ExtremitiesAmbystoma mexicanumRegenerationTurbellariaLimb BudsNotophthalmusAmbystomaVertebratesNotophthalmus viridescensForelimbLimb Deformities, CongenitalPolydactylyBody PatterningEctodermHedgehog ProteinsFibroblast Growth FactorsChick EmbryoGene Expression Regulation, DevelopmentalSalamandridaeFibroblast Growth Factor 8Fibroblast Growth Factor 4MorphogenesisMesodermEmbryonic InductionZebrafishHomeodomain ProteinsAnimal FinsIn Situ HybridizationAvian ProteinsGenes, HomeoboxZebrafish ProteinsPlanariansWnt ProteinsHindlimbWingT-Box Domain ProteinsTriturusBone Morphogenetic ProteinsMolecular Sequence DataTrans-ActivatorsTailAmputationSignal TransductionModels, BiologicalFibroblast Growth Factor 10Kruppel-Like Transcription FactorsTranscription FactorsUrodelaProteinsCell DifferentiationIntercellular Signaling Peptides and ProteinsPleurodelesLimb SalvageEmbryo, NonmammalianAmino Acid SequenceNerve TissueWilms TumorMice, Mutant StrainsProto-Oncogene ProteinsXenopus ProteinsAnimals, Genetically ModifiedAmputation StumpsPhantom LimbNerve Tissue ProteinsDNA-Binding ProteinsBase SequenceXenopus laevisEvolution, MolecularMutationAnimal StructuresChordata, NonvertebrateAnaplasiaSequence Homology, Amino AcidCartilageWound HealingBiological EvolutionLarvaSequence AlignmentCell DedifferentiationFishesTretinoinLampreysPentosan Sulfuric PolyesterDNA, ComplementaryEpidermisReptilesHagfishesInvertebratesDermisCloning, MolecularMSX1 Transcription FactorLegMusclesLower ExtremityHeadGene ExpressionSpecies SpecificityAmphibiansConserved SequencePAX7 Transcription Factor