Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensConnective Tissue CellsForelimbSalamandridaeAnimal FinsConnective TissuePlanariansTriturusTailAmputationGranulation TissueUrodelaPleurodelesWilms TumorFibroblastsNerve TissueCell DifferentiationWound HealingCells, CulturedMesodermZebrafishImmunohistochemistryIn Situ HybridizationMicroscopy, ElectronAnaplasiaAmputation StumpsSynovial MembraneMolecular Sequence DataCell DedifferentiationAnimal StructuresPentosan Sulfuric PolyesterCell ProliferationExtracellular MatrixMicrodissectionGene Expression Regulation, DevelopmentalRNA, MessengerMorphogenesisGenes, HomeoboxAmino Acid SequenceModels, BiologicalGene ExpressionTime FactorsSignal TransductionZebrafish ProteinsEpidermisGene Expression RegulationDermisSkinGingivaCartilageAnimals, Genetically ModifiedReverse Transcriptase Polymerase Chain ReactionFibroblast Growth FactorsTissue Culture TechniquesTretinoinBody PatterningFluorescent Antibody TechniqueBase SequenceKidneyMSX1 Transcription FactorCell LineCell DivisionCollagenCellular MicroenvironmentHomeodomain ProteinsPlatelet-Derived Growth FactorLimb BudsChoristomaEpitheliumDenervationCulture TechniquesGene Expression ProfilingXenopus ProteinsPAX7 Transcription FactorXenopus laevisHindlimbMultipotent Stem CellsEpithelial CellsApoptosisLiverHistocytochemistryTenascinCell MovementEmbryo, NonmammalianLarvaRabbitsImmunoenzyme TechniquesT-Box Domain ProteinsAdipose TissueKidney NeoplasmsAntibodies, MonoclonalLungAutoradiographyMice, Inbred C57BL