Membrane PotentialsAction PotentialsMicroelectrodesElectrophysiologyIon ChannelsComputer SimulationCell MembraneMembrane Potential, MitochondrialIntracellular MembranesMembranesCalciumPotassiumPatch-Clamp TechniquesMembrane LipidsSodiumPotassium ChannelsElectric ConductivityTetrodotoxinElectric StimulationMembranes, ArtificialNeuronsCell Membrane PermeabilityGuinea PigsMolecular Sequence DataAmino Acid SequenceTime FactorsSodium ChannelsMitochondriaErythrocyte MembraneMembrane FluidityCells, CulturedProtein Structure, TertiaryCell LineChloridesIon Channel GatingCystic Fibrosis Transmembrane Conductance RegulatorKineticsMembrane ProteinsModels, BiologicalHeartNeural ConductionPotassium Channel BlockersTetraethylammonium CompoundsHydrogen-Ion ConcentrationMembrane Transport Proteins4-AminopyridineVentricular FunctionAxonsSynaptic TransmissionMutationRats, Sprague-DawleyMitochondrial MembranesSynapsesAdenosine TriphosphateFluorescent DyesRabbitsLipid BilayersCalcium ChannelsHeart Conduction SystemMembrane GlycoproteinsValinomycinBasement MembraneTetraethylammoniumDogsProtein TransportDendritesPurkinje FibersPyramidal CellsPapillary MusclesPotassium Channels, Voltage-GatedProtein Structure, SecondaryProtein BindingDose-Response Relationship, DrugHeart VentriclesRats, WistarBariumModels, MolecularRecombinant Fusion ProteinsIon TransportBiological Transport, ActiveCarrier ProteinsCalcium SignalingMyocytes, CardiacSignal TransductionMicroscopy, ElectronSodium Channel BlockersProtein ConformationModels, NeurologicalMyocardiumEvoked PotentialsBase SequenceCesiumCalcium Channel BlockersMicroscopy, FluorescenceExcitatory Postsynaptic PotentialsSequence Homology, Amino AcidOuabainAnuraCytoplasmEndoplasmic Reticulum