Tandem Mass SpectrometryMass SpectrometryComplex MixturesSpectrometry, Mass, Electrospray IonizationChromatography, LiquidSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationProteomicsChromatography, High Pressure LiquidGas Chromatography-Mass SpectrometryProteomeMolecular Sequence DataAmino Acid SequencePeptidesElectrophoresis, Gel, Two-DimensionalMolecular StructureReproducibility of ResultsSolid Phase ExtractionSpectrometry, Mass, Fast Atom BombardmentNeonatal ScreeningReference StandardsSpectrometry, Mass, Secondary IonPeptide MappingIonsTandem Repeat SequencesIsotope LabelingSensitivity and SpecificityCalibrationProteinsLimit of DetectionMetabolism, Inborn ErrorsChemical FractionationPeptide FragmentsCarbohydrate SequenceTrypsinSequence Analysis, ProteinIsomerismIndicators and ReagentsBiotransformationProtein Processing, Post-TranslationalMagnetic Resonance SpectroscopyDatabases, ProteinMetabolomicsAlgorithmsDeuteriumGasesIndicator Dilution TechniquesDNA AdductsDeuterium Exchange MeasurementCattleOligosaccharidesChromatography, Reverse-PhaseSubstance Abuse DetectionEnvironmental MonitoringElectrophoresis, Polyacrylamide GelSoftwarePhosphopeptidesChromatography, GasDried Blood Spot TestingProtein BindingIsotopesOxidation-ReductionChromatography, Thin LayerPolysaccharidesGlycosylationAcetonitrilesFourier AnalysisAtmospheric PressureOxygen IsotopesModels, ChemicalEnvironmental PollutantsHydrocarbonsNanotechnologyGlucuronidesPolycyclic CompoundsChemistry Techniques, AnalyticalBase SequenceMicrochemistryBiological MarkersAir PollutantsMolecular WeightBlood Specimen CollectionDrug StabilityModels, MolecularPlant ExtractsSpectroscopy, Fourier Transform InfraredAconitumAnalytic Sample Preparation MethodsCarnitineHydrolysisGlycopeptidesWater Pollutants, ChemicalTime FactorsAmino AcidsElectrophoresis, CapillaryGlycerophospholipidsEstersChromatography, Ion ExchangePaperBacterial ProteinsChromatography, Affinity