
entitled, 
 12.11 Electronic Execution of Documents. The words “execution,” “signed,’’
“signature” and words of like import in any Loan Document shall be deemed to include electronic signatures or the keeping of records in electronic form, each of which shall be of the same legal effect, validity and enforceability as a
manually executed signature or the use of a paper-based recordkeeping systems, as the case may be, to the extent and as provided for in any applicable law, including, without limitation, any state law based on the Uniform Electronic Transactions
Act. 
 12.12 Captions. The headings used in this Agreement are for convenience only and shall not affect the interpretation of this
Agreement. 
 12.13 Construction of Agreement. The parties mutually acknowledge that they and their attorneys have participated in
the preparation and negotiation of this Agreement. In cases of uncertainty this Agreement shall be construed without regard to which of the parties caused the uncertainty to exist. 

12.14 Relationship. The relationship of the parties to this Agreement is determined solely by the provisions of this Agreement. The
parties do not intend to create any agency, partnership, joint venture, trust, fiduciary or other relationship with duties or incidents different from those of parties to an arm’s-length contract. 

12.15 Third Parties. Nothing in this Agreement, whether express or implied, is intended to: (a) confer any benefits, rights or
remedies under or by reason of this Agreement on any persons other than the express parties to it and their respective permitted successors and assigns; (b) relieve or discharge the obligation or liability of any person not an express party to
this Agreement; or (c) give any person not an express party to this Agreement any right of subrogation or action against any party to this Agreement. 
  

	13	DEFINITIONS 

 13.1 Definitions. As used in the Loan Documents, the word
“shall” is mandatory, the word “may” is permissive, the word “or” is not exclusive, the words “includes” and “including” are not limiting, the singular includes the plural, and numbers denoting
amounts that are set off in brackets are negative. As used in this Agreement, the following capitalized terms have the following meanings: 

“Account” is any “account” as defined in the Code with such additions to such term as may hereafter be made,
and includes, without limitation, all accounts receivable and other sums owing to Borrower. 
 “Account
Debtor” is any “account debtor” as defined in the Code with such additions to such term as may hereafter be made. 

  
 26 

 “Affiliate” is, with respect to any Person, each other Person that owns
or controls directly or indirectly the Person, any Person that controls or is controlled by or is under common control with the Person, and each of that Person’s senior executive officers, directors, partners and, for any Person that is a
limited liability company, that Person’s managers and members. 
 “Agreement” is defined in the preamble
hereof. 
 “Bank” is defined in the preamble hereof. 

“Bank Entities” is defined in Section 12.9. 

“Bank Expenses” are all audit fees and expenses, costs, and expenses (including reasonable attorneys’ fees and
expenses) for preparing, amending, negotiating, administering, defending and enforcing the Loan Documents (including, without limitation, those incurred in connection with appeals or Insolvency Proceedings and those identified as Bank Expenses in
Section 9.3 hereof) or otherwise incurred by Bank with respect to Borrower. 
 “Bank Services” are any
products, credit services, and/or financial accommodations previously, now, or hereafter provided to Borrower or any of its Subsidiaries by Bank or any Bank Affiliate, including, without limitation, any letters of credit, cash management services
(including, without limitation, merchant services, direct deposit of payroll, business credit cards, and check cashing services), interest rate swap arrangements, and foreign exchange services as any such products or services may be identified in
Bank’s various agreements related thereto (each, a “Bank Services Agreement”). 
 “Basic
Rate” is the per annum rate of interest (based on a year of 360 days) equal to the sum of U.S. Treasury note yield to maturity for a term equal to three (3) years as reported in the Federal Reserve Statistical Release H.15-Selected
Interest Rates under the heading “U.S. Government Securities/Treasury Constant Maturities” on the Funding Date. (In the event Release H.15 is no longer published, Bank shall select a comparable publication to determine the U.S. Treasury
note yield to maturity.) 
 “BioMed” is defined in Section 3.1. 

“Borrower” is defined in the preamble hereof. 

“Borrower’s Books” are all Borrower’s books and records including ledgers, federal and state tax returns,
records regarding Borrower’s assets or liabilities, the Collateral, business operations or financial condition, and all computer programs or storage or any equipment containing such information. 

“Borrowing Resolutions” are, with respect to any Person, those resolutions substantially in the form attached hereto
as Exhibit C. 
 “Business Day” is any day that is not a Saturday, Sunday or a day on which Bank
is closed. 

  
 27 

 “Cash Equivalents” means (a) marketable direct obligations issued or
unconditionally guaranteed by the United States or any agency or any State thereof having maturities of not more than one (1) year from the date of acquisition; (b) commercial paper maturing no more than one (1) year after its
creation and having the highest rating from either Standard & Poor’s Ratings Group or Moody’s Investors Service, Inc.; and (c) Bank’s certificates of deposit issued maturing no more than one (1) year after issue.

 “Code” is the Uniform Commercial Code, as the same may, from time to time, be enacted and in effect in the
State of California; provided, that, to the extent that the Code is used to define any term herein or in any Loan Document and such term is defined differently in different Articles or Divisions of the Code, the definition of such term contained in
Article or Division 9 shall govern; provided further, that in the event that, by reason of mandatory provisions of law, any or all of the attachment, perfection, or priority of, or remedies with respect to, Bank’s Lien on any Collateral is
governed by the Uniform Commercial Code in effect in a jurisdiction other than the State of California, the term “Code” shall mean the Uniform Commercial Code as enacted and in effect in such other jurisdiction solely for purposes of the
provisions thereof relating to such attachment, perfection, priority, or remedies and for purposes of definitions relating to such provisions. 

“Collateral” is any and all properties, rights and assets of Borrower described on Exhibit A. 

“Collateral Account” is any Deposit Account, Securities Account, or Commodity Account. 

“Commodity Account” is any “commodity account” as defined in the Code with such additions to such term as
may hereafter be made. 
 “Common Control” means, with respect to a Related Special Purpose Entity, that such
Related Special Purpose Entity is majority-owned by the individuals and/or entities holding a majority in interest in the ownership of Borrower, and that such individuals and/or entities have the ability to elect a majority of the board of directors
(or similar governing body) of such Related Special Purpose Entity, and such board of directors (or similar governing body) has the power to make all decisions and determinations with respect to the repayment and performance by such Related Special
Purpose Entity of its RSPE Loan from Borrower and of its obligations and duties with respect to any license granted to it by Borrower for the use of Borrower’s Intellectual Property. 

“Compliance Certificate” is that certain certificate in the form attached hereto as Exhibit D. 

“Consolidated Cash” means cash and Cash Equivalents of Borrower, its Subsidiaries and the Related Special Purpose
Entities, on a combined basis. 
 “Contingent Obligation” is, for any Person, any direct or indirect
liability, contingent or not, of that Person for (a) any indebtedness, lease, dividend, letter of credit or other obligation of another such as an obligation, in each case, directly or indirectly guaranteed, endorsed, co-made, discounted or
sold with recourse by that Person, or for which that Person is directly or indirectly  

  
 28 

 
liable; (b) any obligations for undrawn letters of credit for the account of that Person; and (c) all obligations from any interest rate, currency or commodity swap agreement, interest
rate cap or collar agreement, or other agreement or arrangement designated to protect a Person against fluctuation in interest rates, currency exchange rates or commodity prices; but “Contingent Obligation” does not include endorsements in
the ordinary course of business. The amount of a Contingent Obligation is the stated or determined amount of the primary obligation for which the Contingent Obligation is made or, if not determinable, the maximum reasonably anticipated liability for
it determined by the Person in good faith; but the amount may not exceed the maximum of the obligations under any guarantee or other support arrangement. 

“Control Agreement” is any control agreement entered into among the depository institution at which Borrower maintains
a Deposit Account or the securities intermediary or commodity intermediary at which Borrower maintains a Securities Account or a Commodity Account, Borrower, and Bank pursuant to which Bank obtains control (within the meaning of the Code) over such
Deposit Account, Securities Account, or Commodity Account. 
 “Conversion Date” is defined in Section
2.1.1(b)(ii). 
 “Copyrights” are any and all copyright rights, copyright applications, copyright
registrations and like protections in each work or authorship and derivative work thereof, whether published or unpublished and whether or not the same also constitutes a trade secret. 

“Credit Extension” is any Growth Capital Advance or any other extension of credit by Bank for Borrower’s benefit
under this Agreement. 
 “Deposit Account” is any “deposit account” as defined in the Code with
such additions to such term as may hereafter be made. 
 “Designated Deposit Account” is Borrower’s
deposit account, account number                     , maintained with Bank. 

“Dollars,” “dollars” or use of the sign “$” means only lawful money of
the United States and not any other currency, regardless of whether that currency uses the “$” sign to denote its currency or may be readily converted into lawful money of the United States. 

“Dollar Equivalent” is, at any time, (a) with respect to any amount denominated in Dollars, such amount, and
(b) with respect to any amount denominated in a Foreign Currency, the equivalent amount therefor in Dollars as determined by Bank at such time on the basis of the then-prevailing rate of exchange in San Francisco, California, for sales of the
Foreign Currency for transfer to the country issuing such Foreign Currency. 
 “Effective Date” is defined in
the preamble hereof. 
 “Equipment” is all “equipment” as defined in the Code with such additions
to such term as may hereafter be made, and includes without limitation all machinery, fixtures, goods, vehicles (including motor vehicles and trailers), and any interest in any of the foregoing. 

“ERISA” is the Employee Retirement Income Security Act of 1974, and its regulations. 

  
 29 

 “Event of Default” is defined in Section 8. 

“Exchange Act” is the Securities Exchange Act of 1934, as amended. 

“Final Payment” is a payment (in addition to and not a substitution for the regular monthly payments of principal plus
accrued interest) due in accordance with Section 2.1.1 above, equal to the original principal amount of the applicable Growth Capital Advance multiplied by the Final Payment Percentage. 

“Final Payment Percentage” is three percent (3.0%). 

“Foreign Currency” means lawful money of a country other than the United States. 

“Funding Date” is any date on which a Credit Extension is made to or for the account of Borrower, which shall be a
Business Day. 
 “FX Contract” is any foreign exchange contract by and between Borrower and Bank under which
Borrower commits to purchase from or sell to Bank a specific amount of Foreign Currency on a specified date. 

“GAAP” is generally accepted accounting principles set forth in the opinions and pronouncements of the Accounting Principles
Board of the American Institute of Certified Public Accountants and statements and pronouncements of the Financial Accounting Standards Board or in such other statements by such other Person as may be approved by a significant segment of the
accounting profession, that are applicable to the circumstances as of the date of determination. 
 “General
Intangibles” is all “general intangibles” as defined in the Code in effect on the date hereof with such additions to such term as may hereafter be made, and includes without limitation, all Intellectual Property, claims, income
and other tax refunds, security and other deposits, payment intangibles, contract rights, options to purchase or sell real or personal property, rights in all litigation presently or hereafter pending (whether in contract, tort or otherwise),
insurance policies (including without limitation key man, property damage, and business interruption insurance), payments of insurance and rights to payment of any kind. 

“Governmental Approval” is any consent, authorization, approval, order, license, franchise, permit, certificate,
accreditation, registration, filing or notice, of, issued by, from or to, or other act by or in respect of, any Governmental Authority. 

“Governmental Authority” is any nation or government, any state or other political subdivision thereof, any agency,
authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative functions of or pertaining to government, any securities exchange and any
self-regulatory organization. 
 “Growth Capital Advance” is defined in Section 2.1.1(a). 

“Growth Capital Loan Commitment” is Two Million Five Hundred Thousand Dollars ($2,500,000). 

  
 30 

 “Growth Capital Maturity Date” is December 1, 2015. 

“Indebtedness” is (a) indebtedness for borrowed money or the deferred price of property or services, such as
reimbursement and other obligations for surety bonds and letters of credit, (b) obligations evidenced by notes, bonds, debentures or similar instruments, (c) capital lease obligations, and (d) Contingent Obligations. 

“Indemnified Person” is defined in Section 12.2. 

“Individual RSPE Note Threshold” is, with respect to each Related Special Purpose Entity, an amount equal to the
product of (i) 1.1765, multiplied by (ii) the aggregate amount contracted to be paid to Borrower by such Related Special Purpose Entity in connection with research and development activities in the ninety (90) day period
commencing on the funding date of the applicable RSPE Loan; provided, however, that with respect to each Related Special Purpose Entity, prior to, or in connection with, such Related Special Purpose Entity ceasing to be under Common Control with
Borrower, such Related Special Purpose Entity shall have paid to Borrower an aggregate amount equal to or greater than the aggregate principal amount of the RSPE Loan made by Borrower to such Related Special Purpose Entity; provided further than no
new loans may be made by Borrower to a Related Special Purpose Entity which is neither Borrower-owned or under Common Control with Borrower. 

“Insolvency Proceeding” is any proceeding by or against any Person under the United States Bankruptcy Code, or any
other bankruptcy or insolvency law, including assignments for the benefit of creditors, compositions, extensions generally with its creditors, or proceedings seeking reorganization, arrangement, or other relief. 

“Intellectual Property” means all of Borrower’s right, title, and interest in and to the following: 

(a) its Copyrights, Trademarks and Patents; 

(b) any and all trade secrets and trade secret rights, including, without limitation, any rights to unpatented inventions, know-how, operating
manuals; 
 (c) any and all source code; 

(d) any and all design rights which may be available to Borrower; 

(e) any and all claims for damages by way of past, present and future infringement of any of the foregoing, with the right, but not the
obligation, to sue for and collect such damages for said use or infringement of the Intellectual Property rights identified above; and 

(f) all amendments, renewals and extensions of any of the Copyrights, Trademarks or Patents. 

“Interest-Only Period” means the period commencing on the first (1st) Business Day following a Funding Date and
continuing through December 31, 2012. 

  
 31 

 “Inventory” is all “inventory” as defined in the Code in effect
on the date hereof with such additions to such term as may hereafter be made, and includes without limitation all merchandise, raw materials, parts, supplies, packing and shipping materials, work in process and finished products, including without
limitation such inventory as is temporarily out of Borrower’s custody or possession or in transit and including any returned goods and any documents of title representing any of the above. 

“Investment” is any beneficial ownership interest in any Person (including stock, partnership interest or other
securities), and any loan, advance or capital contribution to any Person. For clarification, payment by Borrower of the ordinary course operating expenses of Pangu, and payments made by Borrower to Pangu for services rendered shall not be deemed to
be “Investments.” 
 “Letter of Credit” is a standby or commercial letter of credit issued by Bank
upon request of Borrower based upon an application, guarantee, indemnity, or similar agreement. 
 “Lien” is
a claim, mortgage, deed of trust, levy, charge, pledge, security interest or other encumbrance of any kind, whether voluntarily incurred or arising by operation of law or otherwise against any property. 

“Loan Documents” are, collectively, this Agreement the Perfection Certificate, any Bank Services Agreement, any
subordination agreement, any note, or notes or guaranties executed by Borrower, and any other present or future agreement between Borrower and/or for the benefit of Bank, all as amended, restated, or otherwise modified. 

“Material Adverse Change” is (a) a material impairment in the perfection or priority of Bank’s Lien in the
Collateral or in the value of such Collateral; (b) a material adverse change in the business, operations, or condition (financial or otherwise) of Borrower; or (c) a material impairment of the prospect of repayment of any portion of the
Obligations. 
 “Maximum Aggregate RSPE Loan Amount” is Two Million Dollars ($2,000,000) per fiscal quarter
of Borrower. 
 “Obligations” are Borrower’s obligation to pay when due any debts, principal, interest,
Bank Expenses, and other amounts Borrower owes Bank now or later, whether under this Agreement, the other Loan Documents, or otherwise, including, without limitation, any interest accruing after Insolvency Proceedings begin and debts, liabilities,
or obligations of Borrower assigned to Bank, and the performance of Borrower’s duties under the Loan Documents. 

“Operating Documents” are, for any Person, such Person’s formation documents, as certified with the Secretary of
State of such Person’s state of formation, and, (a) if such Person is a corporation, its bylaws in current form, (b) if such Person is a limited liability company, its limited liability company agreement (or similar agreement), and
(c) if such Person is a partnership, its partnership agreement (or similar agreement), each of the foregoing with all current amendments or modifications thereto. 

“Pangu” means Pangu Biopharma Limited, a company formed under the laws of Hong Kong. 

  
 32 

 “Patents” means all patents, patent applications and like protections
including without limitation improvements, divisions, continuations, renewals, reissues, extensions and continuations-in-part of the same. 

“Payment/Advance Form” is that certain form attached hereto as Exhibit B. 

“Perfection Certificate” is defined in Section 5.1. 

“Permitted Indebtedness” is: 

(a) Borrower’s Indebtedness to Bank under this Agreement and the other Loan Documents; 

(b) Indebtedness existing on the Effective Date and shown on the Perfection Certificate; 

(c) Subordinated Debt, including without limitation, the loan from BioMed pursuant to that certain subordinated convertible Promissory Note
issued by Borrower to BioMed, dated December 22, 2011; 
 (d) unsecured Indebtedness to trade creditors incurred in the ordinary course
of business; 
 (e) Indebtedness incurred as a result of endorsing negotiable instruments received in the ordinary course of business; 

(f) Indebtedness in an aggregate principal amount not to exceed Two Hundred Fifty Thousand Dollars ($250,000) secured by Permitted Liens
specified in clause (c) of the definition of Permitted Liens; 
 (g) Indebtedness of Subsidiaries to other Subsidiaries, and
Indebtedness of Subsidiaries and Related Special Purpose Entities to Borrower constituting Permitted Investments under clauses (f) and (i) of the definition of “Permitted Investments”; and 

(h) extensions, refinancings, modifications, amendments and restatements of any items of Permitted Indebtedness (a) through
(g) above, provided that the principal amount thereof is not increased or the terms thereof are not modified to impose more burdensome terms upon Borrower or its Subsidiary, as the case may be. 

“Permitted Investments” are: 

(a) Investments shown on the Perfection Certificate and existing on the Effective Date; 

(b) Investments consisting of Cash Equivalents; 

(c) Investments consisting of the endorsement of negotiable instruments for deposit or collection or similar transactions in the ordinary
course of Borrower; 

  
 33 

 (d) Investments consisting of deposit accounts in which Bank has a perfected security interest;

 (e) Investments accepted in connection with Transfers permitted by Section 7.1; 

(f) Investments of Subsidiaries in or to other Subsidiaries or Borrower and Investments by Borrower in Subsidiaries not to exceed Fifty
Thousand Dollars ($50,000) in the aggregate in any fiscal year; 
 (g) Investments consisting of (i) travel advances and employee
relocation loans and other employee loans and advances in the ordinary course of business, (ii) loans to employees, officers or directors relating to the purchase of equity securities of Borrower or its Subsidiaries pursuant to employee stock
purchase plans or agreements approved by Borrower’s Board of Directors, and (iii) repurchases of stock permitted under Section 7.7; 

(h) Investments (including debt obligations) received in connection with the bankruptcy or reorganization of customers or suppliers and in
settlement of delinquent obligations of, and other disputes with, customers or suppliers arising in the ordinary course of business; 
 (i)
Investments consisting of ownership interests in the Related Special Purpose Entities; 
 (j) RSPE Loans made by Borrower to Related Special
Purpose Entities which are owned by Borrower or are under Common Control with Borrower, which are made in accordance with the terms of Section 6.11, and which (i) do not exceed the Individual RSPE Note Threshold, and (ii) when taken
together with all other RSPE Loans by Borrower to Related Special Purpose Entities, do not exceed the Maximum Aggregate RSPE Loan Amount; 

(k) Investments consisting of notes receivable of, or prepaid royalties and other credit extensions, to customers and suppliers who are not
Affiliates, in the ordinary course of business; provided that this paragraph (i) shall not apply to Investments of Borrower in any Subsidiary; 

(l) Investments in prepaid expenses, negotiable instruments held for collection, and deposits to secure the performance of bids, trade
contracts (other than for borrowed money), contracts for the purchase of property, leases, statutory obligations, surety and appeal bonds, performance bonds and other obligations of a like nature, in each case, incurred in the ordinary course of
business and not representing an obligation for borrowed money; and 
 (m) joint ventures or strategic alliances not involving Related
Special Purpose Entities, in the ordinary course of Borrower’s business, consisting of the non-exclusive licensing of technology, the development of technology or the providing of technical support, provided that any cash investments by
Borrower do not exceed One Hundred Thousand Dollars ($100,000) in the aggregate in any fiscal year. 
 “Permitted
Liens” are: 

  
 34 

 (a) Liens existing on the Effective Date and shown on the Perfection Certificate or arising under
this Agreement and the other Loan Documents; 
 (b) Liens for taxes, fees, assessments or other government charges or levies, either not due
and payable or being contested in good faith and for which Borrower maintains adequate reserves on its Books, provided that no notice of any such Lien has been filed or recorded under the Internal Revenue Code of 1986, as amended, and the
Treasury Regulations adopted thereunder; 
 (c) purchase money Liens (i) on Equipment acquired or held by Borrower incurred for
financing the acquisition of the Equipment securing no more than Fifty Thousand Dollars ($50,000) in the aggregate amount outstanding, or (ii) existing on Equipment when acquired, if the Lien is confined to the property and improvements
and the proceeds of the Equipment; 
 (d) Liens of carriers, warehousemen, suppliers, or other Persons that are possessory in nature arising
in the ordinary course of business so long as such Liens attach only to Inventory, securing liabilities in the aggregate amount not to exceed Fifty Thousand Dollars ($50,000) and which are not delinquent or remain payable without penalty or which
are being contested in good faith and by appropriate proceedings which proceedings have the effect of preventing the forfeiture or sale of the property subject thereto; 

(e) Liens to secure payment of workers* compensation, employment insurance, old-age pensions, social security and other like obligations
incurred in the ordinary course of business (other than Liens imposed by ERISA); 
 (f) Liens incurred in the extension, renewal or
refinancing of the indebtedness secured by Liens described in (a) through (c); provided that any extension, renewal or replacement Lien must be limited to the property encumbered by the existing Lien and the principal amount of the indebtedness
may not increase; 
 (g) leases or subleases of real property granted in the ordinary course of Borrower’s business (or, if referring
to another Person, in the ordinary course of such Person’s business), and leases, subleases, non-exclusive licenses or sublicenses of personal property (other than Intellectual Property) granted in the ordinary course of Borrower’s
business (or, if referring to another Person, in the ordinary course of such Person’s business), if the leases, subleases, licenses and sublicenses do not prohibit granting Bank a security interest therein; 

(h) licenses of Intellectual Property permitted under Section 7.1; 

(i) Liens arising from attachments or judgments, orders, or decrees in circumstances not constituting an Event of Default under Sections 8.4
and 8,7; 
 (j) Liens in favor of other financial institutions arising in connection with Borrower’s deposit and/or securities accounts
held at such institutions, provided that Bank has a perfected security interest in the amounts held in such deposit and/or securities accounts; and 

  
 35 

 (k) Liens in favor of customs and revenue authorities to secure payment of customs duties in
connection with the importation of goods, incurred by Borrower in good faith in the ordinary course of business for sums not yet due, or which are being diligently contested by Borrower in good faith and by appropriate proceedings and reserves with
respect thereto are maintained on the books of Borrower in accordance with GAAP. 
 “Person” is any individual, sole
proprietorship, partnership, limited liability company, joint venture, company, trust, unincorporated organization, association, corporation, institution, public benefit corporation, firm, joint stock company, estate, entity or government agency.

 “Related Special Purpose Entity” is an entity formed under the laws of the Cayman Islands or the State of
Delaware, such other jurisdiction within the United States as shall be determined by Borrower’s Board of Directors, or such other jurisdiction reasonably acceptable to Bank, which entity is initially either owned by Borrower or is under Common
Control with Borrower, and is created for the purpose of facilitating a licensing, development, marketing, or other similar collaboration, strategic relationship or acquisition with respect to an individual drag discovery program between Borrower
and a “Big Pharma”, biotechnology, healthcare or other similar company or its affiliate. 
 “Registered
Organization” is any “registered organization” as defined in the Code with such additions to such term as may hereafter be made. 

“Repayment Period” is a period of time equal to thirty-five (35) consecutive months commencing on the Conversion
Date. 
 “Requirement of Law” is as to any Person, the organizational or governing documents of such Person,
and any law (statutory or common), treaty, rule or regulation or determination of an arbitrator or a court or other Governmental Authority, in each case applicable to or binding upon such Person or any of its property or to which such Person or any
of its property is subject. 
 “Responsible Officer” is any of the Chief Executive Officer, President, Chief
Financial Officer or Controller of Borrower. 
 “Restricted License” is any material license or other
agreement with respect to which Borrower is the licensee (a) that prohibits or otherwise restricts Borrower from granting a security interest in Borrower’s interest in such license or agreement or any other property, or (b) for which
a default under or termination of could interfere with the Bank’s right to sell any Collateral. 
 “RSPE
Loan” is defined in Section 6.11. 
 “RSPE Notice” is defined in Section 6.11. 

“SEC” shall mean the Securities and Exchange Commission, any successor thereto, and any analogous Governmental
Authority. 
 “Securities Account” is any “securities account” as defined in the Code with such
additions to such term as may hereafter be made. 

  
 36 

 “Subordinated Debt” is indebtedness incurred by Borrower subordinated to
all of Borrower’s now or hereafter indebtedness to Bank (pursuant to a subordination, intercreditor, or other similar agreement in form and substance satisfactory to Bank entered into between Bank and the other creditor), on terms acceptable to
Bank. 
 “Subsidiary” is, as to any Person, a corporation, partnership, limited liability company or other
entity of which shares of stock or other ownership interests having ordinary voting power (other than stock or such other ownership interests having such power only by reason of the happening of a contingency) to elect a majority of the board of
directors or other managers of such corporation, partnership or other entity are at the time owned, or the management of which is otherwise controlled, directly or indirectly through one or more intermediaries, or both, by such Person; provided,
however, that Related Special Purpose Entities shall not be “Subsidiaries” for purposes of the Loan Documents. Unless the context otherwise requires, each reference to a Subsidiary herein shall be a reference to a Subsidiary of
Borrower. 
 “Trademarks” means any trademark and servicemark rights, whether registered or not, applications
to register and registrations of the same and like protections, and the entire goodwill of the business of Borrower connected with and symbolized by such trademarks. 

“Transfer” is defined in Section 7.1. 

[Signature page follows.] 

  
 37 

 IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the
Effective Date, 
  

			
	BORROWER:
	
	ATYR PHARMA, TNC.
		
	By:	 	 /s/ John Mendlein, Ph.D.

		 	Name: John Mendlein
		 	Title: Chief Executive Officer
	
	BANK:
	
	SILICON VALLEY BANK
		
	By:	 	 /s/ Kevin Wallace

		 	Name: Kevin Wallace
		 	Title: Relationship Manager

 [Signature Page to Loan and Security Agreement] 

 EXHIBIT A 

The Collateral consists of all of Borrower’s right, title and interest in and to the following personal property: 

All goods, Accounts (including health-care receivables), Equipment, Inventory, contract rights or rights to payment of money, leases, license
agreements, franchise agreements, General Intangibles, commercial tort claims, documents, instruments (including any promissory notes), chattel paper (whether tangible or electronic), cash, deposit accounts, fixtures, letters of credit rights
(whether or not the letter of credit is evidenced by a writing), securities, and all other investment property, supporting obligations, and financial assets, whether now owned or hereafter acquired, wherever located; and 

All Borrower’s Books relating to the foregoing, and any and all claims, rights and interests in any of the above and all substitutions
for, additions, attachments, accessories, accessions and improvements to and replacements, products, proceeds and insurance proceeds of any or all of the foregoing. 

Notwithstanding the foregoing, the Collateral does not include any of the following: (a) more than 65% of the presently existing and
hereafter arising issued and outstanding shares of capital stock owned by Borrower of any Subsidiary formed in a jurisdiction outside the United States which shares entitle the holder thereof to vote for directors or any other matter,
(b) equity securities of any Related Special Purpose Entity, or (c) any Intellectual Property; provided, however, the Collateral shall include all Accounts and all proceeds of Intellectual Property. If a judicial authority (including a
U.S. Bankruptcy Court) would hold that a security interest in the underlying Intellectual Property is necessary to have a security interest in such Accounts and such property that are proceeds of Intellectual Property, then the Collateral shall
automatically, and effective as of the Effective Date, include the Intellectual Property to the extent necessary to permit perfection of Bank’s security interest in such Accounts and such other property of Borrower that are proceeds of the
Intellectual Property. 

  
 1 

 EXHIBIT B 

Loan Payment/Advance Request Form 

DEADLINE FOR SAME DAY PROCESSING IS NOON Pacific Time. 
  

							
	Fax To:	 	(858)            -            	  	Date:	  	  

  

							
	LOAN PAYMENT:	    	 	 	 
	 			 
	 	 		    		 	aTyr Pharma, Inc.
	 			 
	From Account#	 	  
	    	To Account #	 	  

	 	 	(Deposit Account #)	    		 	(Loan Account #)
	Principal $	 	  
	    	And/or Interest $	 	  

	Authorized Signature:	 	  
	    	Phone Number:	 	  

	Print Name/Title:	 	  

 
	    	 	 	 

  

							
	LOAN ADVANCE:	    	 	 	 
	 
	Complete Outgoing Wire Request section below if all or a portion of the funds from this loan advance are
for an outgoing wire.
	 			 
	From Account #	 	  
	    	To Account #	 	  

	 	 	(Loan Account #)	    		 	(Deposit Account #)
	Amount of Advance $	 	  
	    		 	 
	 
	All Borrower’s representations and warranties in the Loan and Security Agreement are true, correct and
complete in all material respects on the date of the request for an advance; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in
the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such date:
	 			 
	Authorized Signature:	 	  
	    	Phone Number	 	  

	Print Name/Title:	 	  

 
	    	 	 	 

  

									
	OUTGOING WIRE REQUEST:	 	 	    	 	 	 
	Complete only if all or a portion of funds from the loan advance above is to be wired.
	Deadline for same day processing is noon, P.S.T.
	 			 
	Beneficiary Name:	 	  
	    	Amount of Wire: $	 	  

	Beneficiary Bank:	 	  
	    	Account Number:	 	  

	City and State:	 		    		 	 
	 		 
	Beneficiary Bank Transit (ABA) #:	 	  
	    	Beneficiary Bank Code (Swift, Son, Chip, etc.):
	 	 		 		    	            (For International Wire Only)
	 			 
	Intermediary Bank:	 	  
	    	Transit (ABA) #:	 	  

	For Further Credit to:	 	  

	
 

	Special Instruction:	 	  

	 
	By signing below. I (we) acknowledge and agree that my (our) funds transfer request shall be processed in
accordance with and subject to the. terms and conditions set forth in the agreements(s) covering funds transfer service(s), which agreements(s) were previously received and executed by me (us).
	 			 
	Authorized Signature:	 	  
	    	2nd Signature (if required):	 	  

	Print Name/Title:	 	  
	    	Print Name/Title:	 	  

	Telephone #:	 	  
	    	Telephone #:	 	  

	 	 	 	 	 	    	 	 	 

  
 1 

 EXHIBIT C 

BORROWING RESOLUTIONS 

[see attached] 

  
 1 

 SVB Silicon Valley Bank 

CORPORATE BORROWING CERTIFICATE 
  

							
	BORROWER:    	 	aTyr Pharma, Inc.	  	DATE:	  	
	BANK:	 	Silicon Valley Bank	  		  	

 I hereby certify as follows, as of the date set forth above: 

 

	1.	I am the Secretary, Assistant Secretary or other officer of the Borrower. My title is as set forth below. 

  

	2.	Borrower’s exact legal name is set forth above. Borrower is a corporation existing under the laws of Delaware. 

  

	3.	Attached hereto are true, correct and complete copies’ of Borrower’s Articles/Certificate of Incorporation (including amendments), as tiled with the Secretary of State of the state in which Borrower is
incorporated as set forth in paragraph 2 above. Such Articles/Certificate of Incorporation have not been amended, annulled, rescinded, revoked or supplemented, and remain in full force and effect as of the date hereof. 

 

	4.	The following resolutions were duly and validly adopted by Borrower’s Board of Directors at a duly held meeting of such directors (or pursuant to a unanimous written consent or other authorized corporate action).
Such resolutions are in full force and effect as of the date hereof and have not been in any way modified, repealed, rescinded, amended or revoked, and Bank may rely on them until Bank receives written notice of revocation from Borrower.

 RESOLVED, that any one of the following officers or employees of Borrower, whose names, titles and signatures are
below, may act on behalf of Borrower: 
  

							
	 Name
	 	 Title
	  	 Signature
	  	 Authorized to

Add or Remove

Signatories

				
	 John Mendlein PhD
	 	 CEO
	  	 /s/ John Mendlein
	  	x
				
	 Andrew Cubitt
	 	 VP IP
	  	 /s/ Andrew Cubitt
	  	x
				
	  
	 	  
	  	  
	  	 ̈
				
	  
	 	  
	  	  
	  	 ̈

 RESOLVED FURTHER, that any one of the persons designated above with a checked box beside his or her name
may, from time to time, add or remove any individuals to and from the above list of persons authorized to act on behalf of Borrower. 

RESOLVED FURTHER, that such individuals may, on behalf of Borrower: 

Borrow Money. Borrow money from Silicon Valley Bank (“Bank”). 

Execute Loan Documents. Execute any loan documents Bank requires. 

Grant Security. Grant Bank a security interest in any of Borrower’s assets. 

Negotiate Items. Negotiate or discount all drafts, trade acceptances, promissory notes, or other indebtedness in which Borrower has an
interest and receive cash or otherwise use the proceeds. 
 Letters of Credit. Apply for letters of credit from Bank. 

  
 2 

 Foreign Exchange Contracts. Execute spot or forward foreign exchange contracts. 

Further Acts. Designate other individuals to request advances, pay fees and costs and execute other documents or agreements (including
documents or agreement that waive Borrowers right lo a jury trial) they believe to be necessary to effectuate such resolutions. 

RESOLVED FURTHER, that all acts authorized by the above resolutions and any prior acts relating thereto are ratified. 

 

	5.	The persons listed above are Borrower’s officers or employees with their titles and signatures shown next to their names. 

 

			
	By:	 	 /s/ John Mendlein

	Name:	 	John Mendlein PhD
	Title:	 	Chief Executive Officer

 *** If the Secretary, Assistant Secretary or other certifying officer executing above is
designated by the resolutions set forth in paragraph 4 as one of the authorized signing officers, this Certificate must also be signed by a second authorized officer or director of Borrower. 

I, the
                             of Borrower, hereby certify as to paragraphs 1 through 5 above, as of the
date set forth above. 
               [print title] 

 

			
	By:	 	  

	Name:	 	  

	Title:	 	  

  
 3 

 EXHIBIT D 

COMPLIANCE CERTIFICATE 
  

							
	TO:	 	SILICON VALLEY BANK	  	Date:	  	
	FROM:    	 	ATYR PHARMA, INC.	  		  	

 The undersigned authorized officer of aTyr Pharma, Inc. (“Borrower”) certifies that under the terms
and conditions of the Loan and Security Agreement between Borrower and Bank (the “Agreement”), (1) Borrower is in complete compliance for the period ending
                    with all required covenants except as noted below, (2) there are no Events of Default, (3) all representations and
warranties in the Agreement are true and correct in all material respects on this date except as noted below; provided, however, that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified
or modified by materiality in the text thereof; and provided, further that those representations and warranties expressly referring to a specific date shall be true, accurate and complete in all material respects as of such date, (4) Borrower,
and each of its Subsidiaries, has timely filed all required foreign, federal, state and material local tax returns and reports, and Borrower has timely paid all foreign, federal, state and material local taxes, assessments, deposits and
contributions owed by Borrower except as otherwise permitted pursuant to the terms of Section 5.8 of the Agreement, and (5) no Liens have been levied or claims made against Borrower or any of its Subsidiaries relating to unpaid employee
payroll or benefits of which Borrower has not previously provided written notification to Bank. Attached are the required documents supporting the certification. The undersigned certifies that these are prepared in accordance with GAAP consistently
applied from one period to the next except as explained in an accompanying letter or footnotes. The undersigned acknowledges that no borrowings may be requested at any time or date of determination that Borrower is not in compliance with any of the
terms of the Agreement, and that compliance is determined not just at the date this certificate is delivered. Capitalized terms used but not otherwise defined herein shall have the meanings given them in the Agreement. 

Please indicate compliance status by circling Yes/No under “Complies” column. 

 

					
	 Reporting Covenant
	  	
Required
	  	
Complies

	Monthly financial statements (consolidated and consolidating Borrower and Subsidiaries; balance sheets and funds flow (including note amount) to/from RSPEs) with Compliance
Certificate	  	Monthly within 30 days	  	Yes     No     
	Quarterly financial statements (full combination of Borrower, Subsidiaries and RSPE’s; true-up of funds flows (including note amount) to/from RSPE’s) with Compliance
Certificate	  	Quarterly within 30 days	  	Yes     No     
	Annual financial statement (consolidated and consolidating Borrower and Subsidiaries; combined with RSPEs) (CPA Audited) with Compliance Certificate	  	FYE within 180 days	  	Yes     No     
	Annual Board Approved Financial Projections	  	Earlier of 7 days of board approval or 60 days after FYE	  	Yes     No     
	 
	 How much is Borrower’s Consolidated Cash (i.e.
combined with Related Special Purpose Entities): $            
  

Aggregate RSPE Loans made in immediately preceding fiscal quarter: $             (Maximum
Permitted $2,000,000 per fiscal quarter)
 Has any RSPE failed to make payments of at least 85% of the applicable RSPE Loan within 90 days following
funding of such RSPE Loan?         Yes         No. If Yes, please
explain:                        

  
 1 

 The following are the exceptions with respect to the certification above: (If no exceptions exist, state “No
exceptions to note.”) 
  
  

 
  
  

									
	aTyr Pharma, Inc.	 		 	BANK USE ONLY
					
	By:	 	  
	 		 	Received by:	 	  

	Name:	 	  
	 		 		 	AUTHORIZED SIGNER
	Title:	 	  
	 		 		 	
		 		 		 	Date:	 	  

					
		 		 		 	Verified:	 	  

		 		 		 		 	AUTHORIZED SIGNER
					
		 		 		 	Date:	 	  

				
		 		 		 	Compliance Status:    Yes    No    

  
 2 

 FIRST AMENDMENT 

TO 
 LOAN AND SECURITY
AGREEMENT 
 This First Amendment to Loan and Security Agreement (this “Amendment”) is entered into as of
July 24, 2013, by and between Silicon Valley Bank (“Bank”) and aTyr Pharma, Inc., a Delaware corporation (“Borrower”) whose address is 3545 John Hopkins Court, #250, San Diego, CA 92121.

 RECITALS 
 A.
Bank and Borrower have entered into that certain Loan and Security Agreement dated as of April 25, 2012 (as the same may from time to time be amended, modified, supplemented or restated, the “Loan Agreement”). 

B. Bank has extended credit to Borrower for the purposes permitted in the Loan Agreement. 

C. Borrower has requested that Bank amend the Loan Agreement to (i) refinance the existing Indebtedness, (ii) provide additional
growth capital financing, and (iii) make certain other revisions to the Loan Agreement as more fully set forth herein. 
 D. Bank has
agreed to so amend certain provisions of the Loan Agreement, but only to the extent, in accordance with the terms, subject to the conditions and in reliance upon the representations and warranties set forth below. 

AGREEMENT 
 NOW,
THEREFORE, in consideration of the foregoing recitals and other good and valuable consideration, the receipt and adequacy of which is hereby acknowledged, and intending to be legally bound, the parties hereto agree as follows: 

1. Definitions. Capitalized terms used but not defined in this Amendment shall have the meanings given to them in the Loan Agreement.

 2. Amendments to Loan Agreement. 

2.1 Section 2.1.2 (Supplemental Growth Capital Loan). A new Section 2.1.2 is added to the Loan Agreement as follows: 

2.1.1 Supplemental Growth Capital Loan. 

(a) Availability. Subject to the terms and conditions of this Agreement, Bank agrees to make advances to Borrower (each
a “Supplemental Growth Capital Advance” and collectively the “Supplemental Growth Capital Advances”), from time to time, prior to the Supplemental Growth Capital Commitment Termination Date, in an aggregate amount
not to exceed the Supplemental Growth Capital Loan Commitment. 

 (i) Five Million Dollars ($5,000,000) of the Supplemental Growth Capital Loan
Commitment (the “Supplemental First Tranche”) shall be funded in one (1) Supplemental Growth Capital Advance on or about the First Amendment Date, which Supplemental Growth Capital Advance shall be used to repay in full all
Obligations with respect to the Growth Capital Advances. After repayment, the Supplemental Growth Capital Advance under the Supplemental First Tranche may not be reborrowed. 

(ii) Subject to the terms of this Agreement and Borrower’s satisfaction of the Supplemental Second Tranche Funding
Condition, the remaining Five Million Dollars ($5,000,000) of the Supplemental Growth Capital Loan Commitment (the “Supplemental Second Tranche”) shall be funded in one (1) Supplemental Growth Capital Advance on or prior to the
Supplemental Growth Capital Commitment Termination Date. Funds will be available under the Supplemental Second Tranche as soon as Borrower delivers to Bank evidence satisfactory to Bank that Borrower has satisfies the Supplemental Second Tranche
Funding Condition as of the date of such Supplemental Growth Capital Advance. After repayment, the Supplemental Growth Capital Advance under the Supplemental Second Tranche may not be reborrowed. 

(b) Repayment of Supplemental Growth Capital Advances. 

(i) Interest-Only Payments. For each Supplemental Growth Capital Advance, Borrower shall make monthly payments of
interest-only commencing on the first (1st) Business Day of the first (1st) month following the month in which the Funding Date
occurs with respect to such Supplemental Growth Capital Advance and continuing thereafter during the Supplemental Interest-Only Period, on the first (1st) Business Day of each successive
month. 
 (ii) Principal and Interest Payments. For each Supplemental Growth Capital Advance outstanding as of the
last day of the Supplemental Interest-Only Period, Borrower shall make thirty-six (36) consecutive equal monthly payments of principal and accrued but unpaid interest, commencing on the first
(1st) Business Day of the first (1st) month after the Supplemental Interest-Only Period (the “Supplemental Conversion Date”), in principal amounts that would fully
amortize the applicable Supplemental Growth Capital Advance, as of the Supplemental Conversion Date, over the Supplemental Repayment Period. The Supplemental Final Payment and all unpaid principal and accrued and unpaid interest on each Supplemental
Growth Capital Advance are due and payable in full on the Supplemental Growth Capital Maturity Date. 
 (c) Voluntary
Prepayment. Borrower shall have the option to prepay all Supplemental Growth Capital Advances in full, provided Borrower (i) shall provide written notice to Bank of its election to prepay the Supplemental Growth Capital Advances at least
ten (10) days prior to such prepayment and (ii) pays, on the date of such prepayment, (a) all outstanding principal and accrued but unpaid interest, plus (b) the Supplemental Prepayment Fee, plus (c) the Supplemental Final
Payment, plus (d) all other sums, including Bank Expenses, if any, that shall have become due and payable. 

  
 2 

 (d) Mandatory Prepayment Upon an Acceleration. If the Supplemental Growth
Capital Advances are accelerated in accordance with the terms of this Agreement following the occurrence of an Event of Default, Borrower shall immediately pay to Bank an amount equal to the sum of (i) all outstanding principal and accrued but
unpaid interest, plus (ii) the Supplemental Final Payment, plus (iii) all other sums, including Bank Expenses, if any, that shall have become due and payable in accordance with the terms of this Agreement. 

2.2 Section 2.2 (Payment of Interest on the Credit Extensions). Section 2.2(a) is amended in its entirety and replaced with
the following: 
 (a) Interest Rate. 

(i) Supplemental First Tranche. Subject to Section 2.2(b), the principal amount outstanding for the Supplemental
Growth Capital Advance under the Supplemental First Tranche shall accrue interest at a fixed per annum rate equal to five percent (5.00%), which shall be payable monthly in arrears. 

(ii) Supplemental Second Tranche. Subject to Section 2.2(b), the principal amount outstanding for the Supplemental
Growth Capital Advance under the Supplemental Second Tranche shall accrue interest at a per annum rate equal to the greater of (A) five percentage points (5.00%) above the Basic Rate or (B) five and one-half percent (5.50%), fixed on
the Funding Date for such Supplemental Growth Capital Advance, which shall be payable monthly in arrears. 
 2.3 Section 2.3
(Fees). Section 2.3(a) is amended in its entirety and replaced with the following: 
 (a) Final Payment. The
accrued portion of the Final Payment, which is equal to Thirty-Six Thousand Three Hundred Nineteen Dollars and Six Cents ($36,468.70) as of the First Amendment Date, shall be due and payable on the First Amendment Date; 

2.4 Section 2.3 (Fees). Section 2.3 is amended by deleting the word “and” from the end of clause (b),
replacing the period at the end of clause (c) with a semicolon, and adding new clauses (d) and (e) as follows: 

(d) Supplemental Final Payment. The Supplemental Final Payment, when due hereunder; and 

(e) Supplemental Prepayment Fee. The Supplemental Prepayment Fee, when due hereunder. 

2.5 Section 6.6 (Operating Accounts). Section 6.6(a) is amended by deleting the reference to “eighty percent (80%)”
and replacing it with “eighty-five percent (85%)”; and inserting a new sentence at the end of Section 6.6(a) that reads as follows: “Notwithstanding the foregoing, Borrower shall be deemed in compliance with this
Section 6.6(a) if Borrower and the Related Special Purpose Entities maintain at least eighty-five percent (85%) of all Consolidated Cash with Bank or Bank’s Affiliates.” 

  
 3 

 2.6 Section 8.1 (Payment Default). Section 8.1 is amended by deleting the
reference to “Growth Capital Maturity Date” and replacing it with “Supplemental Growth Capital Maturity Date.” 
 2.7
Section 13 (Definitions). The following terms and their definitions set forth in Section 13.1 are amended in their entirety and replaced with the following: 

“Credit Extension” is any Growth Capital Advance, Supplemental Growth Capital Advance or any other extension
of credit by Bank for Borrower’s benefit under this Agreement. 
 “Maximum Aggregate RSPE Loan Amount”
is Two Million Five Hundred Thousand Dollars ($2,500,000) per fiscal quarter of Borrower. 
 2.8 Section 13 (Definitions). The
following terms and their respective definitions are added to Section 13.1, in appropriate alphabetical order, as follows: 

“First Amendment” is that certain First Amendment to Loan and Security Agreement by and between Bank and
Borrower dated as of July 24, 2013 (the “First Amendment Date”). 
 “Supplemental Conversion
Date” is defined in Section 2.1.2(b)(ii). 
 “Supplemental Final Payment” is a payment (in
addition to and not a substitution for the regular monthly payments of principal and accrued interest) due in accordance with Section 2.1.2 above, equal to the original principal amount of the applicable Supplemental Growth Capital Advance
multiplied by the Supplemental Final Payment Percentage. 
 “Supplemental Final Payment Percentage” is
(a) with respect to the Supplemental Growth Capital Advance under the Supplemental First Tranche, three percent (3.00%), and (b) with respect to the Supplemental Growth Capital Advance under the Supplemental Second Tranche, seven percent
(7.00%). 
 “Supplemental First Tranche” is defined in Section 2.1.2(a)(i). 

“Supplemental Growth Capital Advance” is defined in Section 2.1.2(a). 

“Supplemental Growth Capital Commitment Termination Date” is June 30, 2014. 

“Supplemental Growth Capital Loan Commitment” is Ten Million Dollars ($10,000,000). 

“Supplemental Growth Capital Maturity Date” is June 1, 2017. 

  
 4 

 “Supplemental Interest-Only Period” means the period commencing
on the first (1st) Business Day following a Funding Date of a Supplemental Growth Capital Advance and continuing through June 30, 2014. 

“Supplemental Prepayment Fee” is an amount equal to Two Hundred Thousand Dollars ($200,000); provided,
however, that Bank shall waive the Supplemental Prepayment Fee in its entirety if Bank closes on the refinance and re-documentation of the Supplemental Growth Capital Advances under any division of Bank or an affiliate of Bank (in its sole and
exclusive discretion) prior to the Supplemental Growth Capital Maturity Date, even if additional lenders or debt partners participate in such refinancing (so long as Bank’s portion in any such refinancing is at least the lesser of Ten Million
Dollars ($10,000,000) or fifty percent (50%) of the aggregate loan commitment). 
 “Supplemental Repayment
Period” is a period of time commencing on July 1, 2014 and continuing through the Supplemental Growth Capital Maturity Date. 

“Supplemental Second Tranche” is defined in Section 2.1.2(a)(ii). 

“Supplemental Second Tranche Advance” means the Supplemental Growth Capital Advance under the Supplemental
Second Tranche. 
 “Supplemental Second Tranche Funding Condition” means, with respect to the Supplemental
Second Tranche Advance, that either (a) as of the date of funding of the Supplemental Second Tranche Advance, the human clinical trials and dosing for the development of Borrower’s lead program (ATYR1940) remain active and ongoing, or
(b) on or prior to the date of funding of the Supplemental Second Tranche Advance, Borrower has closed on a collaboration agreement on one of Borrower’s secondary assets (i.e., any asset other than Resokine), with an upfront
payment of not less than Fifteen Million Dollars ($15,000,000), including expense reimbursements, on terms reasonably acceptable to Bank. 

3. Limitation of Amendments. 

3.1 The amendments set forth in Section 2, above, are effective for the purposes set forth herein and shall be limited precisely
as written and shall not be deemed to (a) be a consent to any amendment, waiver or modification of any other term or condition of any Loan Document, or (b) otherwise prejudice any right or remedy which Bank may now have or may have in the
future under or in connection with any Loan Document. 
 3.2 This Amendment shall be construed in connection with and as part of the
Loan Documents and all terms, conditions, representations, warranties, covenants and agreements set forth in the Loan Documents, except as herein amended, are hereby ratified and confirmed and shall remain in full force and effect. 

  
 5 

 4. Representations and Warranties. To induce Bank to enter into this Amendment, Borrower
hereby represents and warrants to Bank as follows: 
 4.1 Immediately after giving effect to this Amendment (a) the
representations and warranties contained in the Loan Documents are true, accurate and complete in all material respects as of the date hereof (except to the extent such representations and warranties relate to an earlier date, in which case they are
true and correct in all material respects as of such date), and (b) no Event of Default has occurred and is continuing; 
 4.2
Borrower has the power and authority to execute and deliver this Amendment and to perform its obligations under the Loan Agreement, as amended by this Amendment; 

4.3 The organizational documents of Borrower most recently delivered to Bank remain true, accurate and complete and have not been
amended, supplemented or restated and are and continue to be in full force and effect; 
 4.4 The execution and delivery by Borrower
of this Amendment and the performance by Borrower of its obligations under the Loan Agreement, as amended by this Amendment, have been duly authorized; 

4.5 The execution and delivery by Borrower of this Amendment and the performance by Borrower of its obligations under the Loan
Agreement, as amended by this Amendment, do not and will not contravene (a) any material law or regulation binding on or affecting Borrower, (b) any material contractual restriction with a Person binding on Borrower, (c) any order,
judgment or decree of any court or other governmental or public body or authority, or subdivision thereof, binding on Borrower, or (d) the organizational documents of Borrower; 

4.6 The execution and delivery by Borrower of this Amendment and the performance by Borrower of its obligations under the Loan
Agreement, as amended by this Amendment, do not require any order, consent, approval, license, authorization or validation of, or filing, recording or registration with, or exemption by any governmental or public body or authority, or subdivision
thereof, binding on either Borrower, except as already has been obtained or made; and 
 4.7 This Amendment has been duly executed
and delivered by Borrower and is the binding obligation of Borrower, enforceable against Borrower in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization, liquidation, moratorium or other
similar laws of general application and equitable principles relating to or affecting creditors’ rights. 
 5. Integration. This
Amendment and the Loan Documents represent the entire agreement about this subject matter and supersede prior negotiations or agreements. All prior agreements, understandings, representations, warranties, and negotiations between the parties about
the subject matter of this Amendment and the Loan Documents merge into this Amendment and the Loan Documents. 

  
 6 

 6. Counterparts. This Amendment may be executed in any number of counterparts and all of
such counterparts taken together shall be deemed to constitute one and the same instrument. 
 7. Effectiveness. This Amendment shall
be deemed effective upon (a) the due execution and delivery to Bank of this Amendment by each party hereto, (b) the due execution and delivery to Bank of a Warrant to Purchase Stock in substantially the form attached hereto as
Exhibit A, (c) Borrower’s payment of the accrued portion of the Final Payment in accordance with Section 2.3(a) of the Loan Agreement, and (d) payment of Bank’s reasonable legal fees and expenses in connection with the
negotiation and preparation of this Amendment. 
 [Signature page follows.] 

  
 7 

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

									
	BANK	 		 	BORROWER
			
	Silicon Valley Bank	 		 	aTyr Pharma, Inc.
					
	By:	 	 /s/ Kevin Wallace
	 		 	By:	 	 /s/ John Mendlein

		 	Name: Kevin Wallace	 		 		 	Name: John Mendlein
		 	Title: Vice President	 		 		 	Title: CEO

 [Signature Page to First Amendment to Loan and Security Agreement] 

 EXHIBIT A 

WARRANT TO PURCHASE STOCK 

  
 A-1

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