EXHIBIT A

Joint Filing Statement

We, the undersigned, hereby express our agreement that the attached Amendment No. 4 to Schedule 13D is filed on behalf of each of us.

Dated: February 3, 2022

THE COLUMN GROUP, LP		THE COLUMN GROUP GP, LP
By:	The Column Group GP, LP
By:	/s/ James Evangelista, Attorney-in-Fact	By:	/s/ James Evangelista, Attorney-in-Fact
THE COLUMN GROUP II, LP		THE COLUMN GROUP II GP, LP
By:	The Column Group II GP, LP	By:	/s/ James Evangelista, Attorney-in-Fact
By:	/s/ James Evangelista, Attorney-in-Fact
PONOI CAPITAL, LP		PONOI MANAGEMENT, LLC
By:	Ponoi Management, LLC	By:	/s/ James Evangelista, Attorney-in-Fact
By:	/s/ James Evangelista, Attorney-in-Fact
PONOI CAPITAL II, LP		PONOI II MANAGEMENT, LLC
By:	Ponoi II Management, LLC	By:	/s/ James Evangelista, Attorney-in-Fact
By:	/s/ James Evangelista, Attorney-in-Fact
THE COLUMN GROUP MANAGEMENT, LP		THE COLUMN GROUP III GP, LP
By:	/s/ James Evangelista, Attorney-in-Fact	By:	/s/ James Evangelista, Attorney-in-Fact
THE COLUMN GROUP III, LP		THE COLUMN GROUP III-A, LP
By:	The Column Group III GP, LP	By:	The Column Group III GP, LP
By:	/s/ James Evangelista, Attorney-in-Fact	By:	/s/ James Evangelista, Attorney-in-Fact
By:	/s/ James Evangelista, Attorney-in-Fact on behalf of Peter Svennilson	By:	/s/ James Evangelista, Attorney-in-Fact on behalf of Tim Kutzkey
By:	/s/ James Evangelista, Attorney-in-Fact on behalf of David V. Goeddel
THE COLUMN GROUP IV, LP
By:	The Column Group IV GP, LP
By:	TCG IV GP, LLC
By:	/s/ James Evangelista, Attorney-in-Fact
THE COLUMN GROUP IV-A, LP
By:	The Column Group IV GP, LP
By:	TCG IV GP, LLC
By:	/s/ James Evangelista, Attorney-in-Fact
THE COLUMN GROUP IV GP, LP
By:	TCG IV GP, LLC
By:	/s/ James Evangelista, Attorney-in-Fact
TCG IV GP, LLC
By:	/s/ James Evangelista, Attorney-in-Fact