Chromatography, GasBenzene DerivativesChromatography, Thin LayerMass SpectrometryChromatography, High Pressure LiquidFatty AcidsPemolineTandem Mass SpectrometryGas Chromatography-Mass SpectrometryChromatography, LiquidSpectrometry, Mass, Electrospray IonizationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationGasesChromatography, AffinityFatty Acids, UnsaturatedChromatography, Ion ExchangeChromatography, GelChromatographyProteomicsMolecular Sequence DataAmino Acid SequenceSpectrometry, Mass, Secondary IonProteomeChromatography, Reverse-PhaseSpectrometry, Mass, Fast Atom BombardmentReproducibility of ResultsReference StandardsCalibrationMolecular WeightSpectrophotometry, UltravioletElectrophoresis, Polyacrylamide GelPeptidesIonic LiquidsSolid Phase ExtractionElectrophoresis, Gel, Two-DimensionalLimit of DetectionMolecular StructureMagnetic Resonance SpectroscopySensitivity and SpecificityIsotope LabelingPeptide MappingCarbohydrate SequenceIndicators and ReagentsPeptide FragmentsKineticsAmino AcidsCattleTrypsinChemical FractionationDrug StabilityBiotransformationProteinsDeuterium Exchange MeasurementAcetonitrilesHydrogen-Ion ConcentrationMicrochemistryOligosaccharidesMetabolomicsSubstance Abuse DetectionIsomerismHydrolysisStereoisomerismLiquid CrystalsSubstrate SpecificityProtein BindingChromatography, DEAE-CelluloseDeuterium