Limb BudsExtremitiesLimb Deformities, CongenitalPolydactylyFibroblast Growth Factor 4Chick EmbryoForelimbEctodermGene Expression Regulation, DevelopmentalHedgehog ProteinsMesodermFibroblast Growth Factor 8Body PatterningFibroblast Growth FactorsMorphogenesisAmbystoma mexicanumIn Situ HybridizationHindlimbHomeodomain ProteinsWingSyndactylyBone Morphogenetic ProteinsCartilageEmbryonic InductionMSX1 Transcription FactorGenes, HomeoboxLimb SalvageTrans-ActivatorsRegenerationFibroblast Growth Factor 10Phantom LimbTranscription FactorsToesAvian ProteinsBone Morphogenetic Protein 4Embryo, MammalianKruppel-Like Transcription FactorsT-Box Domain ProteinsUlnaChondrogenesisTissue TransplantationBone Morphogenetic Protein 2Embryonic and Fetal DevelopmentTretinoinProteinsSignal TransductionVertebratesSalamandridaeTeratogensFoot Deformities, CongenitalMolecular Sequence DataWnt ProteinsHand Deformities, CongenitalMice, Mutant StrainsSOX9 Transcription FactorMutationOrganogenesisZebrafish ProteinsLegLower ExtremityDNA-Binding ProteinsLIM-Homeodomain ProteinsQuailMice, TransgenicBone and BonesBase SequencePaired Box Transcription FactorsBone Morphogenetic Protein 7Cell DifferentiationAmino Acid SequencePhenotypeIschemiaProto-Oncogene ProteinsIntercellular Signaling Peptides and ProteinsAmputationEmbryo, NonmammalianModels, BiologicalXenopus ProteinsTime FactorsEmbryonic DevelopmentAbnormalities, MultipleAbnormalities, Drug-InducedEctromeliaOsteogenesisNerve Tissue ProteinsRNA, MessengerTwist Transcription FactorGene ExpressionOrgan Culture TechniquesBone DevelopmentMusclesGrowth SubstancesCloning, MolecularSomitesChondrocytesArmSequence Homology, Amino AcidDNA PrimersGrowth Differentiation Factor 5Muscle, Skeletal