title: Amino-terminal extension analogs of methionine-enkephalin.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001681:Biological Assay; D004723:Endorphins / Q000138:chemical synthesis / Q000494:pharmacology; D004745:Enkephalins / Q000138:chemical synthesis / Q000494:pharmacology; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D008083:beta-Lipotropin
chemical_list: D000596:Amino Acids; D004723:Endorphins; D004745:Enkephalins; D008083:beta-Lipotropin