XenopusCell CycleXenopus laevisXenopus ProteinsEmbryo, NonmammalianNeuromuscular JunctionCell Cycle ProteinsCell Cycle CheckpointsG1 PhaseMitosisS PhaseMolecular Sequence DataCyclinsCell DivisionG2 PhaseAmino Acid SequenceMenstrual CycleCDC2 Protein KinaseBase SequenceApoptosisCyclin-Dependent Kinase Inhibitor p27Cyclin-Dependent Kinase Inhibitor p21Cell ProliferationRNA, MessengerGene Expression Regulation, DevelopmentalRetinoblastoma ProteinG2 Phase Cell Cycle CheckpointsDNA-Binding ProteinsProtein-Serine-Threonine KinasesPhosphorylationTranscription FactorsDNA ReplicationSignal TransductionOvumCyclin-Dependent Kinase 2Nuclear ProteinsCell LineG0 PhaseCell NucleusCyclin BCell Line, TumorTumor Suppressor Protein p53Transcription, GeneticInterphaseG1 Phase Cell Cycle CheckpointsMicroinjectionsMutationDNACyclin ECyclin D1Time FactorsCloning, MolecularCyclin ADNA DamageGenes, cdcGastrulaCells, Culturedcdc25 PhosphatasesModels, BiologicalSequence Homology, Amino AcidFlow CytometryGene Expression RegulationCDC2-CDC28 KinasesHeLa CellsCyclin-Dependent Kinase 4Tumor Suppressor ProteinsCell DifferentiationProtein BindingEstrous CycleCyclin B1Carrier ProteinsTumor Cells, CulturedSaccharomyces cerevisiaeBlotting, WesternE2F Transcription FactorsIn Situ HybridizationKineticsProtein KinasesGene ExpressionTransfectionDNA, ComplementaryRecombinant Fusion ProteinsSaccharomyces cerevisiae ProteinsBromodeoxyuridineCell SurvivalCyclin DBlastulaHistonesCitric Acid CyclePromoter Regions, GeneticCell ExtractsE2F1 Transcription FactorProto-Oncogene ProteinsEmbryonic InductionMesodermReverse Transcriptase Polymerase Chain ReactionMicrotubule-Associated ProteinsS Phase Cell Cycle CheckpointsDown-RegulationRecombinant Proteins