title: Inhibitory effect of methionine- and leucine-enkephalin on contractions of the guinea-pig ileum elicited by PGE1.
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects / Q000502:physiology; D007930:Leucine; D008297:Male; D008715:Methionine; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects / Q000502:physiology*; D009842:Oligopeptides / Q000494:pharmacology*; D011458:Prostaglandins E / Q000494:pharmacology*
chemical_list: D009842:Oligopeptides; D011458:Prostaglandins E; D008715:Methionine; D007930:Leucine