title: Comparison of dynorphin-selective Kappa receptors in mouse vas deferens and guinea pig ileum. Spare receptor fraction as a determinant of potency.
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D004399:Dynorphins; D004723:Endorphins / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D004743:Enkephalin, Leucine / Q000031:analogs & derivatives / Q000494:pharmacology; D016308:Enkephalin, Leucine-2-Alanine; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D008297:Male; D051379:Mice; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009270:Naloxone / Q000494:pharmacology; D009271:Naltrexone / Q000031:analogs & derivatives / Q000494:pharmacology; D011957:Receptors, Opioid / Q000187:drug effects*; D017473:Receptors, Opioid, kappa; D013329:Structure-Activity Relationship; D014649:Vas Deferens / Q000187:drug effects*
chemical_list: D004723:Endorphins; D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D009270:Naloxone; D004743:Enkephalin, Leucine; D009271:Naltrexone; D016308:Enkephalin, Leucine-2-Alanine; C017120:chlornaltrexamine; D004399:Dynorphins