Cell CycleCell Cycle ProteinsCheckpoint Kinase 2Cell Cycle CheckpointsMitosisGenes, cdcM Phase Cell Cycle CheckpointsDNA DamageG2 PhaseS PhaseProtein-Serine-Threonine KinasesG2 Phase Cell Cycle CheckpointsG1 PhaseDNA ReplicationSpindle ApparatusProtein KinasesCell LineAtaxia Telangiectasia Mutated ProteinsS Phase Cell Cycle CheckpointsNuclear ProteinsHydroxyureaKinetochoresCell DivisionDNA-Binding ProteinsPhosphorylationSaccharomyces cerevisiae ProteinsMutationCDC2 Protein KinaseCyclinsTumor Suppressor Protein p53SchizosaccharomycesDNA RepairCyclin BSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaecdc25 PhosphatasesHeLa CellsNocodazoleApoptosisMolecular Sequence DataCyclin-Dependent Kinase Inhibitor p21Tumor Suppressor ProteinsCell Line, TumorSignal TransductionCdc20 ProteinsG1 Phase Cell Cycle CheckpointsDNAFibroblastsCell ProliferationCells, CulturedChromosome SegregationBase SequenceFungal ProteinsRetinoblastoma ProteinCell NucleusCyclin B1Menstrual CycleModels, BiologicalAmino Acid SequenceCyclin-Dependent Kinase 2Flow CytometryCyclin-Dependent Kinase Inhibitor p27AnaphaseUbiquitin-Protein Ligase ComplexesAnaphase-Promoting Complex-CyclosomeUltraviolet RaysTranscription, GeneticInterphaseMetaphaseHistonesProtein BindingTransfectionGene Expression RegulationTumor Cells, CulturedCell SurvivalGamma RaysCell Transformation, NeoplasticGenomic InstabilityCyclin AIntracellular Signaling Peptides and ProteinsTime FactorsCyclin ETranscription FactorsRNA, Small InterferingL Cells (Cell Line)RNA, MessengerRadiation, IonizingG0 PhaseChromosomesAurora KinasesChromosomal Proteins, Non-HistoneDNA, FungalCyclin D1Repressor ProteinsDNA Breaks, Double-StrandedCDC2-CDC28 KinasesBlotting, WesternChromatinRNA InterferenceCarrier Proteins