ProtonsHydrogenHydrogen BondingHydrogen PeroxideProton PumpsHydrogen SulfideProton Pump InhibitorsMagnetic Resonance SpectroscopyHydrogen-Ion ConcentrationModels, MolecularProton-Motive ForceOxidation-ReductionKineticsWaterProtein ConformationHydrogen CyanideModels, ChemicalAspartic AcidBacteriorhodopsinsThermodynamicsCrystallography, X-RayBinding SitesProton-Translocating ATPasesCatalysisOxidantsCatalaseMolecular Sequence DataMolecular StructureElectron TransportDeuterium Exchange MeasurementAmino Acid SequenceElectron Transport Complex IVMolecular ConformationHydrogenaseVacuolar Proton-Translocating ATPasesHistidineOxygenCreatineEscherichia coliCystathionine gamma-LyaseDicyclohexylcarbodiimideElectrochemistryTemperatureNuclear Magnetic Resonance, BiomolecularProtein Structure, SecondaryElectronsPeroxidasesSchiff BasesRhodobacter sphaeroidesStatic ElectricityQuantum TheoryMutationValinomycinDeuterium OxideCholineProtein BindingSulfides2-PyridinylmethylsulfinylbenzimidazolesSolventsSolutionsBacterial ProteinsElectron Spin Resonance SpectroscopySpectrophotometryMutagenesis, Site-DirectedGasesHalobacterium salinarumStructure-Activity RelationshipCatalytic DomainHydroxidesLightFree RadicalsHemeAdenosine TriphosphateIonsOmeprazoleStereoisomerismReactive Oxygen SpeciesBiological TransportCattleSpectroscopy, Fourier Transform InfraredProtein Structure, TertiaryHalobacteriumMembrane PotentialsHydroxyl RadicalIon ChannelsOxidoreductasesNigericinAcidsMass SpectrometryModels, BiologicalIon TransportAnaerobiosisNeutronsAmidesAnti-Ulcer AgentsComputer SimulationMethaneBreath TestsArylsulfonatesSubstrate Specificity