Limb BudsExtremitiesLimb Deformities, CongenitalPolydactylyChick EmbryoFibroblast Growth Factor 4MesodermLimb SalvageHedgehog ProteinsGene Expression Regulation, DevelopmentalEctodermForelimbMorphogenesisPhantom LimbFibroblast Growth Factor 8Fibroblast Growth FactorsBody PatterningIn Situ HybridizationHindlimbWingCartilageEmbryonic InductionHomeodomain ProteinsBone Morphogenetic ProteinsLegMSX1 Transcription FactorGenes, HomeoboxAmbystoma mexicanumLower ExtremityQuailIschemiaAmputationRegenerationTrans-ActivatorsToesEctromeliaEmbryo, MammalianChondrogenesisFibroblast Growth Factor 10Bone Morphogenetic Protein 2Transcription FactorsAvian ProteinsSalamandridaeSomitesEmbryonic and Fetal DevelopmentArmProteinsSyndactylyMuscle, SkeletalTretinoinMolecular Sequence DataLoop of HenleBone Morphogenetic Protein 4Upper ExtremityTeratogensNotophthalmus viridescensTime FactorsSignal TransductionCell DifferentiationKruppel-Like Transcription FactorsPaired Box Transcription FactorsAmbystomaCoturnixMutationWnt ProteinsSOX9 Transcription FactorFeathersBase SequenceMusclesFootMice, TransgenicMice, Mutant StrainsAmino Acid SequenceT-Box Domain ProteinsAmputeesGene ExpressionBone and BonesChimeraUlnaDNA-Binding ProteinsModels, BiologicalEmbryonic DevelopmentBiomechanical PhenomenaOrgan Culture TechniquesAmputation StumpsVertebratesEmbryo, NonmammalianUreterLeg InjuriesIntercellular Signaling Peptides and ProteinsMyogenic Regulatory Factor 5ElaeagnaceaePhenotypeImmunohistochemistryMovementFemoral ArteryOrganogenesisRNA, MessengerHumerusMuscle Development