Variable signaling activity by FOP ACVR1 mutations
Keywords: ACVR1; activin A receptor type 1; BMP; bone morphogenetic protein; HO; heterotopic ossification; FOP; fibrodysplasia ossificans progressiva; LBD; extracellular ligand-binding domain; GS; glycine-serine rich domain; PK; protein kinase domain; TGF-beta; tra