title: Isolation and structure identification of a morphine-like peptide "enkephalin" in bovine brain.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001923:Brain Chemistry; D002417:Cattle; D008024:Ligands; D009419:Nerve Tissue Proteins / Q000302:isolation & purification*; D009842:Oligopeptides / Q000302:isolation & purification*; D011955:Receptors, Drug; D013329:Structure-Activity Relationship
chemical_list: D008024:Ligands; D009419:Nerve Tissue Proteins; D009842:Oligopeptides; D011955:Receptors, Drug