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:Q13705-1	activin receptor type-2B isoform ActR-IIB2 (human)	hACVR2B/iso:ActR-IIB2		acts_upstream_of_or_within	GO:0007178	cell surface receptor protein serine/threonine kinase signaling pathway			PMID:8161782	TAS	NCBITaxon:9606		UniProtKB:Q13705-1	20080301	PRO:CNA