EXHIBIT 1
AGREEMENT
The persons below hereby agree that the Schedule 13G to which this agreement is attached as an exhibit, as well as all future amendments to such Schedule 13G, shall be filed on behalf of each of them. This agreement is intended to satisfy the requirements of Rule13d-1(k)(1)(iii) under the Securities Exchange Act of 1934.
Date: February13, 2017
FLAGSHIP VENTURES FUND 2007, L.P.
| By: | Flagship Ventures 2007 General Partner LLC | |
| General Partner | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
| FLAGSHIP VENTURES 2007 GENERAL PARTNER LLC | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
FLAGSHIP VENTURES FUND IV, L.P.
| By: | Flagship Ventures Fund IV General Partner LLC | |
| General Partner | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
FLAGSHIP VENTURES FUNDIV-RX, L.P.
| By: | Flagship Ventures Fund IV General Partner LLC | |
| General Partner | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
FLAGSHIP VENTURELABS IV, LLC
| By: | Flagship Ventures Fund IV, L.P. | |
| Manager | ||
| By: | Flagship Ventures Fund IV General Partner LLC | |
| General Partner | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
| FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC | ||
| By: | /s/ Noubar B. Afeyan | |
| Noubar B. Afeyan, Ph.D. | ||
| Manager | ||
/s/ NOUBAR B. AFEYAN | ||
| NOUBAR B. AFEYAN, PH.D. | ||
/s/ EDWIN M. KANIA, JR. | ||
| EDWIN M. KANIA, JR. | ||
