Tandem Mass SpectrometryMass SpectrometrySpectrometry, Mass, Electrospray IonizationChromatography, LiquidSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationChromatography, High Pressure LiquidProteomicsGas Chromatography-Mass SpectrometryProteomeMolecular Sequence DataAmino Acid SequencePeptidesSolid Phase ExtractionElectrophoresis, Gel, Two-DimensionalSpectrometry, Mass, Fast Atom BombardmentNeonatal ScreeningSpectrometry, Mass, Secondary IonReproducibility of ResultsMolecular StructureReference StandardsTandem Repeat SequencesCalibrationPeptide MappingMetabolism, Inborn ErrorsLimit of DetectionIsotope LabelingSensitivity and SpecificityIonsSequence Analysis, ProteinProteinsDatabases, ProteinIndicators and ReagentsComplex MixturesIndicator Dilution TechniquesPeptide FragmentsDeuteriumDeuterium Exchange MeasurementChemical FractionationSubstance Abuse DetectionTrypsinChromatography, Reverse-PhaseIsomerismProtein Processing, Post-TranslationalCarbohydrate SequenceDried Blood Spot TestingIsotopesBiotransformationAlgorithmsFourier AnalysisAtmospheric PressureMetabolomicsAcetonitrilesOxygen IsotopesMagnetic Resonance SpectroscopyGlucuronidesSoftwareBlood Specimen CollectionMicrochemistryAconitumProtein BindingPhosphopeptidesElectrophoresis, Polyacrylamide GelGasesAnalytic Sample Preparation MethodsCarnitineOligosaccharidesCattleOxidation-ReductionDrug StabilityGlycosylationGlycerophospholipidsElectrophoresis, CapillaryPaperPolysaccharidesCarbohydrate ConformationBiological MarkersModels, MolecularDNA AdductsModels, ChemicalDrug ResiduesImmunoassayNanotechnologyChromatography, Thin LayerStereoisomerismSpectroscopy, Fourier Transform InfraredLysineMolecular WeightVeterinary DrugsChromatography, GasBacterial ProteinsBase SequenceCyclotronsHydrolysisBinding SitesCysteineMetabolomeSequence Homology, Amino AcidPhosphorylationRecombinant ProteinsAldehydes