title: Opioid agonist activity of beta-lipotropin fragments: a possible biological source of morphine-like substances in the pituitary.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001681:Biological Assay; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects / Q000502:physiology; D009020:Morphine / Q000494:pharmacology*; D009022:Morphine Derivatives / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D009270:Naloxone / Q000494:pharmacology; D010446:Peptide Fragments / Q000502:physiology; D010902:Pituitary Gland / Q000502:physiology*; D013329:Structure-Activity Relationship; D013552:Swine; D014357:Trypsin; D008083:beta-Lipotropin / Q000494:pharmacology / Q000502:physiology*
chemical_list: D009022:Morphine Derivatives; D010446:Peptide Fragments; D009270:Naloxone; D009020:Morphine; D008083:beta-Lipotropin; D014357:Trypsin