GRP GI:60498999 gastrin-releasing peptide isoform 3 preproprotein 1 mrgrelplvl lalvlclapr gravplpagg gtvltkmypr gnhwavghlm 50 51 gkkstgesss vsergslkqq lreyirweea arnllgliea kenrnhqppq 100 101 pkalgnqqps wdsedssnfk dlvdsllqvl nvkegtps