title: Conformations of opioid peptides as determined by nuclear magnetic resonance and related spectroscopies.
mesh_terms: D004723:Endorphins; D004745:Enkephalins; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D011487:Protein Conformation; D013057:Spectrum Analysis / Q000379:methods; D013329:Structure-Activity Relationship
chemical_list: D004723:Endorphins; D004745:Enkephalins