title: Conformational analysis of opioid peptides and the use of conformational restriction in the design of selective analogs.
mesh_terms: D004723:Endorphins; D004745:Enkephalins; D009682:Magnetic Resonance Spectroscopy; D011487:Protein Conformation; D012107:Research Design; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D004723:Endorphins; D004745:Enkephalins