PDGFA GI:15208656 platelet-derived growth factor alpha isoform 2 preproprotein 1 mrtlacllll gcgylahvla eeaeiprevi erlarsqihs irdlqrllei 50 51 dsvgsedsld tslrahgvha tkhvpekrpl pirrkrsiee avpavcktrt 100 101 viyeiprsqv dptsanfliw ppcvevkrct gccntssvkc qpsrvhhrsv 150 151 kvakveyvrk kpklkevqvr leehlecaca ttslnpdyre edtdvr