the membrane actions of some tetrapeptide amides and heptapeptide amides chemically related to the molluscan neuropeptides phe-met-arg-phe-nh2 ( fmrfamide ) and p-glu-asp-pro-phe-leu-arg-phe-nh2 ( pqdpflrfamide ) were tested and compared on identified neurones of helix aspersa .
C0027895
neuropeptides
C0060608
fmrfamide