89468-62-2 Exendin 2 Heliodermin Helodermin Helospectin I, 5-L-isoleucine-8-L-glutamine-9-L-glutamine-24-L-alanine-30-L-arginine-34-de-L-arginine-36-L-prolinamide-37-de-L-serine-38-de-L-serine-