PRO_ID	Object_term	Object_syny	Modifier	Relation	Ontology_ID	Ontology_term	Relative_to	Interaction_with	Evidence_source	Evidence_code	Taxon	Inferred_from	DB_ID	Date	Assigned_by	Comment
PR:000000071	activin receptor type-2B	activin receptor type IIB|ACTR-IIB|ACVR2B		enables	GO:0048185	activin binding			PIRSF:PIRSF500456	ISS		PIRSF:PIRSF500456|UniProtKB:P27040|UniProtKB:Q13705|UniProtKB:Q3KQI1	PIRSF:PIRSF500456|UniProtKB:P27040|UniProtKB:Q13705|UniProtKB:Q3KQI1	20080301	PRO:CNA	
PR:000000071	activin receptor type-2B	activin receptor type IIB|ACTR-IIB|ACVR2B		acts_upstream_of_or_within	GO:0032924	activin receptor signaling pathway			PIRSF:PIRSF500456	ISS		PIRSF:PIRSF500456|UniProtKB:P27040|UniProtKB:Q13705|UniProtKB:Q3KQI1	PIRSF:PIRSF500456|UniProtKB:P27040|UniProtKB:Q13705|UniProtKB:Q3KQI1	20080301	PRO:CNA