Biology of opioid peptides.
D000818:Animals; D001519:Behavior / Q000187:drug effects; D004723:Endorphins / Q000032:analysis / Q000096:biosynthesis / Q000378:metabolism / Q000494:pharmacology / Q000502:physiology*; D004745:Enkephalins / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000502:physiology; D010907:Pituitary Hormones / Q000378:metabolism; D011957:Receptors, Opioid / Q000502:physiology; D014018:Tissue Distribution
D004723:Endorphins; D004745:Enkephalins; D010907:Pituitary Hormones; D011957:Receptors, Opioid