Checkpoint Kinase 2Cell Cycle ProteinsDNA DamageCell CycleProtein KinasesProtein-Serine-Threonine KinasesGenes, cdcG2 PhaseAtaxia Telangiectasia Mutated ProteinsMitosisS PhasePhosphorylationCell Cycle CheckpointsDNA-Binding Proteinscdc25 PhosphatasesDNA RepairDNA ReplicationM Phase Cell Cycle CheckpointsSaccharomyces cerevisiae ProteinsSchizosaccharomyces pombe ProteinsSpindle ApparatusSchizosaccharomycesNuclear ProteinsRad52 DNA Repair and Recombination ProteinTumor Suppressor ProteinsSaccharomyces cerevisiaeHydroxyureaMutationMad2 ProteinsG2 Phase Cell Cycle CheckpointsFungal ProteinsKinetochoresIntracellular Signaling Peptides and ProteinsTumor Suppressor Protein p53Cell LineG1 PhaseMolecular Sequence DataCDC2 Protein KinaseUltraviolet RaysGamma RaysDNA, FungalDNA Breaks, Double-StrandedHeLa CellsProtein BindingRadiation, IonizingNocodazoleSignal TransductionDNA Repair EnzymesAmino Acid SequenceCdc20 ProteinsCell Line, TumorS Phase Cell Cycle CheckpointsCyclin BGenomic InstabilityApoptosisChromosomal InstabilityRecombination, GeneticEnzyme ActivationRad51 RecombinaseGenes, FungalMethyl MethanesulfonateSerineCell DivisionModels, BiologicalChromosome SegregationCyclin-Dependent Kinase Inhibitor p21HistonesProtein Kinase InhibitorsAtaxia TelangiectasiaDNA HelicasesRadiation ToleranceRNA, Small InterferingCyclinsCalcium-Binding ProteinsDNAMetaphaseCyclin B1PhosphoproteinsCell NucleusRepressor ProteinsBase SequenceProtein-Tyrosine KinasesMeiosisGene DeletionPhosphatidylinositol 3-KinasesFibroblastsReplication Protein ABlotting, WesternCells, CulturedCarrier ProteinsProtein Structure, TertiaryCyclin-Dependent KinasesCell SurvivalAurora KinasesBRCA1 ProteinAnaphaseRNA InterferenceChromosomal Proteins, Non-HistoneTransfectionG1 Phase Cell Cycle Checkpoints