Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseMitosisCell Cycle CheckpointsProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseMutationProtein KinasesG1 PhaseDNA RepairHydroxyureaSpindle ApparatusG2 Phase Cell Cycle CheckpointsDNA-Binding ProteinsM Phase Cell Cycle CheckpointsNuclear ProteinsPoint MutationTumor Suppressor Protein p53DNA ReplicationGamma RaysSaccharomyces cerevisiae ProteinsPhosphorylationCell DivisionMad2 ProteinsSchizosaccharomycesTumor Suppressor ProteinsFungal ProteinsApoptosisSaccharomyces cerevisiaeMutation, MissenseSchizosaccharomyces pombe ProteinsCell Line, TumorMolecular Sequence DataAtaxia TelangiectasiaCell LineChromosomal Instabilitycdc25 PhosphatasesRadiation, IonizingUltraviolet RaysGenes, FungalSignal TransductionCyclinsCyclin-Dependent Kinase Inhibitor p21CDC2 Protein KinaseCyclin BCell ProliferationIntracellular Signaling Peptides and ProteinsBase SequenceRadiation ToleranceGenomic InstabilityAmino Acid SequenceTumor Cells, CulturedG1 Phase Cell Cycle CheckpointsGene DeletionDNA, FungalCyclin B1Cells, CulturedHeLa CellsS Phase Cell Cycle CheckpointsFibroblastsNocodazoleCell DeathDNA Breaks, Double-StrandedGenes, p53AllelesPhenotypeAntineoplastic AgentsRetinoblastoma ProteinRepressor ProteinsBRCA1 ProteinModels, BiologicalDNAAneuploidyFrameshift MutationCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2Chromosomes, FungalHistonesFlow CytometryProtein BindingNeoplasm ProteinsCell NucleusDNA PrimersKinetochoresDNA Repair EnzymesCell SurvivalCyclin EGene Expression Regulation, NeoplasticMethyl MethanesulfonateMimosineGerm-Line MutationCarrier ProteinsCalcium-Binding ProteinsRNA, Small InterferingCDC2-CDC28 Kinases