Cell CycleSpindle ApparatusCell Cycle ProteinsMitosisGenes, cdcNocodazoleDNA DamageProtein-Serine-Threonine KinasesCheckpoint Kinase 2Cell Cycle CheckpointsG2 PhaseKinetochoresProtein KinasesAtaxia Telangiectasia Mutated ProteinsPolyploidyMad2 ProteinsS PhaseG2 Phase Cell Cycle CheckpointsDNA RepairG1 PhaseTumor Suppressor Protein p53Muscle SpindlesM Phase Cell Cycle CheckpointsTumor Suppressor ProteinsNuclear ProteinsDNA-Binding ProteinsGamma RaysAtaxia TelangiectasiaDNA ReplicationRadiation, IonizingPhosphorylationcdc25 PhosphatasesHydroxyureaCDC2 Protein KinaseCyclin BCyclinsCyclin-Dependent Kinase Inhibitor p21Cell DivisionMutationMicrotubulesSaccharomyces cerevisiae ProteinsApoptosisRadiation ToleranceGenomic InstabilitySchizosaccharomycesCentrosomeHeLa CellsMetaphaseSaccharomyces cerevisiaeSchizosaccharomyces pombe ProteinsUltraviolet RaysG1 Phase Cell Cycle CheckpointsAnaphaseCyclin B1Cell LineCell Line, TumorSignal TransductionS Phase Cell Cycle CheckpointsChromosomal InstabilityDNA Breaks, Double-StrandedModels, BiologicalChromosome SegregationFibroblastsFungal ProteinsMolecular Sequence DataRetinoblastoma ProteinCell NucleusBRCA1 ProteinFlow CytometryHistonesCyclin-Dependent Kinase 2ChromosomesDNAGenes, p53Microtubule-Associated ProteinsCell ProliferationTumor Cells, CulturedCell SurvivalIntracellular Signaling Peptides and ProteinsRNA, Small InterferingProtein BindingCells, CulturedMethyl MethanesulfonateAmino Acid SequenceDNA Repair EnzymesAurora KinasesCyclin ECdc20 ProteinsTime FactorsChromosomal Proteins, Non-HistoneMimosineMeiosisCyclin-Dependent KinasesInterphaseRNA InterferenceCDC2-CDC28 KinasesCyclin ACaffeineDose-Response Relationship, RadiationAphidicolin