title: Agonist-antagonist interactions with rat atrial muscarinic cholinergic receptor sites: differential regulation by guanine nucleotides.
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D002217:Carbachol / Q000494:pharmacology; D004347:Drug Interactions; D006150:Guanine Nucleotides / Q000494:pharmacology*; D006160:Guanosine Triphosphate / Q000494:pharmacology; D006321:Heart / Q000187:drug effects*; D066298:In Vitro Techniques; D010276:Parasympatholytics / Q000494:pharmacology*; D010277:Parasympathomimetics / Q000494:pharmacology*; D051381:Rats; D011950:Receptors, Cholinergic / Q000187:drug effects*; D011976:Receptors, Muscarinic / Q000187:drug effects*
chemical_list: D006150:Guanine Nucleotides; D010276:Parasympatholytics; D010277:Parasympathomimetics; D011950:Receptors, Cholinergic; D011976:Receptors, Muscarinic; D001285:Atropine; D006160:Guanosine Triphosphate; D002217:Carbachol