Cell CycleG2 PhaseG2 Phase Cell Cycle CheckpointsS Phase Cell Cycle CheckpointsCell Cycle ProteinsG1 Phase Cell Cycle CheckpointsG1 PhaseM Phase Cell Cycle CheckpointsS PhaseCell Cycle CheckpointsGene Products, vprDNA DamageCheckpoint Kinase 2Cell DivisionMitosisGenes, cdcProtein-Serine-Threonine KinasesPhosphorylationAtaxia Telangiectasia Mutated ProteinsCell Line, TumorTumor Suppressor Protein p53Cyclin-Dependent Kinase Inhibitor p21cdc25 PhosphatasesCyclinsProtein KinasesCDC2 Protein KinaseDNA RepairApoptosisDNA-Binding ProteinsTumor Suppressor ProteinsCyclin B1DNA ReplicationCell ProliferationNuclear ProteinsRetinoblastoma ProteinCyclin BGamma RaysHydroxyureaG0 PhaseCyclin-Dependent Kinase 2Ataxia TelangiectasiaFlow CytometryRadiation, IonizingCyclin-Dependent Kinase Inhibitor p27Cell LineSpindle ApparatusSignal TransductionHeLa CellsCyclin D1MutationCyclin ERadiation ToleranceSaccharomyces cerevisiae ProteinsCell SurvivalSaccharomyces cerevisiaeCyclin-Dependent KinasesUltraviolet RaysTumor Cells, CulturedGenomic InstabilitySchizosaccharomycesCyclin-Dependent Kinase 4NocodazoleFibroblastsMolecular Sequence DataModels, BiologicalCells, CulturedRNA, Small InterferingSchizosaccharomyces pombe ProteinsCell NucleusBlotting, WesternHistonesInterphaseDNACyclin AFungal ProteinsCDC2-CDC28 KinasesDNA Breaks, Double-StrandedAntineoplastic AgentsMimosineAntineoplastic Agents, PhytogenicChromosomal InstabilityTranscription FactorsMenstrual CycleBRCA1 ProteinAmino Acid SequenceTime FactorsGenes, p53Protein BindingAphidicolinGene Expression Regulation, NeoplasticAllyl CompoundsBase SequenceKinetochoresIntracellular Signaling Peptides and ProteinsBromodeoxyuridineDose-Response Relationship, RadiationCarrier ProteinsProliferating Cell Nuclear AntigenGene Expression RegulationTranscription, Genetic