title: Enkephalin related fragments. Conformational studies of the tetrapeptides Tyr-Gly-Gly-Phe and Gly-Gly-Phe-X (X = Leu, Met) by X-ray and 1H NMR spectroscopy.
mesh_terms: D004723:Endorphins; D004745:Enkephalins; D009682:Magnetic Resonance Spectroscopy; D009842:Oligopeptides; D011487:Protein Conformation; D014961:X-Ray Diffraction
chemical_list: D004723:Endorphins; D004745:Enkephalins; D009842:Oligopeptides