title: [Trends in the study of opioid peptides].
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004723:Endorphins / Q000302:isolation & purification / Q000502:physiology; D004745:Enkephalins; D010455:Peptides / Q000032:analysis; D010908:Pituitary Hormones, Anterior; D011333:Pro-Opiomelanocortin; D011498:Protein Precursors
chemical_list: D004723:Endorphins; D004745:Enkephalins; D010455:Peptides; D010908:Pituitary Hormones, Anterior; D011498:Protein Precursors; C029992:proenkephalin; C019448:kyotorphin; D011333:Pro-Opiomelanocortin; C033660:preproenkephalin