SST GI:4507243 somatostatin preproprotein 1 mlscrlqcal aalsivlalg cvtgapsdpr lrqflqksla aaagkqelak 50 51 yflaellsep nqtendalep edlsqaaeqd emrlelqrsa nsnpamapre 100 101 rkagcknffw ktftsc