Cell CycleCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseProteasome Endopeptidase ComplexMitosisS PhaseCyclinsCell DivisionMolecular Sequence DataApoptosisCell LineG2 PhaseMenstrual CycleProteolysisCyclin-Dependent Kinase Inhibitor p27Cell ProliferationUbiquitinCell Line, TumorPhosphorylationCyclin-Dependent Kinase Inhibitor p21Retinoblastoma ProteinMutationAmino Acid SequenceG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53Signal TransductionCells, CulturedProtein-Serine-Threonine KinasesUbiquitin-Protein LigasesDNA-Binding ProteinsUbiquitinationCDC2 Protein KinaseRNA, MessengerHeLa CellsNuclear ProteinsG0 PhaseTime FactorsBiodegradation, EnvironmentalModels, BiologicalProtein BindingCyclin-Dependent Kinase 2DNA DamageG1 Phase Cell Cycle CheckpointsCell NucleusCyclin D1Transcription FactorsDNA ReplicationSaccharomyces cerevisiaeCyclin EBase SequenceCyclin BTumor Suppressor ProteinsCyclin AFlow CytometryKineticsTumor Cells, CulturedGene Expression RegulationBlotting, WesternGenes, cdcTranscription, GeneticSaccharomyces cerevisiae ProteinsUbiquitinsInterphaseCysteine EndopeptidasesCyclin-Dependent Kinase 4Down-Regulationcdc25 PhosphatasesCDC2-CDC28 KinasesFibroblastsDNAMultienzyme ComplexesCell SurvivalCyclin B1RNA, Small InterferingUbiquitin-Protein Ligase ComplexesEstrous CycleCell DifferentiationCarrier ProteinsE2F Transcription FactorsFungal ProteinsRNA InterferenceProtein Processing, Post-TranslationalRecombinant Fusion ProteinsProteinsProtein KinasesEnzyme InhibitorsF-Box ProteinsCyclin DProtein Structure, TertiaryAnaphase-Promoting Complex-CyclosomeCitric Acid CycleProto-Oncogene ProteinsE2F1 Transcription FactorBromodeoxyuridineMicrotubule-Associated ProteinsAntineoplastic AgentsCyclin-Dependent Kinase Inhibitor ProteinsProtein TransportReverse Transcriptase Polymerase Chain Reaction