Opioid peptides.
D000700:Analgesics / Q000494:pharmacology; D000818:Animals; D001921:Brain / Q000187:drug effects; D001923:Brain Chemistry; D055598:Chemical Phenomena; D002621:Chemistry; D004064:Digestive System / Q000032:analysis; D004569:Electroencephalography; D004723:Endorphins / Q000032:analysis* / Q000494:pharmacology; D004745:Enkephalins / Q000032:analysis; D006801:Humans; D009020:Morphine / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D010455:Peptides / Q000032:analysis*; D011957:Receptors, Opioid / Q000032:analysis*; D013116:Spinal Cord / Q000032:analysis; D019966:Substance-Related Disorders; D008083:beta-Lipotropin / Q000032:analysis
D000700:Analgesics; D004723:Endorphins; D004745:Enkephalins; D010455:Peptides; D011957:Receptors, Opioid; D009270:Naloxone; D009020:Morphine; D008083:beta-Lipotropin