Limb BudsExtremitiesBody PatterningWingChick EmbryoGene Expression Regulation, DevelopmentalEctodermForelimbMorphogenesisAmbystoma mexicanumHomeodomain ProteinsMesodermHedgehog ProteinsRegenerationFibroblast Growth Factor 8Notophthalmus viridescensGenes, HomeoboxIn Situ HybridizationFibroblast Growth FactorsLimb Deformities, CongenitalWnt1 ProteinPolydactylyTretinoinEmbryonic InductionFibroblast Growth Factor 4HindlimbBranchial RegionDrosophila ProteinsTranscription FactorsTrans-ActivatorsInsect ProteinsSignal TransductionDrosophilaCartilageModels, BiologicalLimb SalvageCell DifferentiationDrosophila melanogasterMutationGenes, InsectBone Morphogenetic ProteinsMolecular Sequence DataMSX1 Transcription FactorProto-Oncogene ProteinsQuailPhenotypePhantom LimbDNA-Binding ProteinsTime FactorsEmbryo, MammalianChondrogenesisBone Morphogenetic Protein 2Fibroblast Growth Factor 10EctromeliaSomitesEmbryonic and Fetal DevelopmentProteinsToesAvian ProteinsBone Morphogenetic Protein 4SyndactylyLegSalamandridaeTeratogensLower ExtremityKruppel-Like Transcription FactorsPaired Box Transcription FactorsCoturnixFeathersSOX9 Transcription FactorIschemiaWnt ProteinsAmputationBase SequenceAmino Acid SequenceMice, TransgenicMice, Mutant StrainsMuscle, SkeletalAmbystomaChimeraGene ExpressionT-Box Domain ProteinsUreterEmbryonic DevelopmentElaeagnaceaeOrgan Culture TechniquesMuscles