Cell CycleCell Cycle ProteinsDNA DamageGenes, cdcCheckpoint Kinase 2G2 PhaseCell Cycle CheckpointsMitosisProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsS PhaseProtein KinasesDNA RepairHydroxyureaSpindle ApparatusG2 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsDNA-Binding ProteinsG1 PhaseNuclear ProteinsDNA ReplicationGamma RaysTumor Suppressor Protein p53Saccharomyces cerevisiae ProteinsSchizosaccharomycesSaccharomyces cerevisiaeMutationFungal ProteinsMad2 ProteinsTumor Suppressor ProteinsEukaryotic CellsSchizosaccharomyces pombe ProteinsAtaxia TelangiectasiaRadiation, IonizingPhosphorylationUltraviolet Rayscdc25 PhosphatasesChromosomal InstabilityMolecular Sequence DataGenes, FungalCyclinsCyclin-Dependent Kinase Inhibitor p21CDC2 Protein KinaseCyclin BApoptosisRadiation ToleranceCell DivisionIntracellular Signaling Peptides and ProteinsGenomic InstabilityBase SequenceG1 Phase Cell Cycle CheckpointsDNA, FungalCell LineHeLa CellsSignal TransductionCell Line, TumorCyclin B1S Phase Cell Cycle CheckpointsDNA Breaks, Double-StrandedNocodazoleGene DeletionModels, BiologicalFibroblastsAmino Acid SequenceRetinoblastoma ProteinDNAHistonesRepressor ProteinsAneuploidyBRCA1 ProteinFlow CytometryCell NucleusChromosomes, FungalCDC28 Protein Kinase, S cerevisiaeCyclin-Dependent Kinase 2Protein BindingPhenotypeGenes, p53Tumor Cells, CulturedCell ProliferationCell SurvivalKinetochoresMethyl MethanesulfonateDNA Repair EnzymesNeoplasm ProteinsCells, CulturedCyclin ERNA, Small InterferingMimosineCyclin-Dependent KinasesCDC2-CDC28 KinasesGene Expression Regulation, NeoplasticCalcium-Binding ProteinsTime FactorsCaffeineDNA PrimersAphidicolinDose-Response Relationship, RadiationAllelesCarrier Proteins