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 ProteinsSchizosaccharomycesMutationTumor Suppressor ProteinsFungal ProteinsSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeGenomic InstabilityAtaxia TelangiectasiaChromosomal Instabilitycdc25 PhosphatasesRadiation, IonizingUltraviolet RaysCyclinsPhosphorylationCyclin-Dependent Kinase Inhibitor p21Molecular Sequence DataGenes, FungalCDC2 Protein KinaseCyclin BRadiation ToleranceCell DivisionIntracellular Signaling Peptides and ProteinsBase SequenceApoptosisG1 Phase Cell Cycle CheckpointsDNA, FungalCyclin B1Cell LineCell Line, TumorS Phase Cell Cycle CheckpointsSignal TransductionNocodazoleGene DeletionHeLa CellsDNA Breaks, Double-StrandedRetinoblastoma ProteinFibroblastsDNAAneuploidyModels, BiologicalRepressor ProteinsBRCA1 ProteinPhenotypeFlow CytometryHistonesCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2Chromosomes, FungalAmino Acid SequenceGenes, p53Tumor Cells, CulturedKinetochoresCell NucleusCell ProliferationNeoplasm ProteinsCyclin EDNA Repair EnzymesMethyl MethanesulfonateAllelesMimosineCell SurvivalVacuolar Proton-Translocating ATPasesCells, CulturedCDC2-CDC28 KinasesRNA, Small InterferingCalcium-Binding ProteinsCyclin-Dependent KinasesProtein BindingPolyploidyCaffeineCyclin AModels, GeneticAphidicolinNucleic Acid Synthesis InhibitorsCentrosome