Cell CycleApoptosisCell Cycle ProteinsCell Cycle CheckpointsDNA DamageG2 PhaseCheckpoint Kinase 2ChromosomesMitosisGenes, cdcS PhaseProtein-Serine-Threonine KinasesAtaxia Telangiectasia Mutated ProteinsG1 PhaseG2 Phase Cell Cycle CheckpointsChromosome MappingTumor Suppressor Protein p53DNA-Binding ProteinsProtein KinasesDNA RepairTumor Suppressor ProteinsNuclear ProteinsCyclinsCell DivisionDNA ReplicationPhosphorylationCyclin-Dependent Kinase Inhibitor p21M Phase Cell Cycle CheckpointsCell Line, TumorChromosome AberrationsMutationGamma RaysSpindle Apparatuscdc25 PhosphatasesCDC2 Protein KinaseCell LineCyclin BHydroxyureaRadiation, IonizingSignal TransductionMolecular Sequence DataChromosome SegregationAtaxia TelangiectasiaX ChromosomeChromosome BandingG1 Phase Cell Cycle CheckpointsCell ProliferationHeLa CellsFlow CytometryRadiation ToleranceRetinoblastoma ProteinTumor Cells, CulturedSaccharomyces cerevisiae ProteinsCell SurvivalSaccharomyces cerevisiaeGenomic InstabilityChromosomes, HumanCyclin B1SchizosaccharomycesCells, CulturedFibroblastsDNAModels, BiologicalCell NucleusBase SequenceSex ChromosomesS Phase Cell Cycle CheckpointsChromosomes, Human, Pair 1NocodazoleChromosomal InstabilityCyclin-Dependent Kinase 2Schizosaccharomyces pombe ProteinsAmino Acid SequenceChromosome BreakageHistonesUltraviolet RaysChromosomes, BacterialDNA Breaks, Double-StrandedRNA, Small InterferingFungal ProteinsKinetochoresCyclin-Dependent Kinase Inhibitor p27MetaphaseCyclin EBlotting, WesternTime FactorsGenes, p53Chromosomes, Human, Pair 11InterphaseAntineoplastic AgentsCaspasesChromosomes, Human, Pair 7Protein BindingPhenotypeChromosomes, Human, Pair 17Enzyme ActivationIntracellular Signaling Peptides and ProteinsTransfectionCyclin AApoptosis Regulatory Proteins