Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensMesodermConnective Tissue CellsForelimbTooth GermToothMorphogenesisSalamandridaeOdontogenesisCell DifferentiationIn Situ HybridizationMesenchymal Stromal CellsEpitheliumEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalImmunohistochemistryEmbryo, MammalianAnimal FinsCells, CulturedChick EmbryoConnective TissuePlanariansRNA, MessengerTriturusEpithelial CellsGene ExpressionTailSignal TransductionBone Marrow CellsAmputationGranulation TissueUrodelaPleurodelesWilms TumorFibroblastsNerve TissueWound HealingZebrafishMicroscopy, ElectronAnaplasiaAmputation StumpsSynovial MembraneMolecular Sequence DataCell DedifferentiationAnimal StructuresPentosan Sulfuric PolyesterCell ProliferationExtracellular MatrixMicrodissectionGenes, HomeoboxAmino Acid SequenceModels, BiologicalTime FactorsZebrafish 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 BudsChoristomaDenervationCulture TechniquesGene Expression ProfilingXenopus ProteinsPAX7 Transcription FactorXenopus laevisHindlimbMultipotent Stem CellsApoptosisLiverHistocytochemistryTenascinCell MovementEmbryo, NonmammalianLarvaRabbits