title: Opioid peptides have found their roots.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D004399:Dynorphins; D004723:Endorphins / Q000145:classification / Q000502:physiology; D004745:Enkephalins / Q000502:physiology; D011498:Protein Precursors / Q000378:metabolism; D013552:Swine; D001615:beta-Endorphin / Q000031:analogs & derivatives*
chemical_list: D004723:Endorphins; D004745:Enkephalins; D011498:Protein Precursors; D001615:beta-Endorphin; D004399:Dynorphins; C030719:beta-neo-endorphin