Cell CycleG2 Phase Cell Cycle CheckpointsS Phase Cell Cycle CheckpointsG1 Phase Cell Cycle CheckpointsCell Cycle ProteinsM Phase Cell Cycle CheckpointsG2 PhaseCell Cycle CheckpointsG1 PhaseS PhaseDNA DamageCell Line, TumorMitosisCheckpoint Kinase 2Protein-Serine-Threonine KinasesTumor Suppressor Protein p53Cell DivisionGenes, cdcAtaxia Telangiectasia Mutated ProteinsApoptosisCyclin-Dependent Kinase Inhibitor p21cdc25 PhosphatasesCell ProliferationCyclinsPhosphorylationCDC2 Protein KinaseProtein KinasesCyclin B1Tumor Cells, CulturedDNA-Binding ProteinsG0 PhaseTumor Suppressor ProteinsFlow CytometryDNA RepairCell LineRetinoblastoma ProteinSignal TransductionCyclin-Dependent Kinase Inhibitor p27DNA ReplicationCyclin D1Nuclear ProteinsCyclin-Dependent Kinase 2Cell SurvivalHeLa CellsMutationCyclin EMenstrual CycleGamma RaysCyclin BCyclin-Dependent KinasesHydroxyureaBlotting, WesternTime FactorsCells, CulturedRadiation ToleranceCyclin-Dependent Kinase 4Antineoplastic AgentsRadiation, IonizingRNA, Small InterferingMolecular Sequence DataAtaxia TelangiectasiaModels, BiologicalAllyl CompoundsSpindle ApparatusFibroblastsAntineoplastic Agents, PhytogenicGene Expression Regulation, NeoplasticCell NucleusUltraviolet RaysDNASaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsInterphaseDose-Response Relationship, DrugRNA, MessengerTranscription FactorsGenomic InstabilityNocodazoleHistonesBase SequenceSchizosaccharomycesNeoplasmsCyclin AAmino Acid SequenceMimosineCDC2-CDC28 KinasesTransfectionFungal ProteinsSchizosaccharomyces pombe ProteinsIsothiocyanatesGenes, p53Gene Expression RegulationProtein BindingNeoplasm ProteinsChromosomal InstabilityDNA Breaks, Double-StrandedUp-RegulationDose-Response Relationship, RadiationAphidicolinPhenotype