title: Molecular conformations of Met-enkephalin: comparison of the zwitterionic and cationic forms.
mesh_terms: D004745:Enkephalins; D007477:Ions; D009682:Magnetic Resonance Spectroscopy; D009842:Oligopeptides; D011487:Protein Conformation
chemical_list: D004745:Enkephalins; D007477:Ions; D009842:Oligopeptides