Cell CycleMitosisCell Cycle ProteinsS PhaseCheckpoint Kinase 2G1 PhaseG2 PhaseCell Cycle CheckpointsDisease ProgressionProtein-Serine-Threonine KinasesDNA DamageGenes, cdcCell DivisionCyclinsM Phase Cell Cycle CheckpointsDNA-Binding ProteinsSpindle ApparatusCDC2 Protein KinasePhosphorylationCell LineNuclear ProteinsMutationMolecular Sequence DataCyclin BCyclin-Dependent KinasesHeLa CellsCell ProliferationProtein KinasesRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsCell Line, TumorCyclin-Dependent Kinase 2ApoptosisCyclin-Dependent Kinase Inhibitor p27DNA ReplicationCyclin-Dependent Kinase Inhibitor p21Saccharomyces cerevisiae Proteinscdc25 PhosphatasesSignal TransductionSaccharomyces cerevisiaeCyclin D1Cyclin ESchizosaccharomycesCyclin ABase SequenceTumor Suppressor ProteinsTumor Suppressor Protein p53Cyclin B1KinetochoresCell NucleusAmino Acid SequenceHydroxyureaSchizosaccharomyces pombe ProteinsInterphaseS Phase Cell Cycle CheckpointsAtaxia Telangiectasia Mutated ProteinsCells, CulturedNocodazoleCDC2-CDC28 KinasesProtein BindingTranscription FactorsFlow CytometryE2F Transcription FactorsChromosome SegregationDNAModels, BiologicalCyclin-Dependent Kinase 4DNA RepairFungal ProteinsE2F1 Transcription FactorTranscription, GeneticAnaphaseRNA, Small InterferingTime FactorsUbiquitin-Protein Ligase ComplexesG0 PhaseTumor Cells, CulturedReplication Protein AAnaphase-Promoting Complex-CyclosomeCentrosomeMetaphaseBlotting, WesternTransfectionRNA InterferenceRNA, MessengerHistonesGene Expression RegulationG1 Phase Cell Cycle CheckpointsCell SurvivalFibroblastsAurora KinasesMicrotubulesProliferating Cell Nuclear AntigenMicrotubule-Associated ProteinsAphidicolinDown-RegulationCdc20 ProteinsCarrier ProteinsChromatinChromosomes