Cell CycleCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseMolecular Sequence DataCell DivisionS PhaseMitosisCell LineProteasome Endopeptidase ComplexAmino Acid SequenceCyclinsProteinsApoptosisSignal TransductionPhosphorylationMenstrual CycleCell ProliferationG2 PhaseCells, CulturedProtein BindingCell Line, TumorMutationCyclin-Dependent Kinase Inhibitor p21Cyclin-Dependent Kinase Inhibitor p27Retinoblastoma ProteinG2 Phase Cell Cycle CheckpointsProtein-Serine-Threonine KinasesDNA-Binding ProteinsBase SequenceBlotting, WesternRNA, MessengerFlow CytometryUbiquitinTumor Cells, CulturedModels, BiologicalNuclear ProteinsHeLa CellsG0 PhaseRecombinant Fusion ProteinsCDC2 Protein KinaseTime FactorsCell NucleusG1 Phase Cell Cycle CheckpointsTumor Suppressor Protein p53Transcription FactorsProtein TransportCarrier ProteinsCyclin-Dependent Kinase 2Gene Expression RegulationTransfectionSaccharomyces cerevisiaeCyclin D1DNA ReplicationCyclin ECell SurvivalKineticsGenes, cdcTranscription, GeneticDNA DamageCysteine EndopeptidasesCyclin AInterphaseUbiquitinsCyclin BFibroblastsMicroscopy, FluorescenceCyclin-Dependent Kinase 4CytoplasmCell DifferentiationMultienzyme ComplexesFungal ProteinsMembrane ProteinsSaccharomyces cerevisiae ProteinsTumor Suppressor ProteinsSequence Homology, Amino AcidDNAGene ExpressionCDC2-CDC28 KinasesProtein KinasesCloning, MolecularEstrous Cyclecdc25 PhosphatasesEnzyme InhibitorsMicrotubule-Associated ProteinsDown-RegulationProtein Structure, TertiaryRecombinant ProteinsE2F Transcription FactorsLeupeptinsProtein Processing, Post-TranslationalEnzyme ActivationPhosphoproteinsProto-Oncogene ProteinsBinding SitesIntracellular FluidCyclin B1Green Fluorescent ProteinsProteasome InhibitorsImmunohistochemistry