ProtonsProton PumpsProton Pump InhibitorsMagnetic Resonance SpectroscopyHydrogen-Ion ConcentrationModels, MolecularProton-Motive ForceSpectrometry, Mass, Fast Atom BombardmentKineticsHydrogen BondingHydrogenProtein ConformationWaterBacteriorhodopsinsAspartic AcidModels, ChemicalProton-Translocating ATPasesOxidation-ReductionBinding SitesMolecular StructureCrystallography, X-RayMolecular ConformationVacuolar Proton-Translocating ATPasesElectron Transport Complex IVCreatineDeuteriumThermodynamicsElectron TransportElectronsCatalysisDicyclohexylcarbodiimideMolecular Sequence DataAmino Acid SequenceHistidineQuantum TheoryValinomycinSchiff Bases2-PyridinylmethylsulfinylbenzimidazolesCholineEscherichia coliStructure-Activity RelationshipElectrochemistryRhodobacter sphaeroidesElectron Spin Resonance SpectroscopyOxygenSpectrophotometryOmeprazoleHalobacteriumHemeChemistryStatic ElectricityMass SpectrometryNuclear Magnetic Resonance, BiomolecularHalobacterium salinarumStereoisomerismSolutionsOxygen IsotopesChemical PhenomenaSpectrum AnalysisIonsBiological TransportAdenosine TriphosphateZincAnti-Ulcer AgentsNigericinProtein BindingArylsulfonatesIon ChannelsTemperatureDeuterium OxideMembrane PotentialsProtein Structure, SecondaryIon TransportLightCatalytic DomainSulfurNeutronsBiological Transport, ActiveSolventsX-Ray DiffractionCarbonyl Cyanide p-TrifluoromethoxyphenylhydrazoneComputer SimulationBacterial ProteinsCattleMutagenesis, Site-DirectedSubstrate SpecificityPurple MembraneCell MembraneSulfoxidesIronMutationAcidsProtein Structure, TertiaryCopperRhodopsins, MicrobialGramicidinModels, BiologicalChemistry, PhysicalMathematicsHistamine H2 Antagonists