title: Comparison between narcotic "receptors" in the guinea-pig ileum and the rat brain.
mesh_terms: D000818:Animals; D001665:Binding Sites; D001921:Brain / Q000378:metabolism*; D005260:Female; D006168:Guinea Pigs; D004091:Hydromorphone / Q000378:metabolism; D007082:Ileum / Q000378:metabolism*; D066298:In Vitro Techniques; D008297:Male; D009294:Narcotics / Q000378:metabolism*; D051381:Rats; D011955:Receptors, Drug
chemical_list: D009294:Narcotics; D011955:Receptors, Drug; D004091:Hydromorphone