EpitestosteroneCarbon IsotopesEtiocholanoloneMass SpectrometryGas Chromatography-Mass SpectrometryDoping in SportsBreath TestsTandem Mass SpectrometrySpectrometry, Mass, Electrospray IonizationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationNitrogen IsotopesChromatography, LiquidChromatography, High Pressure LiquidCarbon DioxideProteomicsSpectrometry, Mass, Secondary IonProteomeMolecular Sequence DataAmino Acid SequenceSpectrometry, Mass, Fast Atom BombardmentElectrophoresis, Gel, Two-DimensionalDeuterium Exchange MeasurementPeptidesIsotope LabelingMolecular StructurePeptide MappingReproducibility of ResultsReference StandardsCalibrationMagnetic Resonance SpectroscopySolid Phase ExtractionDeuteriumCarbohydrate SequenceSensitivity and SpecificityLimit of DetectionProteinsIonsBody Mass IndexMetabolomicsPeptide FragmentsSubstance Abuse DetectionChromatography, Thin LayerChromatography, GasFourier AnalysisCyclotronsIndicators and ReagentsProtein Processing, Post-TranslationalIsotopesAnalytic Sample Preparation MethodsProtein BindingTrypsinMetabolomeElectrophoresis, Polyacrylamide GelPolysaccharidesGlycosylationOligosaccharidesCarbohydrate ConformationMolecular WeightSequence Analysis, ProteinIsomerismChromatography, Reverse-PhaseOxidation-ReductionIndicator Dilution TechniquesCattleElectrophoresis, CapillaryModels, MolecularComplex MixturesBiotransformationOxygen IsotopesGases