title: Regulation of agonist binding to opioid receptor types of sodium and GTP: relevance to receptor function.
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism; D006160:Guanosine Triphosphate / Q000494:pharmacology*; D007700:Kinetics; D011957:Receptors, Opioid / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D012964:Sodium / Q000494:pharmacology*
chemical_list: D011957:Receptors, Opioid; D006160:Guanosine Triphosphate; D012964:Sodium