Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA RepairHydroxyureaSpindle ApparatusG2 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsG1 PhaseDNA-Binding ProteinsNuclear ProteinsDNA ReplicationTumor Suppressor Protein p53Gamma RaysMad2 ProteinsSaccharomyces cerevisiae ProteinsSchizosaccharomycesTumor Suppressor ProteinsFungal ProteinsSchizosaccharomyces pombe ProteinsMutationSaccharomyces cerevisiaeAtaxia Telangiectasiacdc25 PhosphatasesRadiation, IonizingChromosomal InstabilityPhosphorylationCyclinsCyclin-Dependent Kinase Inhibitor p21Ultraviolet RaysCDC2 Protein KinaseGenes, FungalCyclin BCell DivisionRadiation ToleranceApoptosisIntracellular Signaling Peptides and ProteinsGenomic InstabilityG1 Phase Cell Cycle CheckpointsMolecular Sequence DataSignal TransductionCyclin B1Cell LineDNA, FungalCell Line, TumorS Phase Cell Cycle CheckpointsNocodazoleHeLa CellsDNA Breaks, Double-StrandedFibroblastsRetinoblastoma ProteinGene DeletionBase SequenceAneuploidyModels, BiologicalRepressor ProteinsFlow CytometryBRCA1 ProteinCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2HistonesChromosomes, FungalGenes, p53Cell ProliferationPhenotypeTumor Cells, CulturedKinetochoresCell NucleusCells, CulturedDNANeoplasm ProteinsCell SurvivalCyclin EMimosineDNA Repair EnzymesRNA, Small InterferingMethyl MethanesulfonateCDC2-CDC28 KinasesGene Expression Regulation, NeoplasticCyclin-Dependent KinasesProtein BindingAmino Acid SequenceCalcium-Binding ProteinsCaffeineCyclin AAphidicolinAllelesNucleic Acid Synthesis InhibitorsTime FactorsPolyploidyCentrosome