Proteasome Endopeptidase ComplexCysteine EndopeptidasesMultienzyme ComplexesUbiquitinProteolysisUbiquitinsProteasome InhibitorsLeupeptinsThermoplasmaUbiquitinationUbiquitin-Protein LigasesPeptide HydrolasesCysteine Proteinase InhibitorsProteinsMolecular Sequence DataMuscle ProteinsAmino Acid SequenceMethylhistidinesUbiquitinated ProteinsEndopeptidasesProtease InhibitorsEndoplasmic Reticulum-Associated DegradationProtein Processing, Post-TranslationalHydrolysisCell LineEndoplasmic ReticulumPolyubiquitinLysosomesAdenosine TriphosphatasesAutophagySKP Cullin F-Box Protein LigasesProtein BindingF-Box ProteinsMutationSaccharomyces cerevisiaeAcetylcysteineMuscular AtrophySaccharomyces cerevisiae ProteinsKineticsUbiquitin-Conjugating EnzymesMolecular ChaperonesLeucineProtein TransportLigasesCells, CulturedSignal TransductionBiodegradation, EnvironmentalProtein SubunitsSubstrate SpecificityAmino AcidsProtein Structure, TertiaryEndopeptidase ClpProtein StabilityModels, BiologicalProtein FoldingHeLa CellsProtein BiosynthesisRNA, MessengerUbiquitin ThiolesteraseBlotting, WesternCell Cycle ProteinsPeptidesCarrier ProteinsTime FactorsImmunoblottingCullin ProteinsAdenosine TriphosphateCell Line, TumorPhosphorylationOligopeptidesCytosolRecombinant Fusion ProteinsATP-Dependent ProteasesMuscle, SkeletalBase SequenceCycloheximideCalpainCaseinsImmunoprecipitationDown-RegulationUbiquitin-Activating EnzymesHaloferax volcaniiNuclear ProteinsElectrophoresis, Polyacrylamide GelLiverGene Expression RegulationFungal ProteinsProtein Synthesis InhibitorsMembrane ProteinsCell NucleusElectrophoresis, Gel, Two-DimensionalPeptide FragmentsHEK293 CellsRecombinant ProteinsSequence Homology, Amino AcidCytoplasmSodium CholateUbiquitin-Protein Ligase ComplexesHSP90 Heat-Shock ProteinsChymotrypsin