Cell CycleS Phase Cell Cycle CheckpointsG2 Phase Cell Cycle CheckpointsG1 Phase Cell Cycle CheckpointsM Phase Cell Cycle CheckpointsCell Cycle ProteinsG2 PhaseCell Cycle CheckpointsDNA DamageCheckpoint Kinase 2S PhaseG1 PhaseGenes, cdcAtaxia Telangiectasia Mutated ProteinsMitosisProtein-Serine-Threonine KinasesTumor Suppressor Protein p53Protein Kinasescdc25 PhosphatasesDNA RepairCyclin-Dependent Kinase Inhibitor p21DNA-Binding ProteinsCDC2 Protein KinaseCyclinsPhosphorylationCell DivisionApoptosisTumor Suppressor ProteinsCyclin B1Cell Line, TumorDNA ReplicationGamma RaysNuclear ProteinsAtaxia TelangiectasiaHydroxyureaRadiation, IonizingCell ProliferationCyclin BSpindle ApparatusRetinoblastoma ProteinCell LineRadiation ToleranceFlow CytometryMutationSignal TransductionG0 PhaseCyclin-Dependent Kinase 2HeLa CellsCyclin-Dependent KinasesCyclin-Dependent Kinase Inhibitor p27Genomic InstabilityCyclin D1Ultraviolet RaysCyclin ESaccharomyces cerevisiae ProteinsCell SurvivalSaccharomyces cerevisiaeMolecular Sequence DataNocodazoleSchizosaccharomycesFibroblastsTumor Cells, CulturedDNASchizosaccharomyces pombe ProteinsDNA Breaks, Double-StrandedRNA, Small InterferingDNA Restriction EnzymesHistonesCyclin-Dependent Kinase 4Models, BiologicalBlotting, WesternChromosomal InstabilityCells, CulturedCaloric RestrictionAntineoplastic Agents, PhytogenicCell NucleusFungal ProteinsBase SequenceBRCA1 ProteinMimosineAntineoplastic AgentsAllyl CompoundsPolymorphism, Restriction Fragment LengthInterphaseGenes, p53Amino Acid SequenceCDC2-CDC28 KinasesKinetochoresAphidicolinCyclin ATranscription FactorsProtein BindingDose-Response Relationship, RadiationIntracellular Signaling Peptides and ProteinsTime FactorsGene Expression Regulation, NeoplasticDNA Repair EnzymesMethyl MethanesulfonateCaffeineCarrier Proteins