Cell CycleCell Cycle ProteinsEukaryotic CellsCell Cycle CheckpointsMitosisG2 PhaseDNA DamageCheckpoint Kinase 2S PhaseCDC2 Protein KinaseG1 PhaseProtein-Serine-Threonine KinasesGenes, cdcCyclinsCyclin-Dependent KinasesAtaxia Telangiectasia Mutated ProteinsCyclin BG2 Phase Cell Cycle CheckpointsDNA ReplicationMolecular Sequence DataPhosphorylationNuclear ProteinsSaccharomyces cerevisiae ProteinsSaccharomyces cerevisiaeSchizosaccharomycesProtein KinasesTumor Suppressor Protein p53DNA RepairAmino Acid SequenceDNA-Binding ProteinsCyclin-Dependent Kinase 2Tumor Suppressor ProteinsModels, BiologicalCyclin-Dependent Kinase Inhibitor p21Cell Divisioncdc25 PhosphatasesM Phase Cell Cycle CheckpointsGamma RaysHydroxyureaMutationApoptosisSpindle ApparatusRadiation, IonizingAtaxia TelangiectasiaBase SequenceCell LineG1 Phase Cell Cycle CheckpointsHeLa CellsSignal TransductionCell Line, TumorRetinoblastoma ProteinRadiation ToleranceGenomic InstabilityCyclin B1Schizosaccharomyces pombe ProteinsFungal ProteinsCell NucleusS Phase Cell Cycle CheckpointsCell ProliferationNocodazoleFibroblastsUltraviolet RaysDNAFlow CytometryProtein BindingHistonesDNA Breaks, Double-StrandedCyclin ETumor Cells, CulturedCyclin-Dependent Kinase Inhibitor p27Cells, CulturedCDC2-CDC28 KinasesCell SurvivalChromosomal InstabilityCyclin AMenstrual CycleCyclin D1Transcription, GeneticRNA, MessengerBRCA1 ProteinCarrier ProteinsTime FactorsRNA, Small InterferingSequence Homology, Amino AcidGenes, p53Transcription FactorsInterphaseIntracellular Signaling Peptides and ProteinsMimosineGene Expression RegulationKinetochoresTransfectionBlotting, WesternChromatinAphidicolinCyclin-Dependent Kinase 4Protein Structure, TertiaryRecombinant Fusion ProteinsMethyl MethanesulfonateCentrosome