title: A new approach to conformationally restricted peptide analogs: rigid beta-bends. 1. Enkephalin as an example.
mesh_terms: D000818:Animals; D001681:Biological Assay; D004743:Enkephalin, Leucine / Q000494:pharmacology; D004744:Enkephalin, Methionine / Q000494:pharmacology; D004745:Enkephalins / Q000494:pharmacology; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D008958:Models, Molecular; D009119:Muscle Contraction / Q000187:drug effects; D011487:Protein Conformation; D013329:Structure-Activity Relationship
chemical_list: D004745:Enkephalins; D004744:Enkephalin, Methionine; D004743:Enkephalin, Leucine