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 ProteinsTumor Suppressor Protein p53DNA ReplicationGamma RaysMad2 ProteinsSchizosaccharomycesSaccharomyces cerevisiae ProteinsMutationTumor Suppressor ProteinsFungal ProteinsSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeAtaxia Telangiectasiacdc25 PhosphatasesChromosomal InstabilityRadiation, IonizingPhosphorylationCyclinsUltraviolet RaysCyclin-Dependent Kinase Inhibitor p21CDC2 Protein KinaseGenes, FungalCyclin BCell DivisionRadiation ToleranceIntracellular Signaling Peptides and ProteinsApoptosisGenomic InstabilityMolecular Sequence DataG1 Phase Cell Cycle CheckpointsCyclin B1DNA, FungalSignal TransductionCell Line, TumorCell LineS Phase Cell Cycle CheckpointsNocodazoleHeLa CellsGene DeletionDNA Breaks, Double-StrandedFibroblastsBase SequenceRetinoblastoma ProteinAneuploidyModels, BiologicalRepressor ProteinsBRCA1 ProteinFlow CytometryCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2Genes, p53HistonesPhenotypeChromosomes, FungalTumor Cells, CulturedCell ProliferationDNAKinetochoresNeoplasm ProteinsCell NucleusCyclin ECell SurvivalCells, CulturedGene Expression Regulation, NeoplasticDNA Repair EnzymesMimosineMethyl MethanesulfonateAmino Acid SequenceCDC2-CDC28 KinasesCalcium-Binding ProteinsRNA, Small InterferingCyclin-Dependent KinasesProtein BindingCaffeineAllelesCyclin ATime FactorsAphidicolinNucleic Acid Synthesis InhibitorsPolyploidyDNA Primers