Cell CycleS Phase Cell Cycle CheckpointsG2 Phase Cell Cycle CheckpointsMitosisG1 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsCell Cycle ProteinsG2 PhaseCell Cycle CheckpointsS PhaseG1 PhaseDNA DamageCheckpoint Kinase 2Genes, cdcProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated Proteinscdc25 PhosphatasesTumor Suppressor Protein p53CDC2 Protein KinaseProtein KinasesCyclin-Dependent Kinase Inhibitor p21PhosphorylationCell DivisionDNA RepairCyclinsCyclin B1DNA-Binding ProteinsApoptosisCell Line, TumorDNA ReplicationTumor Suppressor ProteinsSpindle ApparatusNuclear ProteinsCyclin BCell ProliferationGamma RaysHeLa CellsHydroxyureaAtaxia TelangiectasiaG0 PhaseFlow CytometryCell LineRetinoblastoma ProteinRadiation, IonizingCyclin-Dependent Kinase 2MutationRadiation ToleranceCyclin-Dependent KinasesInterphaseSignal TransductionNocodazoleUltraviolet RaysCyclin ESaccharomyces cerevisiae ProteinsCyclin-Dependent Kinase Inhibitor p27Cyclin D1Saccharomyces cerevisiaeSchizosaccharomycesCell SurvivalGenomic InstabilityCell NucleusHistonesSchizosaccharomyces pombe ProteinsTumor Cells, CulturedFibroblastsRNA, Small InterferingMolecular Sequence DataKinetochoresFungal ProteinsModels, BiologicalBlotting, WesternDNACyclin-Dependent Kinase 4Cells, CulturedAntineoplastic Agents, PhytogenicMimosineChromosomal InstabilityDNA Breaks, Double-StrandedCyclin AAllyl CompoundsAntineoplastic AgentsAphidicolinCentrosomeCDC2-CDC28 KinasesMetaphaseAmino Acid SequenceBRCA1 ProteinChromosomesProtein BindingDose-Response Relationship, RadiationTime FactorsChromatinTranscription FactorsChromosome SegregationGenes, p53MicrotubulesAnaphaseGene Expression Regulation, NeoplasticRNA InterferenceBromodeoxyuridine