Checkpoint Kinase 2Cell CycleCell Cycle ProteinsProtein-Serine-Threonine KinasesGenes, cdcProtein KinasesDNA DamageG2 PhaseMitosisCell Cycle CheckpointsAtaxia Telangiectasia Mutated ProteinsS PhaseM Phase Cell Cycle CheckpointsHydroxyureaSpindle ApparatusG2 Phase Cell Cycle CheckpointsDNA RepairPhosphorylationDNA ReplicationDNA-Binding ProteinsNuclear ProteinsSaccharomyces cerevisiae ProteinsCDC2 Protein KinaseSchizosaccharomycescdc25 PhosphatasesMutationSchizosaccharomyces pombe ProteinsG1 PhaseTumor Suppressor ProteinsTumor Suppressor Protein p53Phosphatidylinositol 3-KinasesSaccharomyces cerevisiaeProtein Kinase InhibitorsGamma RaysIntracellular Signaling Peptides and ProteinsRadiation, IonizingFungal ProteinsMAP Kinase Signaling SystemSignal TransductionUltraviolet RaysApoptosisCyclin BCell Line, TumorS Phase Cell Cycle CheckpointsCyclin-Dependent Kinase Inhibitor p21Molecular Sequence DataCell DivisionHeLa CellsChromosomal InstabilityMad2 ProteinsAtaxia TelangiectasiaCyclin-Dependent KinasesCyclinsCell LineGenomic InstabilityNocodazoleKinetochoresGenes, FungalRadiation ToleranceDNA, FungalDNA Breaks, Double-StrandedModels, BiologicalCalcium-Calmodulin-Dependent Protein KinasesProtein BindingProtein-Tyrosine Kinasessrc-Family KinasesRNA, Small InterferingBase SequenceHistonesFibroblastsEnzyme ActivationCDC2-CDC28 KinasesCyclin-Dependent Kinase 2Cyclin B1Amino Acid SequenceGene DeletionMethyl MethanesulfonateG1 Phase Cell Cycle CheckpointsCell NucleusCell SurvivalTumor Cells, CulturedAurora KinasesBlotting, Westernp38 Mitogen-Activated Protein KinasesProtein Kinase CCell ProliferationFlow CytometryTransfectionDNARNA InterferenceCells, CulturedCDC28 Protein Kinase, S cerevisiaeCyclic AMP-Dependent Protein KinasesBRCA1 ProteinMitogen-Activated Protein Kinase 1Repressor ProteinsCdc20 ProteinsProtein Structure, TertiaryRetinoblastoma ProteinProto-Oncogene Proteins