DeuteriumDeuterium Exchange MeasurementHydrogenDeuterium OxideMass SpectrometryIsotopesIsotope LabelingHydrogen BondingSpectrometry, Mass, Electrospray IonizationModels, MolecularHydrogen PeroxideAmidesProtein ConformationOxygen IsotopesNitrogen IsotopesPepsin ASpectroscopy, Fourier Transform InfraredCarbon IsotopesGasesHydrogen SulfideProtein Structure, SecondaryMagnetic Resonance SpectroscopyKineticsAmino Acid SequenceMolecular Sequence DataSolventsCyclotronsProtein Structure, TertiaryFourier AnalysisPeptidesProtein UnfoldingNuclear Magnetic Resonance, BiomolecularMolecular ConformationProtein FoldingThermodynamicsProtein BindingModels, ChemicalLigandsSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationProtonsPeptide FragmentsChromatography, Reverse-PhaseMyoglobinPeptide MappingProtein Structure, QuaternaryMolecular StructureSpectrophotometry, InfraredProtein StabilityBody WaterCrystallography, X-RayProteinsIndicator Dilution TechniquesBinding SitesAllosteric SiteRadioisotope Dilution TechniqueProtein DenaturationZinc IsotopesCircular DichroismHydrogen-Ion ConcentrationWaterCatalytic DomainSulfur IsotopesRecombinant ProteinsProtein MultimerizationAmyloidOxidation-ReductionCattleIron IsotopesChromatography, High Pressure LiquidCatalysisEscherichia coliGas Chromatography-Mass SpectrometryStrontium IsotopesSwineStereoisomerismAlgorithmsTemperatureHydrogen CyanideBody Fluid CompartmentsMethenamineSubstrate SpecificityLipid BilayersCarbon-Carbon Lyases