PR:000036437	activin receptor type-1B isoform 1 phosphorylated 1 (human)	hACVR1B/iso:1/Phos:1		capable_of	GO:0046332	SMAD binding		PR:000000066	PMID:12065756	IPI	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:000036437	activin receptor type-1B isoform 1 phosphorylated 1 (human)	hACVR1B/iso:1/Phos:1		participates_in	GO:0006468	protein phosphorylation			PMID:12065756	IDA	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:000036437	activin receptor type-1B isoform 1 phosphorylated 1 (human)	hACVR1B/iso:1/Phos:1		located_in	GO:0005887	integral component of plasma membrane			PMID:8397373	IDA	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:000036437	activin receptor type-1B isoform 1 phosphorylated 1 (human)	hACVR1B/iso:1/Phos:1		capable_of	GO:0016361	activin receptor activity, type I			PMID:8622651	IDA	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:000036437	activin receptor type-1B isoform 1 phosphorylated 1 (human)	hACVR1B/iso:1/Phos:1		located_in	GO:0009986	cell surface			PMID:12665502	IDA	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:P36896-1	activin receptor type-1B isoform 1 (human)	activin receptor type-1B isoform SKR2-1 (human)|hACVR1B/iso:1		participates_in	GO:0007178	transmembrane receptor protein serine/threonine kinase signaling pathway			PMID:11069203	IDA	NCBITaxon:9606		UniProtKB:P36896-1	20080301	PRO:CNA	
PR:P36896-2	activin receptor type-1B isoform 2 (human)	activin receptor type-1B isoform SKR2-2 (human)|hACVR1B/iso:2		located_in	GO:0005887	integral component of plasma membrane			PMID:11117535|PMID:8636304	IDA	NCBITaxon:9606		UniProtKB:P36896-2	20080301	PRO:CNA	
PR:P36896-2	activin receptor type-1B isoform 2 (human)	activin receptor type-1B isoform SKR2-2 (human)|hACVR1B/iso:2	NOT	capable_of	GO:0016361	activin receptor activity, type I			PMID:11117535|PMID:8636304	IDA	NCBITaxon:9606		UniProtKB:P36896-2	20080301	PRO:CNA	
PR:P36896-3	activin receptor type-1B isoform 3 (human)	activin receptor type-1B isoform SKR2-3 (human)|hACVR1B/iso:3		located_in	GO:0005887	integral component of plasma membrane			PMID:11117535|PMID:8636304	IDA	NCBITaxon:9606		UniProtKB:P36896-3	20080301	PRO:CNA	
PR:P36896-3	activin receptor type-1B isoform 3 (human)	activin receptor type-1B isoform SKR2-3 (human)|hACVR1B/iso:3	NOT	capable_of	GO:0016361	activin receptor activity, type I			PMID:11117535|PMID:8636304	IDA	NCBITaxon:9606		UniProtKB:P36896-3	20080301	PRO:CNA