Checkpoint Kinase 2Cell CycleCell Cycle ProteinsGenes, cdcDNA DamageProtein-Serine-Threonine KinasesProtein KinasesG2 PhaseCell Cycle CheckpointsMitosisAtaxia Telangiectasia Mutated ProteinsS PhaseM Phase Cell Cycle CheckpointsHydroxyureaSpindle ApparatusG2 Phase Cell Cycle CheckpointsDNA RepairDNA ReplicationDNA-Binding ProteinsNuclear ProteinsSaccharomyces cerevisiae ProteinsPhosphorylationSchizosaccharomycesSchizosaccharomyces pombe Proteinscdc25 PhosphatasesG1 PhaseTumor Suppressor ProteinsMutationTumor Suppressor Protein p53CDC2 Protein KinaseSaccharomyces cerevisiaeGamma RaysFungal ProteinsRadiation, IonizingIntracellular Signaling Peptides and ProteinsUltraviolet RaysS Phase Cell Cycle CheckpointsCyclin BMad2 ProteinsApoptosisChromosomal InstabilityCyclin-Dependent Kinase Inhibitor p21Ataxia TelangiectasiaSignal TransductionGenomic InstabilityCell DivisionCell Line, TumorNocodazoleCyclinsKinetochoresHeLa CellsMolecular Sequence DataProtein Kinase InhibitorsGenes, FungalRadiation ToleranceDNA, FungalDNA Breaks, Double-StrandedCell LineModels, BiologicalPhosphatidylinositol 3-KinasesHistonesCyclin-Dependent KinasesG1 Phase Cell Cycle CheckpointsMethyl MethanesulfonateCyclin B1Protein BindingFibroblastsGene DeletionRNA, Small InterferingBase SequenceMAP Kinase Signaling SystemCyclin-Dependent Kinase 2Cell NucleusAmino Acid SequenceCdc20 ProteinsFlow CytometryCell SurvivalEnzyme ActivationBRCA1 ProteinCell ProliferationRepressor ProteinsDNATumor Cells, CulturedCDC2-CDC28 KinasesRetinoblastoma ProteinCDC28 Protein Kinase, S cerevisiaeAneuploidyProtein-Tyrosine KinasesChromosome SegregationRNA InterferenceBlotting, WesternCaffeinePhenotypeNucleic Acid Synthesis InhibitorsCells, CulturedAurora KinasesAphidicolinHCT116 CellsCalcium-Binding ProteinsTransfection