[Enkephalins].
D000302:Adrenal Cortex / Q000502:physiology; D000313:Adrenal Medulla / Q000502:physiology; D000818:Animals; D002417:Cattle; D004068:Digestive System Physiological Phenomena; D004285:Dogs; D004745:Enkephalins / Q000502:physiology*; D006801:Humans; D009424:Nervous System Physiological Phenomena; D010902:Pituitary Gland / Q000502:physiology; D011957:Receptors, Opioid / Q000502:physiology
D004745:Enkephalins; D011957:Receptors, Opioid
Enkefaliny.