[Term] id: PR:000000212 name: activin receptor type-2B isoform ActR-IIB3 def: "An activin receptor type-2B that is a translation product of some mRNA whose exon structure and start site selection renders it capable of giving rise to a protein with the amino acid sequence represented by UniProtKB:P27040-3 or a 1:1 ortholog thereof." [PRO:CNA, PRO:DAN] comment: Category=sequence. Note: This isoform lacks the cluster of proline residues within the extracellular domain located immediately before the transmembrane region (known as splicing cassette I). synonym: "ACVR2B/iso:ActR-IIB3" EXACT PRO-short-label [PRO:DNx] synonym: "activin receptor type-2B isoform 4" EXACT [PRO:CNA, PRO:DAN] synonym: "ACVR2B isoform 4" EXACT [PRO:DNx] property_value: has_archetype PR:P27040-3 is_a: PR:000000071 ! activin receptor type-2B