Cell CycleCell Cycle ProteinsGenes, cdcCheckpoint Kinase 2DNA DamageG2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA-Binding ProteinsDNA RepairHydroxyureaG2 Phase Cell Cycle CheckpointsSpindle ApparatusNuclear ProteinsM Phase Cell Cycle CheckpointsPromoter Regions, GeneticG1 PhaseTumor Suppressor Protein p53DNA ReplicationGamma RaysMutationSaccharomyces cerevisiae ProteinsMad2 ProteinsTumor Suppressor ProteinsSchizosaccharomycesFungal ProteinsSchizosaccharomyces pombe ProteinsSaccharomyces cerevisiaeAtaxia TelangiectasiaMolecular Sequence Datacdc25 PhosphatasesRadiation, IonizingChromosomal InstabilityPhosphorylationBase SequenceCyclinsCyclin-Dependent Kinase Inhibitor p21Ultraviolet RaysGenes, FungalCDC2 Protein KinaseCyclin BCell LineCell DivisionRadiation ToleranceIntracellular Signaling Peptides and ProteinsApoptosisGenomic InstabilityHeLa CellsCell Line, TumorG1 Phase Cell Cycle CheckpointsRepressor ProteinsSignal TransductionDNA, FungalCyclin B1Gene DeletionS Phase Cell Cycle CheckpointsDNANocodazoleFibroblastsRetinoblastoma ProteinGene Expression RegulationDNA Breaks, Double-StrandedHistonesTumor Cells, CulturedTranscription, GeneticProtein BindingModels, BiologicalAneuploidyCell NucleusBRCA1 ProteinFlow CytometryTransfectionAmino Acid SequenceCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2Cells, CulturedPhenotypeGenes, p53Chromosomes, FungalNeoplasm ProteinsGene Expression Regulation, NeoplasticCell ProliferationDNA PrimersRNA, MessengerKinetochoresRNA, Small InterferingCyclin EDNA Repair EnzymesTranscription FactorsCell SurvivalAllelesMimosineMethyl MethanesulfonateChromatinCDC2-CDC28 KinasesCyclin-Dependent Kinases