Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbCell ProliferationMesodermSalamandridaeCell DifferentiationAnimal FinsPlanariansCells, CulturedTriturusSignal TransductionIn Situ HybridizationTailGene Expression Regulation, DevelopmentalCell DivisionMesenchymal Stromal CellsMorphogenesisImmunohistochemistryCartilageAmputationCell MovementRNA, MessengerApoptosisWound HealingStem CellsZebrafishUrodelaNerve TissueEpithelial CellsBromodeoxyuridineFibroblastsLimb BudsPleurodelesWilms TumorChick EmbryoCell Line, TumorFibroblast Growth FactorsHomeodomain ProteinsMolecular Sequence DataReverse Transcriptase Polymerase Chain ReactionGene ExpressionTranscription FactorsGene Expression RegulationCell LineChondrogenesisEpitheliumMice, Inbred C57BLCell CycleExtracellular MatrixTime FactorsMice, TransgenicTransforming Growth Factor betaBase SequencePalateHedgehog ProteinsEpidermisCell LineageOsteogenesisTretinoinCell SurvivalBlotting, WesternBody PatterningModels, BiologicalMice, KnockoutOsteoblastsDermisWnt ProteinsAmino Acid SequenceBone Morphogenetic ProteinsZebrafish Proteinsbeta CateninBone Morphogenetic Protein 2AnaplasiaMultipotent Stem CellsProliferating Cell Nuclear AntigenGenes, HomeoboxCell DedifferentiationLymphocyte ActivationUreterCollagenPhenotypeOdontogenesisAnimals, Genetically ModifiedFlow CytometryHeart ValvesPlatelet-Derived Growth FactorAmputation StumpsGene Expression ProfilingCell Culture TechniquesAnimal StructuresToothPentosan Sulfuric PolyesterEmbryo, MammalianDNA Primers