Hydrochloric AcidCarboxylic AcidsAmino AcidsPneumonia, AspirationAmino Acids, CyclicNitric AcidSequence Homology, Amino AcidGastric JuiceHydrogen-Ion ConcentrationTrifluoroacetic AcidDecalcification TechniqueCountercurrent DistributionAcidsAmino Acid SequenceEsophagusFluoroacetatesStomachAmino Acid SubstitutionCloning, MolecularAchlorhydriaParietal Cells, GastricGastric AcidSulfuric AcidsGastric FistulaPepsin AGastric MucosaSodium HydroxideChromatography, High Pressure LiquidPentagastrinAlkalosisHydrolysisGas Chromatography-Mass SpectrometryStructure-Activity RelationshipAppendixAcidosisEthylenesMolecular StructureDuodenumAmino Acid Transport SystemsAzetidinecarboxylic AcidSodium ChlorideAmino Acids, EssentialKineticsChemistryEstersMolecular Sequence DataPyrrolidonecarboxylic AcidAcetatesSequence AlignmentEscherichia coliBinding SitesBase SequenceStereoisomerismSpectrophotometry, UltravioletMutationSpectrophotometry, AtomicModels, MolecularSecretinBicarbonatesAzetinesProlineStomach UlcerLeucineMagnetic Resonance SpectroscopySubstrate SpecificityPhenazinesAmino Acid MotifsMutagenesis, Site-DirectedRabbitsTemperatureDogsAmino Acids, SulfurRecombinant ProteinsLyasesSwineDNA, ComplementaryProtein ConformationTime FactorsWaterPeptide FragmentsSequence Homology, Nucleic AcidProtein Binding