Checkpoint Kinase 2Cell Cycle ProteinsDNA DamageCell CycleProtein KinasesProtein-Serine-Threonine KinasesGenes, cdcG2 PhaseAtaxia Telangiectasia Mutated ProteinsMitosisS PhaseCell Cycle CheckpointsM Phase Cell Cycle CheckpointsDNA ReplicationDNA Repaircdc25 PhosphatasesDNA-Binding ProteinsPhosphorylationSaccharomyces cerevisiae ProteinsSchizosaccharomyces pombe ProteinsSchizosaccharomycesSpindle ApparatusNuclear ProteinsHydroxyureaTumor Suppressor ProteinsSaccharomyces cerevisiaeG2 Phase Cell Cycle CheckpointsMutationKinetochoresFungal ProteinsMad2 ProteinsRad52 DNA Repair and Recombination ProteinTumor Suppressor Protein p53Intracellular Signaling Peptides and ProteinsUltraviolet RaysG1 PhaseDNA Breaks, Double-StrandedCDC2 Protein KinaseGamma RaysDNA, FungalRadiation, IonizingNocodazoleS Phase Cell Cycle CheckpointsMethyl MethanesulfonateGenomic InstabilityHeLa CellsCyclin BCdc20 ProteinsSignal TransductionCell LineMolecular Sequence DataDNA Repair EnzymesChromosomal InstabilityProtein BindingRad51 RecombinaseChromosome SegregationCell Line, TumorGenes, FungalRecombination, GeneticApoptosisCyclin-Dependent Kinase Inhibitor p21HistonesCell DivisionAmino Acid SequenceModels, BiologicalMetaphaseRadiation ToleranceCyclin B1Ataxia TelangiectasiaDNA HelicasesAnaphaseRNA, Small InterferingDNAMeiosisCyclinsReplication Protein ARepressor ProteinsCalcium-Binding ProteinsChromosomal Proteins, Non-HistoneGene DeletionProtein Kinase InhibitorsEnzyme ActivationCell NucleusBRCA1 ProteinExodeoxyribonucleasesAurora KinasesFibroblastsUbiquitin-Protein Ligase ComplexesCell SurvivalAnaphase-Promoting Complex-CyclosomeCyclin-Dependent KinasesEndonucleasesEndodeoxyribonucleasesBase SequenceRNA InterferenceRecombinational DNA RepairCarrier ProteinsExonucleasesNucleic Acid Synthesis InhibitorsG1 Phase Cell Cycle Checkpoints