RegenerationExtremitiesNotophthalmus viridescensSalamandridaeAmbystoma mexicanumTurbellariaAmbystomaNotophthalmusForelimbPlanariansAnimal FinsNerve RegenerationLiver RegenerationTriturusTailAmputationUrodelaBone RegenerationPleurodelesZebrafishNerve TissueWilms TumorIn Situ HybridizationWound HealingCell DifferentiationCell DedifferentiationAnaplasiaAmputation StumpsGene Expression Regulation, DevelopmentalAnimal StructuresGuided Tissue RegenerationZebrafish ProteinsPentosan Sulfuric PolyesterAnimals, Genetically ModifiedMorphogenesisCell ProliferationStem CellsEpidermisMesodermDermisGenes, HomeoboxCartilageFibroblast Growth FactorsBody PatterningPAX7 Transcription FactorTretinoinHomeodomain ProteinsDenervationMSX1 Transcription FactorCellular MicroenvironmentHindlimbMolecular Sequence DataLimb BudsMultipotent Stem CellsLarvaXenopus laevisHepatectomyXenopus ProteinsImmunohistochemistryChoristomaEmbryo, NonmammalianSignal Transduction