ProtonsProton PumpsProton Pump InhibitorsPositron-Emission TomographyOtoacoustic Emissions, SpontaneousTomography, Emission-ComputedMagnetic Resonance SpectroscopyHydrogen-Ion ConcentrationVehicle EmissionsFluorodeoxyglucose F18RadiopharmaceuticalsTomography, Emission-Computed, Single-PhotonProton-Motive ForceSpectrometry, FluorescenceKineticsGreenhouse EffectFluorine RadioisotopesBacteriorhodopsinsWaterProton-Translocating ATPasesAspartic AcidCarbon FootprintBrainModels, MolecularMethaneAir PollutantsVacuolar Proton-Translocating ATPasesProtein ConformationMagnetic Resonance ImagingCreatineHydrogenMultimodal ImagingElectron Transport Complex IVTomography, X-Ray ComputedAtmosphereCarbon RadioisotopesFluorescent DyesVolatilizationDicyclohexylcarbodiimideElectron TransportPhotonsOxidation-ReductionHydrogen BondingCholinePentanesModels, ChemicalLightFluorescenceValinomycinEnvironmental Monitoring2-PyridinylmethylsulfinylbenzimidazolesTemperatureSchiff BasesSensitivity and SpecificityGasesBinding SitesGasolineCarbon DioxideFossil FuelsElectronsSpectrometry, X-Ray EmissionTime FactorsRhodobacter sphaeroidesVolatile Organic CompoundsThermodynamicsHistidineOmeprazoleLuminescenceBiological TransportPower PlantsModels, BiologicalOxygenCoalHalobacterium salinarumDeuteriumDenitrificationImage Processing, Computer-AssistedCerebrovascular CirculationMolecular StructureCarbonMolecular Sequence DataModels, TheoreticalHalobacteriumPhantoms, ImagingNitrous OxideAdenosine TriphosphateEscherichia coliSpectrophotometryEnergy TransferElectrochemistryAnti-Ulcer AgentsNigericinLuminescent MeasurementsArylsulfonatesMembrane PotentialsAmino Acid SequenceQuantum TheoryIon ChannelsReproducibility of ResultsCatalysis