Allosteric RegulationReceptor, Muscarinic M3Receptor, Muscarinic M1Receptors, MuscarinicReceptor, Muscarinic M2Muscarinic AntagonistsMuscarinic AgonistsReceptor, Muscarinic M4Allosteric SiteN-MethylscopolamineReceptor, Muscarinic M5DiaminesCarbacholParasympatholyticsGallamine TriethiodidePirenzepineAtropineDiphenylacetic AcidsCholinergic AgentsAcetylcholineCholinergic AgonistsThiadiazolesMuscarineDioxolanesScopolamine DerivativesPiperidinesScopolamine HydrobromideRadioligand AssayParasympathomimeticsCHO CellsDicyclomineBethanecholBiperidenOxotremorineMuscle, SmoothPilocarpineMethacholine ChlorideCricetinaeObidoxime ChlorideGuinea PigsKineticsDose-Response Relationship, DrugMaltaCricetulusPhthalimidesTracheaGTP-Binding ProteinsBinding, CompetitiveTacrineTropicamideDrug AgonismIleumGTP-Binding Protein alpha Subunits, Gq-G11Muscle ContractionGTP-Binding Protein alpha Subunits, Gi-GoLigandsBenztropinePhosphatidylinositolsProtein BindingIsatinGuanosine 5'-O-(3-Thiotriphosphate)Pertussis ToxinModels, MolecularInositol PhosphatesType C PhospholipasesBinding SitesCalciumVirulence Factors, BordetellaRats, Sprague-DawleyCholinergic FibersAlcuroniumPropylbenzilylcholine MustardHeart AtriaIsoindolesRGS ProteinsG Protein-Coupled Inwardly-Rectifying Potassium ChannelsBenzilatesProtein ConformationPatch-Clamp TechniquesTritiumArecoline