HydrogenHydrogen-Ion ConcentrationHydrogen BondingHydrogen PeroxideHydrogen SulfideBicarbonatesProtonsAcidosisAcid-Base EquilibriumCarbon DioxideAcidosis, RespiratoryBuffersHydrochloric AcidGastric Acidity DeterminationIon ChannelsGastric JuiceSodiumAcetazolamideAcidosis, Renal TubularAlkalosis, RespiratoryAmmonium ChlorideChloridesPotassiumKineticsHelix (Snails)Partial PressureTurtlesSodium BicarbonateFree RadicalsCalciumSecretory RateBiological Transport, ActiveWaterAcidsMembrane PotentialsOxygenHypercapniaLactatesSodium-Hydrogen AntiporterCell Membrane PermeabilityModels, ChemicalOsmolar ConcentrationGastric MucosaPhosphatesPotassium ChlorideModels, MolecularDinitrophenolsTime FactorsPentagastrinIon TransportIonophoresExtracellular SpaceSulfatesIon Channel GatingGastric AcidDepression, ChemicalTemperatureHydrogen CyanideDogsEnzymesAbsorptionElectrophysiologyAmilorideOxidation-ReductionModels, BiologicalHeavy IonsUrinary BladderSodium ChlorideOxygen ConsumptionOxidantsThermodynamicsBiological TransportMolecular Sequence DataCrystallography, X-RayBinding SitesCatalaseDeuterium Exchange MeasurementRats, Inbred StrainsCatsProtein ConformationMolecular StructureAmino Acid SequenceMagnetic Resonance SpectroscopyFree Radical ScavengersNeuronsCatalysisCystathionine gamma-LyaseGasesProtein BindingMass SpectrometryMetalsMolecular ConformationPeroxidasesSpectrometry, Mass, Electrospray IonizationHydrogenaseIon ExchangeHydroxyl RadicalProtein Structure, SecondaryMagnesiumSulfides