ProteomicsProteomeIsotope LabelingMass SpectrometryTandem Mass SpectrometryChromatography, LiquidOxygen IsotopesBiological MarkersElectrophoresis, Gel, Two-DimensionalSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationPeptidesProteinsChemical FractionationReproducibility of ResultsNitrogen IsotopesDatabases, ProteinMetabolic Networks and PathwaysProtein Array AnalysisIsotopesComputational BiologyAmino Acid SequenceMolecular Sequence DataGene Expression ProfilingSoftwareComplex MixturesCluster AnalysisTumor Markers, BiologicalBlood ProteinsProtein Interaction MapsProtein Interaction MappingSpectrometry, Mass, Electrospray IonizationProtein Processing, Post-TranslationalSequence Analysis, ProteinAlgorithmsStaining and LabelingProteolysisPeptide MappingBlotting, WesternSmall Ubiquitin-Related Modifier ProteinsSystems BiologyCell Line, TumorSignal TransductionHeLa CellsPeptide FragmentsChromatography, High Pressure LiquidReference StandardsArabidopsis ProteinsArabidopsisProtein BindingAmino AcidsNeoplasm ProteinsProteasome Endopeptidase ComplexStress, PhysiologicalModels, BiologicalMultiprotein ComplexesBacterial ProteinsGene Expression RegulationProtein TransportSaccharomyces cerevisiae ProteinsSaccharomyces cerevisiaeCell LineMembrane ProteinsUbiquitinationLysinePlant ProteinsPhosphorylationCells, CulturedSubcellular FractionsRNA InterferenceMetabolomicsUp-RegulationRNA, Small InterferingPlant LeavesNuclear ProteinsBiomarkers, PharmacologicalTime FactorsElectrophoresis, Polyacrylamide GelGene Expression Regulation, PlantRNA, MessengerSubstrate SpecificityGenomicsMutationTranscription FactorsSensitivity and SpecificityTwo-Dimensional Difference Gel ElectrophoresisCell Differentiation