Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbSalamandridaeCell DifferentiationAnimal FinsPlanariansTriturusTailMass SpectrometryAmputationUrodelaStem CellsWilms TumorIn Situ HybridizationGene Expression Regulation, DevelopmentalPleurodelesNerve TissueEmbryonic Stem CellsZebrafishMolecular Sequence DataTeratomaTretinoinCell DedifferentiationMesodermImmunohistochemistryHomeodomain ProteinsBody Mass IndexMorphogenesisAnaplasiaCell ProliferationAmputation StumpsAmino Acid SequenceEpidermisWound HealingBase SequenceAnimal StructuresPentosan Sulfuric PolyesterSpermatogoniaGenes, HomeoboxCell LineCells, CulturedFibroblast Growth FactorsCartilageSpectrometry, Mass, Electrospray IonizationGene ExpressionTandem Mass SpectrometryEmbryonal Carcinoma Stem CellsTranscription FactorsZebrafish ProteinsRNA, MessengerAnimals, Genetically ModifiedGene Expression RegulationOctamer Transcription Factor-3Cell LineageBody PatterningSignal TransductionMultipotent Stem CellsLimb BudsReverse Transcriptase Polymerase Chain ReactionTime FactorsMSX1 Transcription FactorCellular MicroenvironmentDermisCell DivisionPluripotent Stem CellsCarcinomaModels, BiologicalEmbryo, MammalianXenopus ProteinsNasopharyngeal NeoplasmsSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationEmbryo, NonmammalianDNA, ComplementaryPAX7 Transcription FactorGene Expression ProfilingMicroscopy, ElectronXenopus laevisChoristomaKeratinsLarvaBromodeoxyuridineHindlimbCell Culture TechniquesKidney NeoplasmsDenervationCarcinoma, EmbryonalStage-Specific Embryonic AntigensDNA PrimersUreterHedgehog ProteinsT-Box Domain ProteinsMusclesHistiocytoma, Malignant FibrousCell Transplantation