Cell CycleS Phase Cell Cycle CheckpointsG2 Phase Cell Cycle CheckpointsG1 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsCell Cycle ProteinsG2 PhaseCell Cycle CheckpointsDNA DamageCheckpoint Kinase 2S PhaseG1 PhaseGenes, cdcAtaxia Telangiectasia Mutated ProteinsMitosisProtein-Serine-Threonine KinasesTumor Suppressor Protein p53Protein Kinasescdc25 PhosphatasesCyclin-Dependent Kinase Inhibitor p21DNA RepairCDC2 Protein KinaseDNA-Binding ProteinsCyclinsPhosphorylationCell DivisionApoptosisTumor Suppressor ProteinsCyclin B1Cell Line, TumorDNA ReplicationGamma RaysNuclear ProteinsAtaxia TelangiectasiaHydroxyureaRadiation, IonizingCell ProliferationCyclin BSpindle ApparatusRetinoblastoma ProteinSignal TransductionCell LineMutationRadiation ToleranceFlow CytometryG0 PhaseCyclin-Dependent Kinase 2HeLa CellsCyclin-Dependent KinasesCyclin-Dependent Kinase Inhibitor p27Genomic InstabilityCyclin D1Cyclin EUltraviolet RaysMolecular Sequence DataSaccharomyces cerevisiae ProteinsCell SurvivalNocodazoleSaccharomyces cerevisiaeSchizosaccharomycesTumor Cells, CulturedFibroblastsBlotting, WesternSchizosaccharomyces pombe ProteinsDNA Breaks, Double-StrandedRNA, Small InterferingAmino Acid SequenceCyclin-Dependent Kinase 4HistonesChromosomal InstabilityCells, CulturedProtein BindingModels, BiologicalAntineoplastic Agents, PhytogenicFungal ProteinsCell NucleusBRCA1 ProteinDNAMimosineAntineoplastic AgentsAllyl CompoundsInterphaseGenes, p53CDC2-CDC28 KinasesKinetochoresAphidicolinCyclin ABase SequenceTime FactorsDose-Response Relationship, RadiationIntracellular Signaling Peptides and ProteinsTranscription FactorsGene Expression Regulation, NeoplasticMethyl MethanesulfonateDNA Repair EnzymesCarrier ProteinsCaffeineRecombinant Fusion ProteinsTransfectionProtein Structure, Tertiary