Spectrometry, Mass, Electrospray IonizationMass SpectrometryTandem Mass SpectrometryChromatography, High Pressure LiquidChromatography, LiquidMolecular StructureSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationCyclotronsGasesCalibrationMolecular Sequence DataIonsAmino Acid SequenceComplex MixturesElectrophoresis, CapillaryGlycerophospholipidsFourier AnalysisAtmospheric PressureSpectrometry, Mass, Fast Atom BombardmentReference StandardsReproducibility of ResultsIndicators and ReagentsCarbohydrate SequenceGas Chromatography-Mass SpectrometryNanotechnologySensitivity and SpecificityIsomerismDeuteriumSolventsLimit of DetectionSolutionsPeptidesModels, ChemicalMyoglobinSpectrometry, Mass, Secondary IonSolid Phase ExtractionMagnetic Resonance SpectroscopyElectrochemistryAcetonitrilesProteinsPeptide MappingMolecular WeightMicrochemistryGlycerylphosphorylcholineChromatography, Reverse-PhaseCapillary ActionOligosaccharidesSpectroscopy, Fourier Transform InfraredPeptide FragmentsTrypsinDeuterium Exchange MeasurementCarbohydrate ConformationExplosive AgentsSpectrophotometry, UltravioletBenzyl AlcoholsCapillary ElectrochromatographyHydrogen-Ion ConcentrationMonosaccharidesTerphenyl CompoundsAir IonizationHydrogenPolysaccharidesOxidation-ReductionModels, MolecularMetals, AlkaliProtein ConformationSubstance Abuse DetectionSulfoglycosphingolipidsSequence AnalysisHydrolysisCattleMetalsProteomicsMetabolomicsStereoisomerismPhase TransitionDrug StabilityDisaccharidesPlasmalogensRecombinant ProteinsGlucuronidesMethanolGlycosylationEscherichia coliDisulfidesPhospholipidsCrown EthersMuramidaseForensic SciencesKineticsEquipment DesignVolatilizationCoordination ComplexesBinding SitesElectrophoresis, Polyacrylamide GelDNA AdductsAnionsProtein DenaturationHorsesEquilenin