Cell CycleCell Cycle ProteinsGenes, cdcProtein KinasesProtein-Serine-Threonine KinasesG2 PhaseMitosisCell Cycle CheckpointsS PhaseDNA DamageG1 PhaseCheckpoint Kinase 2CyclinsPhosphorylationProtein Kinase CCell DivisionDNA-Binding ProteinsCDC2 Protein KinaseMolecular Sequence DataNuclear ProteinsMutationCyclin-Dependent Kinase Inhibitor p21Ataxia Telangiectasia Mutated ProteinsSignal TransductionG2 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53DNA ReplicationCell ProliferationApoptosisCell LineCell Line, Tumorcdc25 PhosphatasesRetinoblastoma ProteinSaccharomyces cerevisiae ProteinsDNA RepairSaccharomyces cerevisiaeCyclin-Dependent KinasesSpindle ApparatusTumor Suppressor ProteinsHydroxyureaBase SequenceFungal ProteinsM Phase Cell Cycle CheckpointsAmino Acid SequenceCyclin-Dependent Kinase 2Cyclin ECyclin BCyclin ASchizosaccharomycesTranscription FactorsCyclin-Dependent Kinase Inhibitor p27Cells, CulturedGene Expression RegulationHeLa CellsCyclin D1Disease ProgressionSchizosaccharomyces pombe ProteinsRNA, MessengerProtein BindingGamma RaysModels, BiologicalTranscription, GeneticTumor Cells, CulturedEnzyme ActivationGenes, FungalCDC2-CDC28 KinasesProtein Kinase InhibitorsIntracellular Signaling Peptides and ProteinsG1 Phase Cell Cycle CheckpointsCyclic AMP-Dependent Protein KinasesCyclin B1E2F Transcription FactorsFlow CytometryMitogen-Activated Protein KinasesCalcium-Calmodulin-Dependent Protein KinasesPhosphatidylinositol 3-KinasesCell NucleusBlotting, WesternTime FactorsDNAGene Expression Regulation, NeoplasticMad2 ProteinsRepressor ProteinsTransfectionFibroblastsCyclin-Dependent Kinase 4MAP Kinase Signaling SystemUltraviolet RaysPromoter Regions, GeneticEnzyme InhibitorsHistonesDown-RegulationCell SurvivalRNA, Small InterferingRadiation, IonizingGene Expression ProfilingProto-Oncogene ProteinsE2F1 Transcription FactorPhenotypeChromosomal Instability