Cell CycleCell Cycle ProteinsCell Cycle CheckpointsG2 PhaseCheckpoint Kinase 2DNA DamageGenes, cdcS PhaseMitosisAtaxia Telangiectasia Mutated ProteinsProtein-Serine-Threonine KinasesG1 PhaseG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53DNA RepairProtein KinasesTumor Suppressor ProteinsCyclinsDNA-Binding ProteinsCyclin-Dependent Kinase Inhibitor p21DNA ReplicationNuclear ProteinsM Phase Cell Cycle Checkpointscdc25 PhosphatasesCell DivisionPhosphorylationCDC2 Protein KinaseGamma RaysHydroxyureaCyclin BAtaxia TelangiectasiaRadiation, IonizingApoptosisSpindle ApparatusG1 Phase Cell Cycle CheckpointsMutationRetinoblastoma ProteinRadiation ToleranceCell Line, TumorCyclin B1Cell LineSaccharomyces cerevisiae ProteinsGenomic InstabilitySignal TransductionSchizosaccharomycesS Phase Cell Cycle CheckpointsHeLa CellsSaccharomyces cerevisiaeCyclin-Dependent Kinase 2Cell ProliferationNocodazoleFlow CytometrySchizosaccharomyces pombe ProteinsUltraviolet RaysFibroblastsMolecular Sequence DataModels, BiologicalCyclin EDNA Breaks, Double-StrandedCyclin-Dependent Kinase Inhibitor p27Cell NucleusFungal ProteinsTumor Cells, CulturedHistonesChromosomal InstabilityDNACDC2-CDC28 KinasesCyclin AMenstrual CycleCell SurvivalBRCA1 ProteinCyclin D1Cells, CulturedGenes, p53MimosineAmino Acid SequenceInterphaseRNA, Small InterferingProtein BindingKinetochoresIntracellular Signaling Peptides and ProteinsTime FactorsCyclin-Dependent Kinase 4Base SequenceAphidicolinCyclin-Dependent KinasesCentrosomeTranscription FactorsAntineoplastic AgentsDNA Repair EnzymesMethyl MethanesulfonateBlotting, WesternG0 PhaseGene Expression RegulationNucleic Acid Synthesis InhibitorsCarrier ProteinsTransfectionCaffeinePolyploidyMetaphase