Cell CycleCyclin D1Cyclin ACyclin ECell Cycle ProteinsCyclin BCyclin B1Cyclin D3Cyclin D2Cyclin A1PhosphorylationCyclin DCyclinsCyclin A2Protein-Serine-Threonine KinasesG1 PhaseMitosisCell Cycle CheckpointsCyclin GS PhaseCDC2 Protein KinaseCyclin G1Cyclin-Dependent Kinase 2Cyclin-Dependent KinasesProtein KinasesCyclin CCyclin-Dependent Kinase 4Cell DivisionCyclin-Dependent Kinase Inhibitor p27Molecular Sequence DataRetinoblastoma ProteinCDC2-CDC28 KinasesG2 PhaseCyclin B2SerineCell LineAmino Acid SequenceCyclin-Dependent Kinase Inhibitor p21Signal TransductionCell ProliferationCyclin TApoptosisCell Line, TumorCyclin HCyclin G2HeLa CellsProtein BindingDNA-Binding ProteinsNuclear ProteinsTumor Suppressor ProteinsMutationEnzyme ActivationCell NucleusTumor Suppressor Protein p53Transcription Factorscdc25 PhosphatasesCells, CulturedMenstrual CycleG0 PhaseTransfectionProto-Oncogene ProteinsThreonineDNA DamageModels, BiologicalG2 Phase Cell Cycle CheckpointsTumor Cells, CulturedRNA, MessengerBlotting, WesternTranscription, GeneticRecombinant Fusion ProteinsDNA ReplicationGene Expression RegulationCyclin-Dependent Kinase 6Base SequencePhosphoserineInterphaseG1 Phase Cell Cycle CheckpointsE2F Transcription FactorsPhosphothreonineMicrotubule-Associated ProteinsFlow CytometryGenes, cdcTime FactorsSaccharomyces cerevisiaeSaccharomyces cerevisiae ProteinsDown-RegulationOncogene ProteinsCasein Kinase IISubstrate SpecificityEnzyme InhibitorsRNA, Small InterferingE2F1 Transcription FactorDNAPromoter Regions, GeneticProtein-Tyrosine Kinases3T3 CellsGlycogen Synthase Kinase 3FibroblastsBinding SitesRecombinant Proteins