DeuteriumDeuterium OxideDeuterium Exchange MeasurementHydrogenBody WaterMass SpectrometryMagnetic Resonance SpectroscopyIndicator Dilution TechniquesWaterKineticsIsotope LabelingSpectrometry, Mass, Electrospray IonizationIsotopesModels, MolecularRadioisotope Dilution TechniqueOxygen IsotopesAmidesMolecular ConformationProtein ConformationMethenamineBody Fluid CompartmentsSolventsModels, ChemicalMolecular Sequence DataStereoisomerismOxidation-ReductionHydrogen-Ion ConcentrationLipid BilayersGas Chromatography-Mass SpectrometryProtonsDimyristoylphosphatidylcholineTemperatureGasesThermodynamicsCatalysisSpectroscopy, Fourier Transform InfraredNuclear Magnetic Resonance, BiomolecularAmino Acid SequenceMolecular StructureGroup IA Phospholipases A2Pepsin AProtein Structure, SecondaryBody CompositionHydrogen BondingGastrointestinal ContentsPhosphatidylcholinesFourier AnalysisChromatography, High Pressure LiquidPeptides1,2-DipalmitoylphosphatidylcholineFatty AcidsSpectrophotometry, InfraredNeutron DiffractionElectric ImpedanceProtein BindingNitrogen IsotopesBinding SitesCarbon-Carbon LyasesPhase TransitionCattle