title: [Opioid peptides].
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle; D004723:Endorphins / Q000032:analysis* / Q000096:biosynthesis; D004745:Enkephalins / Q000032:analysis / Q000235:genetics; D005786:Gene Expression Regulation; D011333:Pro-Opiomelanocortin / Q000032:analysis; D011498:Protein Precursors / Q000032:analysis / Q000235:genetics; D001615:beta-Endorphin
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011498:Protein Precursors; D001615:beta-Endorphin; D011333:Pro-Opiomelanocortin; C033660:preproenkephalin