Checkpoint Kinase 2Cell Cycle ProteinsDNA DamageCell CycleProtein KinasesProtein-Serine-Threonine KinasesGenes, cdcG2 PhaseAtaxia Telangiectasia Mutated ProteinsMitosisS PhaseCell Cycle Checkpointscdc25 PhosphatasesDNA ReplicationDNA RepairPhosphorylationDNA-Binding ProteinsM Phase Cell Cycle CheckpointsSchizosaccharomyces pombe ProteinsSpindle ApparatusSaccharomyces cerevisiae ProteinsSchizosaccharomycesNuclear ProteinsTumor Suppressor ProteinsHydroxyureaSaccharomyces cerevisiaeMad2 ProteinsG2 Phase Cell Cycle CheckpointsMutationFungal ProteinsKinetochoresRad52 DNA Repair and Recombination ProteinTumor Suppressor Protein p53G1 PhaseIntracellular Signaling Peptides and ProteinsGamma RaysCDC2 Protein KinaseUltraviolet RaysDNA, FungalDNA Breaks, Double-StrandedRadiation, IonizingNocodazoleCell LineCdc20 ProteinsHeLa CellsMolecular Sequence DataS Phase Cell Cycle CheckpointsSignal TransductionCyclin BDNA Repair EnzymesGenomic InstabilityProtein BindingChromosomal InstabilityRad51 RecombinaseCell Line, TumorGenes, FungalChromosome SegregationMethyl MethanesulfonateApoptosisRecombination, GeneticCell DivisionCyclin-Dependent Kinase Inhibitor p21Amino Acid SequenceAtaxia TelangiectasiaRadiation ToleranceModels, BiologicalHistonesMetaphaseCyclinsDNA HelicasesCyclin B1Calcium-Binding ProteinsProtein Kinase InhibitorsRNA, Small InterferingDNARepressor ProteinsMeiosisChromosomal Proteins, Non-HistoneGene DeletionEnzyme ActivationAnaphaseReplication Protein AAurora KinasesBRCA1 ProteinCell NucleusBase SequenceFibroblastsG1 Phase Cell Cycle CheckpointsAneuploidyUbiquitin-Protein Ligase ComplexesCyclin-Dependent KinasesAnaphase-Promoting Complex-CyclosomeCell SurvivalCarrier ProteinsRNA InterferenceEndonucleasesPhosphatidylinositol 3-KinasesFlow CytometryExonucleasesEndodeoxyribonucleases