title: Selectivity of dynorphin for kappa opioid receptors.
mesh_terms: D000818:Animals; D001665:Binding Sites; D001921:Brain / Q000187:drug effects; D004399:Dynorphins; D004723:Endorphins / Q000494:pharmacology*; D006168:Guinea Pigs; D009271:Naltrexone / Q000031:analogs & derivatives / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology; D011957:Receptors, Opioid / Q000187:drug effects*; D017473:Receptors, Opioid, kappa
chemical_list: D004723:Endorphins; D009292:Narcotic Antagonists; D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D009271:Naltrexone; C017120:chlornaltrexamine; D004399:Dynorphins