VIP GI:4507897 vasoactive intestinal peptide isoform 1 preproprotein 1 mdtrnkaqll vlltllsvlf sqtsawplyr apsalrlgdr ipfeganepd 50 51 qvslkedidm lqnalaendt pyydvsrnar hadgvftsdf skllgqlsak 100 101 kyleslmgkr vssnisedpv pvkrhsdavf tdnytrlrkq mavkkylnsi 150 151 lngkrssege spdfpeelek