ApoptosisCell CycleGene Expression ProfilingCell Cycle ProteinsGene ExpressionGene Expression RegulationGenes, cdcDNA DamageCheckpoint Kinase 2G2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA RepairDNA-Binding ProteinsNuclear ProteinsG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53HydroxyureaSpindle ApparatusM Phase Cell Cycle CheckpointsG1 PhaseMutationGamma RaysDNA ReplicationTumor Suppressor ProteinsMolecular Sequence DataSaccharomyces cerevisiae ProteinsMad2 ProteinsFungal ProteinsSchizosaccharomycesSignal TransductionSaccharomyces cerevisiaePhosphorylationCell Line, TumorSchizosaccharomyces pombe ProteinsBase SequenceCell LineRadiation, IonizingCyclin-Dependent Kinase Inhibitor p21Cell DivisionAtaxia TelangiectasiaCyclinsRNA, Messengercdc25 PhosphatasesChromosomal InstabilityGenes, FungalUltraviolet RaysIntracellular Signaling Peptides and ProteinsCDC2 Protein KinaseGene Expression Regulation, NeoplasticCyclin BOligonucleotide Array Sequence AnalysisCells, CulturedRadiation ToleranceTumor Cells, CulturedHeLa CellsCell SurvivalTranscription FactorsTranscription, GeneticCell ProliferationFlow CytometryFibroblastsGenomic InstabilityG1 Phase Cell Cycle CheckpointsAmino Acid SequenceModels, BiologicalRepressor ProteinsGene DeletionPhenotypeReverse Transcriptase Polymerase Chain ReactionDNA, FungalDNACyclin B1Cell NucleusNeoplasm ProteinsRNA, Small InterferingS Phase Cell Cycle CheckpointsTransfectionRetinoblastoma ProteinHistonesBlotting, WesternNocodazoleDNA PrimersDNA Breaks, Double-StrandedTime FactorsCaspasesPromoter Regions, GeneticApoptosis Regulatory ProteinsGenes, p53Protein BindingGene Expression Regulation, DevelopmentalCaspase 3Enzyme ActivationAneuploidyProto-Oncogene Proteins c-bcl-2Down-Regulation