Ambystoma mexicanumRegenerationExtremitiesMorphogenesisTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbSalamandridaeAnimal FinsPlanariansGene Expression Regulation, DevelopmentalTriturusTailIn Situ HybridizationZebrafishMesodermAmputationBody PatterningUrodelaCell DifferentiationPleurodelesEmbryo, NonmammalianWilms TumorZebrafish ProteinsNerve TissueHomeodomain ProteinsUreterAnimals, Genetically ModifiedSignal TransductionMolecular Sequence DataEpidermisFibroblast Growth FactorsGenes, HomeoboxAmino Acid SequenceEpitheliumAnimal StructuresModels, BiologicalAnaplasiaMSX1 Transcription FactorWound HealingCartilageMutationHedgehog ProteinsTranscription FactorsAmputation StumpsCell PolarityLimb BudsDermisCell ProliferationLarvaEpithelial CellsCell DedifferentiationXenopus ProteinsImmunohistochemistryPentosan Sulfuric PolyesterOrganogenesisDrosophila ProteinsWnt ProteinsTretinoinCell MovementBase SequenceT-Box Domain ProteinsExtracellular MatrixMicroscopy, ElectronPhenotypeXenopus laevisDrosophilaCell DivisionHeadStem CellsCell ShapeGene ExpressionFibroblast Growth Factor 10Organ Culture TechniquesOdontogenesisHyphaeTenascinChick EmbryoCellular MicroenvironmentDNA, ComplementaryToothSequence Homology, Amino AcidChoristomaMammary Glands, AnimalDNA PrimersKidneyRNA, MessengerEmbryo, MammalianHindlimbBone Morphogenetic ProteinsTime FactorsHair FollicleDenervationEmbryonic and Fetal DevelopmentCells, CulturedCadherinsMultipotent Stem CellsActins