Limb BudsFibroblastsExtremitiesFibroblast Growth FactorsChick EmbryoLimb Deformities, CongenitalPolydactylyFibroblast Growth Factor 4MesodermFibroblast Growth Factor 2EctodermGene Expression Regulation, DevelopmentalHedgehog ProteinsFibroblast Growth Factor 8MorphogenesisCells, CulturedIn Situ HybridizationForelimbBody PatterningReceptors, Fibroblast Growth FactorCartilageWingEmbryonic InductionLimb SalvageHomeodomain ProteinsBone Morphogenetic ProteinsFibroblast Growth Factor 10HindlimbSkinFibroblast Growth Factor 1Embryo, MammalianSignal TransductionMSX1 Transcription FactorGenes, HomeoboxMolecular Sequence DataReceptor, Fibroblast Growth Factor, Type 2Receptor, Fibroblast Growth Factor, Type 1QuailRNA, MessengerCell LineTrans-ActivatorsCell DivisionPhantom LimbCell DifferentiationTranscription FactorsProteinsBase SequenceAmbystoma mexicanumGene ExpressionMutationRegenerationCollagenAmino Acid SequenceTime FactorsBone Morphogenetic Protein 2ChondrogenesisAvian ProteinsEmbryonic and Fetal DevelopmentGrowth SubstancesSomitesTretinoinCell MovementEctromeliaDNA-Binding ProteinsToesBone Morphogenetic Protein 4PhenotypeImmunohistochemistryGene Expression RegulationMice, TransgenicConnective TissueKruppel-Like Transcription Factors3T3 CellsReceptor, Fibroblast Growth Factor, Type 3Intercellular Signaling Peptides and ProteinsSalamandridaeLegSyndactylyCoturnixMice, Mutant StrainsProto-Oncogene ProteinsTeratogensModels, BiologicalLower ExtremityExtracellular MatrixDermisTransfectionCell ProliferationMice, KnockoutWnt ProteinsPaired Box Transcription FactorsProteoglycansDNADNA PrimersIschemiaWound HealingFeathersCloning, MolecularSOX9 Transcription FactorNotophthalmus viridescens