Isotope LabelingDeuteriumIsotopesDeuterium OxideDeuterium Exchange MeasurementHydrogenOxygen IsotopesNitrogen IsotopesCarbon IsotopesHydrogen BondingHydrogen PeroxideHydrogen SulfideZinc IsotopesMass SpectrometrySulfur IsotopesIron IsotopesRadioisotope Dilution TechniqueIndicator Dilution TechniquesKineticsMagnetic Resonance SpectroscopyBody WaterStrontium IsotopesWaterModels, MolecularOxidation-ReductionGas Chromatography-Mass SpectrometryModels, ChemicalSpectrometry, Mass, Electrospray IonizationCatalysisProtein ConformationHydrogen-Ion ConcentrationProtonsMolecular ConformationMolecular Sequence DataSolventsMolecular StructureAmidesThermodynamicsAmino Acid SequenceStereoisomerismNuclear Magnetic Resonance, BiomolecularTemperatureGasesBinding SitesMeteoroidsChromatography, LiquidMercury IsotopesCarbonProtein Structure, SecondaryCarbon-Carbon LyasesEvolution, PlanetaryBody Fluid CompartmentsSubstrate SpecificityProtein BindingTandem Mass SpectrometryHydrogen CyanideTritiumSpectroscopy, Fourier Transform InfraredPeptidesCrystallography, X-RayOxygenRadioisotopes