Blueprint Medicines Corp (BPMC): Biotechnology Value Fund Reports 10.4% Stake

Page 10 of 11 – SEC Filing

SIGNATURE

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated:  May 3, 2016

BIOTECHNOLOGY VALUE FUND, L.P.
				BVF INC.
By:	BVF Partners L.P., its general partner
By:	BVF Inc., its general partner		By:	/s/ Mark N. Lampert
				Mark N. Lampert
By:	/s/ Mark N. Lampert			President
	Mark N. Lampert
	President
				MARK N. LAMPERT
BIOTECHNOLOGY VALUE FUND II, L.P.
By:	BVF Partners L.P., its general partner
By:	BVF Inc., its general partner			/s/ Mark N. Lampert
By:	/s/ Mark N. Lampert
	Mark N. Lampert
	President
BVF PARTNERS L.P.
By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert
	President

BVF PARTNERS OS LTD.
By:	BVF Partners L.P., its sole member
By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert
	President
BIOTECHNOLOGY VALUE TRADING FUND OS LP
By:	BVF Partners L.P., its investment manager
By:	BVF Inc., its general partner
By:	/s/ Mark N. Lampert
	Mark N. Lampert
	President