title: Bradykinin analogues containing N alpha-methyl amino acids.
abstract: Analogues of bradykinin were synthesized containing single substitutions by N alpha-methyl amino acids in the 1, 4, 5, 5, and 9 positions. [MeArg]Bradykinin possessed 60% of the muscle-contracting activity of the parent compound in a guinea pig ileum assay. The other analogues were very weak agonists (less than 2%) and, disappointingly, failed to show blocking activity except at very high doses.
mesh_terms: D000818:Animals; D001920:Bradykinin / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors / Q000138:chemical synthesis / Q000494:pharmacology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008745:Methylation; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects
chemical_list: D001920:Bradykinin