Cell CycleCell Cycle ProteinsGenes, cdcMitosisCell DivisionCheckpoint Kinase 2DNA DamageM Phase Cell Cycle CheckpointsG2 PhaseProtein-Serine-Threonine KinasesMad2 ProteinsCell Cycle CheckpointsSpindle ApparatusProtein KinasesS PhaseDNA ReplicationAtaxia Telangiectasia Mutated ProteinsHydroxyureacdc25 PhosphatasesNuclear ProteinsKinetochoresSchizosaccharomycesMutationCdc20 ProteinsSaccharomyces cerevisiaeG1 PhaseSaccharomyces cerevisiae ProteinsCDC2 Protein KinaseNocodazoleG2 Phase Cell Cycle CheckpointsChromosomal InstabilityDNA-Binding ProteinsDNA RepairSchizosaccharomyces pombe ProteinsFungal ProteinsCyclin BPhosphorylationChromosome SegregationTumor Suppressor Protein p53HeLa CellsMolecular Sequence DataCyclinsGenes, FungalUbiquitin-Protein Ligase ComplexesAnaphase-Promoting Complex-CyclosomeTumor Suppressor ProteinsGamma RaysCyclin B1AneuploidyModels, BiologicalCalcium-Binding ProteinsDNA, FungalApoptosisRepressor ProteinsCentrosomeRadiation, IonizingSignal TransductionCell Line, TumorAtaxia TelangiectasiaUltraviolet RaysChromosomal Proteins, Non-HistoneCell NucleusAmino Acid SequenceAntimitotic AgentsCyclin-Dependent KinasesAnaphaseCell LineGenomic InstabilityCyclin-Dependent Kinase Inhibitor p21MetaphaseBase SequenceS Phase Cell Cycle CheckpointsMicrotubulesAurora KinasesInterphaseIntracellular Signaling Peptides and ProteinsFlow CytometryProtein BindingPhenotypeHistonesFibroblastsCyclin-Dependent Kinase 2Retinoblastoma ProteinRadiation ToleranceG1 Phase Cell Cycle CheckpointsChromosomesPolyploidyDNATime FactorsCyclin ACarrier ProteinsRNA, Small InterferingCells, CulturedCell ProliferationDNA Breaks, Double-StrandedCell Nucleus DivisionAurora Kinase BRNA InterferenceGene DeletionTumor Cells, Cultured