Mass SpectrometryTandem Mass SpectrometrySpectrometry, Mass, Electrospray IonizationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationGas Chromatography-Mass SpectrometryInfant, NewbornChromatography, LiquidAnimals, NewbornChromatography, High Pressure LiquidTandem Repeat SequencesProteomicsMolecular Sequence DataSpectrometry, Mass, Secondary IonAmino Acid SequenceProteomeSpectrometry, Mass, Fast Atom BombardmentInfant, Newborn, DiseasesNeonatal ScreeningElectrophoresis, Gel, Two-DimensionalPeptidesDeuterium Exchange MeasurementMolecular StructureReproducibility of ResultsIsotope LabelingPeptide MappingReference StandardsCalibrationSensitivity and SpecificitySolid Phase ExtractionMagnetic Resonance SpectroscopyProteinsCarbohydrate SequenceLimit of DetectionDeuteriumIonsPeptide FragmentsBody Mass IndexSubstance Abuse DetectionMetabolomicsProtein BindingChromatography, Thin LayerBase SequenceChromatography, GasFourier AnalysisIndicators and ReagentsProtein Processing, Post-TranslationalTrypsinIsotopesElectrophoresis, Polyacrylamide GelCyclotronsGlycosylationPregnancyModels, MolecularSequence Analysis, ProteinCattlePolysaccharidesIsomerismAnalytic Sample Preparation MethodsMetabolomeTime FactorsOligosaccharidesMolecular WeightRecombinant ProteinsOxidation-ReductionElectrophoresis, CapillaryBacterial ProteinsChromatography, Reverse-PhaseComplex MixturesCarbohydrate ConformationIndicator Dilution TechniquesMetabolism, Inborn ErrorsBiological MarkersAlgorithmsBinding SitesProtein Structure, TertiaryBiotransformationOxygen IsotopesSequence Homology, Amino AcidGasesForensic MedicineChemical FractionationEscherichia coliMutationMicrochemistryHydrolysisDatabases, ProteinKineticsMinisatellite RepeatsStereoisomerismAtmospheric PressureProtein ConformationProtein Array AnalysisSpectrophotometry, AtomicChromatography, AffinityPhosphorylationNanotechnologySoftwareHydrogenSequence AlignmentCell Line