Cell CycleCell Cycle ProteinsCheckpoint Kinase 2Cell Cycle CheckpointsDNA DamageG2 PhaseGenes, cdcAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesS PhaseMitosisG2 Phase Cell Cycle CheckpointsG1 PhaseDNA RepairProtein KinasesTumor Suppressor Protein p53Tumor Suppressor ProteinsDNA-Binding ProteinsM Phase Cell Cycle CheckpointsAtaxia TelangiectasiaGamma Rayscdc25 PhosphatasesNuclear ProteinsRadiation, IonizingDNA ReplicationHydroxyureaCyclinsCyclin-Dependent Kinase Inhibitor p21PhosphorylationSpindle ApparatusCDC2 Protein KinaseCyclin BRadiation ToleranceCell DivisionApoptosisGenomic InstabilityG1 Phase Cell Cycle CheckpointsMutationSaccharomyces cerevisiae ProteinsSchizosaccharomycesCyclin B1S Phase Cell Cycle CheckpointsUltraviolet RaysNocodazoleCell Line, TumorSignal TransductionCell LineSchizosaccharomyces pombe ProteinsDNA Breaks, Double-StrandedSaccharomyces cerevisiaeHeLa CellsRetinoblastoma ProteinChromosomal InstabilityFibroblastsBRCA1 ProteinModels, BiologicalFlow CytometryCyclin-Dependent Kinase 2Fungal ProteinsHistonesMolecular Sequence DataGenes, p53KinetochoresTumor Cells, CulturedCell ProliferationCell NucleusDNACyclin EMimosineIntracellular Signaling Peptides and ProteinsMethyl MethanesulfonateDNA Repair EnzymesCell SurvivalCDC2-CDC28 KinasesCyclin-Dependent KinasesRNA, Small InterferingCells, CulturedCaffeineCyclin AAphidicolinAmino Acid SequenceProtein BindingNucleic Acid Synthesis InhibitorsPolyploidyCentrosomeCyclin-Dependent Kinase Inhibitor p27MetaphaseThioguanineDose-Response Relationship, RadiationBlastulaHCT116 CellsCyclin D1Antineoplastic AgentsTime FactorsExonucleasesCarrier ProteinsChromosome BreakageBase Sequence14-3-3 ProteinsChromatin