Checkpoint Kinase 2Cell CycleCell Cycle ProteinsDNA DamageProtein-Serine-Threonine KinasesG2 PhaseProtein KinasesCell Cycle CheckpointsAtaxia Telangiectasia Mutated ProteinsGenes, cdcMitosisS PhaseG2 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsPhosphorylationDNA Repaircdc25 PhosphatasesG1 PhaseDNA ReplicationHydroxyureaDNA-Binding ProteinsTumor Suppressor ProteinsTumor Suppressor Protein p53Spindle ApparatusCDC2 Protein KinaseNuclear ProteinsRadiation, IonizingSaccharomyces cerevisiae ProteinsSchizosaccharomycesMutationSchizosaccharomyces pombe ProteinsGamma RaysS Phase Cell Cycle CheckpointsCyclin BSaccharomyces cerevisiaeApoptosisCyclin-Dependent Kinase Inhibitor p21Ataxia TelangiectasiaSignal TransductionGenomic InstabilityCell DivisionCell Line, TumorNocodazoleCyclinsKinetochoresHeLa CellsProtein Kinase InhibitorsIntracellular Signaling Peptides and ProteinsRadiation ToleranceUltraviolet RaysDNA Breaks, Double-StrandedCell LineModels, BiologicalPhosphatidylinositol 3-KinasesFungal ProteinsMolecular Sequence DataHistonesCyclin-Dependent KinasesG1 Phase Cell Cycle CheckpointsMethyl MethanesulfonateCyclin B1Protein BindingFibroblastsRNA, Small InterferingChromosomal InstabilityMAP Kinase Signaling SystemCyclin-Dependent Kinase 2Cell NucleusAmino Acid SequenceCdc20 ProteinsFlow CytometryCell SurvivalEnzyme ActivationBRCA1 ProteinCell ProliferationDNATumor Cells, CulturedCDC2-CDC28 KinasesRetinoblastoma ProteinDNA, FungalProtein-Tyrosine KinasesChromosome SegregationRNA InterferenceBlotting, WesternCaffeineNucleic Acid Synthesis InhibitorsCells, CulturedAurora KinasesAphidicolinHCT116 CellsTransfectionReplication Protein ACarrier ProteinsChromosomal Proteins, Non-HistoneMetaphaseAntineoplastic AgentsBase SequenceProtein Structure, TertiaryPolyploidyEnzyme Inhibitors