PR:000000015	follistatin	activin-binding protein|FS|FST		participates_in	GO:0032926	negative regulation of activin receptor signaling pathway			PIRSF:PIRSF002278	ISS		PIRSF:PIRSF002278	PIRSF:PIRSF002278|UniProtKB:P19883|UniProtKB:P47931	20080301	PRO:CNA	
PR:000000015	follistatin	activin-binding protein|FS|FST		has_part	Pfam:PF00050	Kazal-type serine protease inhibitor domain			PIRSF:PIRSF002278	ISS		PIRSF:PIRSF002278	PIRSF:PIRSF002278|UniProtKB:P19883|UniProtKB:P47931	20080301	PRO:CNA