title: The role of dynorphin in narcotic tolerance mechanisms.
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004361:Drug Tolerance; D004399:Dynorphins / Q000502:physiology*; D006801:Humans; D066298:In Vitro Techniques; D009294:Narcotics / Q000494:pharmacology*; D009293:Opioid-Related Disorders / Q000378:metabolism; D011957:Receptors, Opioid / Q000378:metabolism
chemical_list: D009294:Narcotics; D011957:Receptors, Opioid; C030738:dynorphin receptor; D004399:Dynorphins