Ambystoma mexicanumRegenerationExtremitiesTurbellariaAmbystomaNotophthalmus viridescensNotophthalmusForelimbSalamandridaeAnimal FinsPlanariansTriturusTailLimb BudsAmputationUrodelaPleurodelesWilms TumorNerve TissueIn Situ HybridizationZebrafishAmputation StumpsAnaplasiaGene Expression Regulation, DevelopmentalWound HealingAnimal StructuresCell DedifferentiationPentosan Sulfuric PolyesterMorphogenesisMesodermHindlimbGenes, HomeoboxCell DifferentiationBody PatterningLimb SalvageCartilageFibroblast Growth FactorsLimb Deformities, CongenitalZebrafish ProteinsEpidermisDermisTretinoinAnimals, Genetically ModifiedHomeodomain ProteinsMSX1 Transcription FactorPhantom LimbCellular MicroenvironmentDenervationChoristomaXenopus ProteinsPAX7 Transcription FactorXenopus laevisMolecular Sequence DataHedgehog ProteinsMultipotent Stem CellsEmbryo, NonmammalianT-Box Domain ProteinsAmino Acid SequenceLarvaTenascinCell ProliferationKidney NeoplasmsDNA, ComplementaryMusclesUreterImmunohistochemistryStem CellsGene ExpressionModels, BiologicalHeadBone and BonesWnt ProteinsLegSignal TransductionBromodeoxyuridineCell TransplantationBase SequenceLower ExtremityHelminth ProteinsTime FactorsKidneyGene Expression RegulationExtracellular MatrixIschemiaKeratinsGene Expression ProfilingDNA Primersbeta CateninMicroscopy, ElectronReceptors, Fibroblast Growth FactorTranscription FactorsCell DivisionSequence AlignmentBlotting, NorthernSequence Homology, Amino AcidSpinal CordReverse Transcriptase Polymerase Chain ReactionModels, AnimalCell LineageArm