Checkpoint Kinase 2Cell Cycle ProteinsDNA DamageCell CycleProtein KinasesProtein-Serine-Threonine KinasesGenes, cdcG2 PhaseAtaxia Telangiectasia Mutated ProteinsMitosisS PhasePhosphorylationCell Cycle Checkpointscdc25 PhosphatasesDNA-Binding ProteinsDNA ReplicationDNA RepairM Phase Cell Cycle CheckpointsSaccharomyces cerevisiae ProteinsSchizosaccharomyces pombe ProteinsSpindle ApparatusSchizosaccharomycesNuclear ProteinsTumor Suppressor ProteinsHydroxyureaSaccharomyces cerevisiaeMutationMad2 ProteinsG2 Phase Cell Cycle CheckpointsFungal ProteinsKinetochoresRad52 DNA Repair and Recombination ProteinIntracellular Signaling Peptides and ProteinsTumor Suppressor Protein p53G1 PhaseCell LineCDC2 Protein KinaseMolecular Sequence DataUltraviolet RaysGamma RaysHeLa CellsDNA, FungalDNA Breaks, Double-StrandedRadiation, IonizingNocodazoleProtein BindingSignal TransductionAmino Acid SequenceCdc20 ProteinsCell Line, TumorCyclin BS Phase Cell Cycle CheckpointsDNA Repair EnzymesGenomic InstabilityApoptosisChromosomal InstabilityEnzyme ActivationRad51 RecombinaseSerineGenes, FungalCell DivisionMethyl MethanesulfonateModels, BiologicalChromosome SegregationRecombination, GeneticCyclin-Dependent Kinase Inhibitor p21Protein Kinase InhibitorsHistonesAtaxia TelangiectasiaRNA, Small InterferingCyclinsRadiation ToleranceCalcium-Binding ProteinsCyclin B1MetaphasePhosphoproteinsDNADNA HelicasesRepressor ProteinsProtein-Tyrosine KinasesCell NucleusBase SequencePhosphatidylinositol 3-KinasesFibroblastsGene DeletionMeiosisBlotting, WesternCyclin-Dependent KinasesCells, CulturedCarrier ProteinsAurora KinasesProtein Structure, TertiaryCell SurvivalReplication Protein AAnaphaseChromosomal Proteins, Non-HistoneRNA InterferenceBRCA1 ProteinTransfectionG1 Phase Cell Cycle Checkpoints