title: Development of the concepts of opiate receptors and their ligands.
mesh_terms: D000818:Animals; D002621:Chemistry; D004361:Drug Tolerance; D004723:Endorphins / Q000378:metabolism; D004745:Enkephalins / Q000378:metabolism / Q000502:physiology; D006168:Guinea Pigs; D049673:History, 20th Century; D006801:Humans; D066298:In Vitro Techniques; D008024:Ligands; D008297:Male; D051379:Mice; D009482:Neurophysiology / Q000266:history*; D010455:Peptides / Q000378:metabolism / Q000502:physiology; D051381:Rats; D011957:Receptors, Opioid / Q000378:metabolism / Q000502:physiology*; D013045:Species Specificity; D013329:Structure-Activity Relationship; D019966:Substance-Related Disorders / Q000503:physiopathology; D014018:Tissue Distribution; D014649:Vas Deferens / Q000187:drug effects
chemical_list: D004723:Endorphins; D004745:Enkephalins; D008024:Ligands; D010455:Peptides; D011957:Receptors, Opioid