CUSIP No. 299734103

Exhibit 99.1

JOINT FILING AGREEMENT

The persons below hereby agree that the Schedule 13D to which this agreement is attached as an exhibit, as well as all future amendments to such Schedule 13D, shall be filed jointly on behalf of each of them. This agreement is intended to satisfy the requirements of Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934.

Dated: June 1, 2022

FLAGSHIP VENTURELABS IV LLC
By: Flagship Ventures Fund IV, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURES FUND IV, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURES FUND IV-RX, L.P.
By: Flagship Ventures Fund IV General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURES FUND IV GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURELABS V LLC
By:	Flagship VentureLabs V Manager LLC
By:	Flagship Pioneering, Inc.

CUSIP No. 299734103

By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Chief Executive Officer
FLAGSHIP VENTURELABS V MANAGER LLC
By:	Flagship Pioneering, Inc.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Chief Executive Officer
FLAGSHIP VENTURES FUND V, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP V VENTURLABs RX FUND, L.P.
By: Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
NUTRITIONAL HEALTH SIDE FUND, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
NUTRITIONAL HEALTH DISRUPTIVE INNOVATION FUND, L.P.
By:	Flagship Ventures Fund V General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager

CUSIP No. 299734103

FLAGSHIP VENTURES FUND V GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURES OPPORTUNITIES FUND I, L.P.
By:	Flagship Ventures Opportunities Fund I General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP VENTURES OPPORTUNITIES FUND I GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
NUTRITIONAL HEALTH LTP FUND, L.P.
By:	Nutritional Health LTP Fund General Partner LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
NUTRITIONAL HEALTH LTP FUND GENERAL PARTNER LLC
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Manager
FLAGSHIP PIONEERING FUND VII, L.P.
By:	Flagship Pioneering Fund VII General Partner LLC
By:	Flagship Pioneering, Inc.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Chief Executive Officer

CUSIP No. 299734103

FLAGSHIP PIONEERING FUND VII GENERAL PARTNER LLC
By:	Flagship Pioneering, Inc.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Chief Executive Officer
FLAGSHIP PIONEERING, INC.
By:	/s/ Noubar B. Afeyan, Ph.D.
Name:	Noubar B. Afeyan, Ph.D.
Title:	Chief Executive Officer
/s/ Noubar B. Afeyan, Ph.D.
NOUBAR B. AFEYAN, PH.D.