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 ProteinsSaccharomyces cerevisiae ProteinsSpindle ApparatusSchizosaccharomycesNuclear ProteinsTumor Suppressor ProteinsHydroxyureaSaccharomyces cerevisiaeMad2 ProteinsG2 Phase Cell Cycle CheckpointsMutationKinetochoresFungal ProteinsRad52 DNA Repair and Recombination ProteinTumor Suppressor Protein p53G1 PhaseIntracellular Signaling Peptides and ProteinsGamma RaysCDC2 Protein KinaseUltraviolet RaysDNA, FungalDNA Breaks, Double-StrandedRadiation, IonizingNocodazoleCell LineHeLa CellsMolecular Sequence DataCdc20 ProteinsSignal TransductionS Phase Cell Cycle CheckpointsProtein BindingCyclin BDNA Repair EnzymesGenomic InstabilityChromosomal InstabilityRad51 RecombinaseCell Line, TumorGenes, FungalApoptosisMethyl MethanesulfonateRecombination, GeneticChromosome SegregationAmino Acid SequenceCyclin-Dependent Kinase Inhibitor p21Cell DivisionAtaxia TelangiectasiaModels, BiologicalHistonesRadiation ToleranceMetaphaseDNA HelicasesCyclinsCyclin B1Calcium-Binding ProteinsProtein Kinase InhibitorsRepressor ProteinsRNA, Small InterferingDNAEnzyme ActivationGene DeletionMeiosisReplication Protein AChromosomal Proteins, Non-HistoneAnaphaseCell NucleusBase SequenceAurora KinasesBRCA1 ProteinFibroblastsG1 Phase Cell Cycle CheckpointsAneuploidyUbiquitin-Protein Ligase ComplexesCyclin-Dependent KinasesCarrier ProteinsAnaphase-Promoting Complex-CyclosomeCell SurvivalRNA InterferenceFlow CytometryPhosphatidylinositol 3-KinasesEndonucleasesProtein Structure, TertiaryChromatin