Cell CycleLife Cycle StagesCell Cycle ProteinsQuality of LifeCell Cycle CheckpointsMenstrual CycleG1 PhaseCell DivisionMolecular Sequence DataMitosisS PhaseSpheroids, CellularCyclinsModels, BiologicalApoptosisMutationCell LineCell ProliferationAmino Acid SequenceVolvoxSignal TransductionEstrous CycleTime FactorsBase SequenceCyclin-Dependent Kinase Inhibitor p21Cell Line, TumorCyclin-Dependent Kinase Inhibitor p27G2 PhaseRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsDictyosteliumDNA ReplicationDNA-Binding ProteinsPhosphorylationCitric Acid CycleProtein-Serine-Threonine KinasesTranscription FactorsCells, CulturedRNA, MessengerCell NucleusTranscription, GeneticCDC2 Protein KinaseG0 PhaseCell DifferentiationNuclear ProteinsFlow CytometryG1 Phase Cell Cycle CheckpointsTumor Cells, CulturedTumor Suppressor Protein p53Gene Expression RegulationDNA DamageCyclin-Dependent Kinase 2Saccharomyces cerevisiaeMyxococcus xanthusCyclin D1HeLa CellsCyclin EPhenotypeGenes, cdcCell SurvivalInterphaseCyclin AGene Expression Regulation, DevelopmentalProtein BindingCyclin BMorphogenesisTumor Suppressor ProteinsSequence Homology, Amino AcidDNACyclin-Dependent Kinase 4Fungal ProteinsGene Expression ProfilingLifeVirus ReplicationPhylogenySaccharomyces cerevisiae ProteinsBlotting, WesternSpores, ProtozoanCDC2-CDC28 KinasesProtozoan ProteinsCaenorhabditis eleganscdc25 PhosphatasesBiological EvolutionProtein KinasesMicroscopy, FluorescenceRNA InterferenceE2F Transcription FactorsPromoter Regions, GeneticAntineoplastic AgentsGene ExpressionTransfectionKineticsFibroblastsCyclin B1Cloning, MolecularDrosophila ProteinsSequence AlignmentHistonesCarrier ProteinsDown-Regulation