the secondary structures of three gastrin analogs , hc1 x h-trp-nle-asp ( o-tbu ) -phe-nh2 ( tetragastrin ) , pglu-ala-tyr-gly-trp-nle-asp-phe-nh2 ( octagastrin ) , and h-leu- ( glu ) 5-ala-tyr-gly-trp-nle-asp-phe-nh2 ( minigastrin ) were studied by 1h-n.m.r . in dimethylsulfoxide and in trifluoroethanol .
C0017151
gastrin
C0039659
tetragastrin