Hydrochloric AcidCarboxylic AcidsAmino AcidsPneumonia, AspirationAmino Acids, CyclicNitric AcidSequence Homology, Amino AcidGastric JuiceHydrogen-Ion ConcentrationTrifluoroacetic AcidDecalcification TechniqueCountercurrent DistributionAmino Acid SequenceAcidsEsophagusFluoroacetatesAmino Acid SubstitutionStomachCloning, MolecularStructure-Activity RelationshipMolecular StructureSulfuric AcidsAchlorhydriaParietal Cells, GastricGastric AcidChromatography, High Pressure LiquidGastric FistulaPepsin AGastric MucosaSodium HydroxideGas Chromatography-Mass SpectrometryHydrolysisKineticsPentagastrinAlkalosisChemistryStereoisomerismMolecular Sequence DataEstersEthylenesAppendixMagnetic Resonance SpectroscopyAcidosisDuodenumEscherichia coliAmino Acid Transport SystemsSodium ChlorideSpectrophotometry, UltravioletAzetidinecarboxylic AcidAmino Acids, EssentialBinding SitesBase SequenceModels, MolecularMutationAcetatesSequence AlignmentPyrrolidonecarboxylic AcidSubstrate SpecificitySpectrophotometry, AtomicProlineSecretinBicarbonatesAzetinesLeucineRabbitsStomach UlcerTemperatureMutagenesis, Site-DirectedPhenazinesRecombinant ProteinsDogsProtein ConformationAmino Acid MotifsTime FactorsSwineProtein BindingAmino Acids, SulfurLyasesDNA, ComplementaryBacterial ProteinsCell LinePeptide FragmentsWaterSpectrophotometry, InfraredPeptidesMass SpectrometrySequence Homology, Nucleic AcidMolecular WeightChemical PhenomenaIndicators and ReagentsProtein Structure, TertiaryCatalysis