Checkpoint Kinase 2Cell Cycle ProteinsDNA DamageCell CycleProtein KinasesProtein-Serine-Threonine KinasesGenes, cdcG2 PhaseAtaxia Telangiectasia Mutated ProteinsMitosisS PhaseCell Cycle Checkpointscdc25 PhosphatasesDNA ReplicationPhosphorylationDNA-Binding ProteinsDNA RepairM Phase Cell Cycle CheckpointsSchizosaccharomyces pombe ProteinsSpindle ApparatusSaccharomyces cerevisiae ProteinsSchizosaccharomycesTumor Suppressor ProteinsNuclear ProteinsHydroxyureaMad2 ProteinsSaccharomyces cerevisiaeMutationG2 Phase Cell Cycle CheckpointsKinetochoresFungal ProteinsTumor Suppressor Protein p53Rad52 DNA Repair and Recombination ProteinG1 PhaseIntracellular Signaling Peptides and ProteinsGamma RaysUltraviolet RaysCDC2 Protein KinaseDNA, FungalDNA Breaks, Double-StrandedCell LineRadiation, IonizingCell Line, TumorNocodazoleMolecular Sequence DataHeLa CellsSignal TransductionCdc20 ProteinsS Phase Cell Cycle CheckpointsCyclin BGenomic InstabilityDNA Repair EnzymesProtein BindingChromosomal InstabilityRad51 RecombinaseApoptosisCell DivisionGenes, FungalMethyl MethanesulfonateRecombination, GeneticChromosome SegregationCyclin-Dependent Kinase Inhibitor p21Amino Acid SequenceAtaxia TelangiectasiaRadiation ToleranceModels, BiologicalHistonesProtein Kinase InhibitorsCyclinsMetaphaseRNA, Small InterferingCyclin B1DNA HelicasesCalcium-Binding ProteinsDNARepressor ProteinsGene DeletionEnzyme ActivationBase SequenceMeiosisFibroblastsCell SurvivalCell NucleusBRCA1 ProteinReplication Protein AAnaphaseAurora KinasesChromosomal Proteins, Non-HistoneCell ProliferationFlow CytometryG1 Phase Cell Cycle CheckpointsCyclin-Dependent KinasesAneuploidyRNA InterferenceUbiquitin-Protein Ligase ComplexesCarrier ProteinsAnaphase-Promoting Complex-CyclosomePhosphatidylinositol 3-KinasesBlotting, WesternEndonucleases