ProteomicsMass SpectrometryTandem Mass SpectrometrySpectrometry, Mass, Electrospray IonizationSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationChromatography, LiquidProteomeGas Chromatography-Mass SpectrometryElectrophoresis, Gel, Two-DimensionalChromatography, High Pressure LiquidMolecular Sequence DataAmino Acid SequenceIsotope LabelingSpectrometry, Mass, Secondary IonPeptidesProteinsSpectrometry, Mass, Fast Atom BombardmentPeptide MappingReproducibility of ResultsDatabases, ProteinProtein Array AnalysisReference StandardsMetabolomicsDeuterium Exchange MeasurementMolecular StructureProtein Processing, Post-TranslationalSequence Analysis, ProteinSoftwareSensitivity and Specificity