Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbEmbryo, NonmammalianOvumCDC2 Protein KinaseMitosisXenopus ProteinsSalamandridaeCaenorhabditis elegansXenopusOocytesCaenorhabditis elegans ProteinsXenopus laevisGene Expression Regulation, DevelopmentalCell CycleMolecular Sequence DataCell DifferentiationAnimal FinsPlanariansAmino Acid SequenceCell Cycle ProteinsTriturusTailAmputationPleurodelesEmbryo, MammalianZebrafishUrodelaIn Situ HybridizationWilms TumorNerve TissueMorphogenesisBlastocystEmbryonic DevelopmentMesodermZebrafish ProteinsBody PatterningAnimals, Genetically ModifiedVitellinsAnaplasiaGastrulaCell AggregationBlastomeresHomeodomain ProteinsAmputation StumpsEmbryonic Stem CellsTretinoinCell LineageCell DedifferentiationAnimal StructuresPentosan Sulfuric PolyesterWound HealingStem CellsBase SequenceCell DivisionChick EmbryoGenes, HomeoboxTeratomaTranscription FactorsCarcinoma, EmbryonalLarvaCells, CulturedSignal TransductionEpidermisDermisTeratocarcinomaBlastulaCartilageCell ProliferationHelminth ProteinsFibroblast Growth FactorsCleavage Stage, OvumEndodermEmbryonal Carcinoma Stem CellsRNA, MessengerModels, BiologicalDNA, ComplementaryMSX1 Transcription FactorImmunohistochemistryGene ExpressionGene Expression RegulationWnt ProteinsCellular MicroenvironmentNuclear Transfer TechniquesCell NucleusTime FactorsLimb BudsStarfishChoristomaDenervationCell MovementCell LinePAX7 Transcription FactorMuscles