Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbEpithelial CellsGene Expression ProfilingEpitheliumSalamandridaeOligonucleotide Array Sequence AnalysisGene ExpressionGene Expression RegulationReverse Transcriptase Polymerase Chain ReactionCadherinsAnimal FinsPlanariansTranscription FactorsTriturusTailAmputationUrodelaPleurodelesWilms TumorNerve TissueZebrafishIn Situ HybridizationAnaplasiaAmputation StumpsCell DedifferentiationAnimal StructuresPentosan Sulfuric PolyesterWound HealingGene Expression Regulation, DevelopmentalCell DifferentiationMorphogenesisGenes, HomeoboxMesodermZebrafish ProteinsEpidermisDermisCartilageAnimals, Genetically ModifiedFibroblast Growth FactorsTretinoinBody PatterningMSX1 Transcription FactorCellular MicroenvironmentHomeodomain ProteinsLimb BudsChoristomaDenervationXenopus ProteinsPAX7 Transcription FactorXenopus laevisHindlimbMolecular Sequence DataMultipotent Stem CellsTenascinEmbryo, NonmammalianLarvaCell ProliferationAmino Acid SequenceT-Box Domain ProteinsKidney NeoplasmsUreterHedgehog ProteinsStem CellsDNA, ComplementaryImmunohistochemistryHead