DeuteriumHydrogenDeuterium OxideDeuterium Exchange MeasurementMass SpectrometryMagnetic Resonance SpectroscopyBody WaterModels, MolecularIsotope LabelingKineticsWaterIndicator Dilution TechniquesOxygen IsotopesSpectrometry, Mass, Electrospray IonizationMolecular ConformationProtein ConformationIsotopes