Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensZebrafish ProteinsForelimbSalamandridaeAnimal FinsEmbryo, NonmammalianPlanariansAnimals, Genetically ModifiedGene Expression Regulation, DevelopmentalTailTriturusIn Situ HybridizationAmputationBody PatterningLarvaUrodelaMorpholinosPleurodelesWilms TumorMolecular Sequence DataMorphogenesisNerve TissueHomeodomain ProteinsZebrafishAmino Acid SequenceMesodermCell DifferentiationAnimal StructuresGenes, HomeoboxFibroblast Growth FactorsAnaplasiaCell DedifferentiationLateral Line SystemAmputation StumpsWound HealingSignal TransductionPentosan Sulfuric PolyesterTretinoinBase SequenceHedgehog ProteinsCartilageRhombencephalonEpidermisT-Box Domain ProteinsSomitesEmbryonic DevelopmentSequence Homology, Amino AcidDNA, ComplementaryTranscription FactorsGene Knockdown TechniquesCell ProliferationDermisMutationSequence AlignmentCloning, MolecularModels, AnimalLimb BudsWnt ProteinsGene ExpressionXenopus laevisGreen Fluorescent ProteinsModels, BiologicalOligonucleotides, AntisenseNodal Signaling LigandsPAX7 Transcription FactorStem CellsImmunohistochemistryRNA, MessengerGastrulationMSX1 Transcription FactorNotochordChoristomaCellular MicroenvironmentDenervationDNA PrimersPhylogenyGene Expression ProfilingPhenotypeReverse Transcriptase Polymerase Chain ReactionXenopus ProteinsHeadCell LineageGene Expression RegulationTenascinMultipotent Stem CellsHindlimbTime FactorsCell MovementBranchial RegionOrganogenesisBlastulaCell TransplantationBromodeoxyuridineTrans-Activators