Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensZebrafish ProteinsForelimbSalamandridaeAnimal FinsLimb BudsEmbryo, NonmammalianPlanariansAnimals, Genetically ModifiedGene Expression Regulation, DevelopmentalTailTriturusIn Situ HybridizationAmputationBody PatterningUrodelaLarvaMorphogenesisLimb SalvageLimb Deformities, CongenitalMorpholinosMolecular Sequence DataPleurodelesWilms TumorMesodermNerve TissueHomeodomain ProteinsAmino Acid SequenceCell DifferentiationZebrafishAmputation StumpsPhantom LimbFibroblast Growth FactorsGenes, HomeoboxHindlimbHedgehog ProteinsAnimal StructuresCartilageWound HealingAnaplasiaSignal TransductionCell DedifferentiationTretinoinLateral Line SystemBase SequenceT-Box Domain ProteinsSomitesPentosan Sulfuric PolyesterEpidermisEmbryonic DevelopmentTranscription FactorsRhombencephalonSequence Homology, Amino AcidDNA, ComplementaryMutationMSX1 Transcription FactorLegWnt ProteinsCell ProliferationModels, BiologicalGene ExpressionCloning, MolecularTime FactorsSequence AlignmentDermisModels, AnimalGene Knockdown TechniquesLower ExtremityImmunohistochemistryXenopus laevisRNA, MessengerGreen Fluorescent ProteinsPAX7 Transcription FactorOligonucleotides, AntisensePhenotypeNotochordDenervationNodal Signaling LigandsChoristomaDNA PrimersStem CellsIschemiaGastrulationPhylogenyMusclesXenopus ProteinsGene Expression ProfilingCellular MicroenvironmentHeadReverse Transcriptase Polymerase Chain ReactionTrans-ActivatorsGene Expression RegulationCell LineageTenascin