Cell CycleEuglena gracilisParamecium tetraureliaEukaryotaChlorophytaEvolution, MolecularModels, BiologicalCell Cycle ProteinsBiological EvolutionMolecular Sequence DataSaccharomyces cerevisiaePhylogenyProtozoan ProteinsAmino Acid SequenceApoptosisSpecies SpecificityCell Cycle CheckpointsG1 PhaseSpheroids, CellularCell DivisionMitosisS PhaseCyclinsVolvoxMutationCell ProliferationMenstrual CycleG2 PhaseSignal TransductionDictyosteliumBase SequenceCyclin-Dependent Kinase Inhibitor p21Cyclin-Dependent Kinase Inhibitor p27Cell Line, TumorRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsCell LineTime FactorsProtein-Serine-Threonine KinasesTranscription FactorsDNA-Binding ProteinsPhosphorylationMyxococcus xanthusDNA ReplicationCDC2 Protein KinaseG0 PhaseDNA DamagePhenotypeTumor Suppressor Protein p53Nuclear ProteinsCell DifferentiationCells, CulturedG1 Phase Cell Cycle CheckpointsFlow CytometryCaenorhabditis elegansTumor Cells, CulturedCyclin-Dependent Kinase 2Gene Expression RegulationTranscription, GeneticRNA, MessengerCell NucleusCyclin D1Cell SurvivalCyclin EMorphogenesisGenes, cdcSequence Homology, Amino AcidInterphaseCyclin AFungal ProteinsCyclin BGene Expression Regulation, DevelopmentalSaccharomyces cerevisiae ProteinsTumor Suppressor ProteinsDNACyclin-Dependent Kinase 4HeLa CellsProtein BindingGene Expression ProfilingCDC2-CDC28 KinasesDrosophila ProteinsCell Aggregationcdc25 PhosphatasesBlotting, WesternEstrous CycleDrosophila melanogasterSequence AlignmentProtein KinasesBacterial ProteinsE2F Transcription FactorsMicroscopy, FluorescenceRNA InterferenceSchizosaccharomycesDrosophilaCulture MediaCloning, MolecularBacteriaCyclin B1Sequence Analysis, DNAAntineoplastic Agents