Ion ChannelsIon TransportIon Channel GatingHeavy IonsSpectrometry, Mass, Secondary IonIon PumpsIon ExchangeMetalsPotassiumSodiumSpectrometry, Mass, Electrospray IonizationCalciumMagnesiumHydrogen-Ion ConcentrationCationsKineticsChloridesMembrane PotentialsLigand-Gated Ion ChannelsZincModels, MolecularMass SpectrometryCobaltHeavy Ion RadiotherapyManganeseMolecular Sequence DataIon Exchange ResinsChromatography, Ion ExchangeBinding SitesAmino Acid SequenceCations, MonovalentGasesCopperElectric ConductivityProtonsAnionsWaterProtein ConformationMetals, AlkaliModels, ChemicalTandem Mass SpectrometryPotassium ChannelsSodium ChannelsCell Membrane PermeabilityElectrochemistryLithiumNickelRubidiumPatch-Clamp TechniquesCyclotronsElectrophysiologyMolecular StructureCell MembraneMetals, Alkaline EarthCadmiumQuaternary Ammonium CompoundsIon-Selective ElectrodesGramicidinProtein BindingThermodynamicsMetals, Rare EarthStatic ElectricityModels, BiologicalPeptidesCrystallography, X-RayBiological Transport, ActiveBiological TransportSolutionsChelating AgentsCesiumSodium-Potassium-Exchanging ATPaseEdetic AcidTemperatureProtein Structure, TertiaryAdenosine TriphosphateLipid BilayersCatalysisSodium ChlorideOsmolar ConcentrationMetals, HeavySilverXenopus laevisPhosphatesMagnetic Resonance SpectroscopyGas Chromatography-Mass SpectrometryFourier AnalysisSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationStrontiumBariumCattleSaltsEscherichia coliLinear Energy TransferCalcium ChannelsMathematicsTime FactorsComputer SimulationPotentiometryMolecular ConformationSubstrate Specificity