title: Heterogeneity and properties of opiate receptors.
mesh_terms: D000818:Animals; D001575:Benzomorphans / Q000378:metabolism; D001921:Brain / Q000378:metabolism; D004745:Enkephalins / Q000378:metabolism; D007700:Kinetics; D009020:Morphine / Q000378:metabolism; D009928:Organ Specificity; D051381:Rats; D011957:Receptors, Opioid / Q000502:physiology*; D013329:Structure-Activity Relationship
chemical_list: D001575:Benzomorphans; D004745:Enkephalins; D011957:Receptors, Opioid; D009020:Morphine