Tandem Mass SpectrometryMass SpectrometrySpectrometry, Mass, Electrospray IonizationChromatography, LiquidPeptidesSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationChromatography, High Pressure LiquidProteomicsGas Chromatography-Mass SpectrometryProteomeAmino Acid SequenceMolecular Sequence DataPeptide FragmentsPeptide MappingSpectrometry, Mass, Fast Atom BombardmentElectrophoresis, Gel, Two-DimensionalSolid Phase ExtractionNeonatal ScreeningMolecular StructureReproducibility of ResultsSpectrometry, Mass, Secondary IonReference StandardsTandem Repeat SequencesCalibrationIsotope LabelingIonsSensitivity and SpecificityLimit of DetectionMetabolism, Inborn ErrorsSequence Analysis, ProteinProteinsTrypsinPeptide LibraryProtein BindingIndicators and ReagentsDatabases, ProteinProtein Processing, Post-TranslationalComplex MixturesPeptides, CyclicDeuteriumChemical FractionationDeuterium Exchange MeasurementIndicator Dilution TechniquesIsomerismChromatography, Reverse-PhaseMagnetic Resonance SpectroscopyModels, MolecularSubstance Abuse DetectionAntimicrobial Cationic PeptidesCarbohydrate SequenceOligopeptidesElectrophoresis, Polyacrylamide GelAlgorithmsCattleIsotopesDried Blood Spot TestingBinding SitesBiotransformationFourier AnalysisBase SequenceSoftwarePhosphopeptidesOxygen IsotopesAtmospheric PressureAcetonitrilesMetabolomicsGlycosylationSequence Homology, Amino AcidGlucuronidesMicrochemistryGasesMolecular WeightRecombinant ProteinsOxidation-ReductionBlood Specimen CollectionDrug StabilityOligosaccharidesAnalytic Sample Preparation MethodsProtein ConformationAmino AcidsAconitumModels, ChemicalProtein Structure, TertiaryCarnitineBacterial ProteinsBiological MarkersElectrophoresis, CapillaryHydrolysisCell LineKineticsPolysaccharidesGlycerophospholipidsLysineSequence AlignmentPaperSpectroscopy, Fourier Transform InfraredPhosphorylationCarbohydrate ConformationCysteineImmunoassay