Cell CycleCell Cycle ProteinsCell DivisionGenes, cdcMitosisDNA DamageG2 PhaseCheckpoint Kinase 2Protein-Serine-Threonine KinasesCell Cycle CheckpointsS PhaseProtein KinasesDNA ReplicationSpindle Apparatuscdc25 PhosphatasesAtaxia Telangiectasia Mutated ProteinsG1 PhaseMutationHydroxyureaDNA-Binding ProteinsSchizosaccharomycesDNA RepairNuclear ProteinsSaccharomyces cerevisiaeCDC2 Protein KinaseG2 Phase Cell Cycle CheckpointsSaccharomyces cerevisiae ProteinsFungal ProteinsPhosphorylationTumor Suppressor Protein p53M Phase Cell Cycle CheckpointsCyclinsSchizosaccharomyces pombe ProteinsApoptosisTumor Suppressor ProteinsMolecular Sequence DataCell Line, TumorGenes, FungalGamma RaysCyclin BCell ProliferationModels, BiologicalSignal TransductionMad2 ProteinsBase SequenceTumor Cells, CulturedHeLa CellsCyclin-Dependent Kinase Inhibitor p21Cyclin B1Chromosomal InstabilityCyclin-Dependent KinasesGene Expression Regulation, NeoplasticCell LineRadiation, IonizingCell NucleusFlow CytometryAtaxia TelangiectasiaUltraviolet RaysAmino Acid SequencePhenotypeRNA, Small InterferingRetinoblastoma ProteinDNA, FungalCyclin-Dependent Kinase 2Radiation ToleranceBreast NeoplasmsIntracellular Signaling Peptides and ProteinsCell SurvivalAntineoplastic AgentsProtein BindingG1 Phase Cell Cycle CheckpointsFibroblastsNeoplasm ProteinsRNA, MessengerTime FactorsDNAGenomic InstabilityBlotting, WesternRNA InterferenceHistonesCyclin ANeoplasmsCentrosomeCdc20 ProteinsCells, CulturedInterphaseTransfectionUbiquitin-Protein Ligase ComplexesRepressor ProteinsGene DeletionTranscription, GeneticTranscription FactorsAnaphase-Promoting Complex-CyclosomeCell Nucleus DivisionNocodazoleColonic NeoplasmsChromosome SegregationAllelesCDC2-CDC28 KinasesS Phase Cell Cycle Checkpoints