title: NMR rotating frame relaxation studies of intramolecular motion in peptides. Tyrosine ring motion in methionine-enkephalin.
mesh_terms: D004723:Endorphins; D004745:Enkephalins; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D011487:Protein Conformation; D014443:Tyrosine
chemical_list: D004723:Endorphins; D004745:Enkephalins; D014443:Tyrosine