Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbLimb BudsSalamandridaeCrystallography, X-RayModels, MolecularAnimal FinsPlanariansAmputationLimb SalvageLimb Deformities, CongenitalTriturusMolecular Sequence DataTailPhantom LimbProtein ConformationAmino Acid SequenceBinding SitesProtein BindingUrodelaHindlimbProtein Structure, TertiaryGene Expression Regulation, DevelopmentalMolecular Docking SimulationPleurodelesMorphogenesisCatalytic DomainIn Situ HybridizationAmputation StumpsLegNerve TissueWilms TumorProtein Structure, QuaternaryLower ExtremityMultiprotein ComplexesSoftwareModels, BiologicalStructural Homology, ProteinZebrafishSequence Homology, Amino AcidIschemiaMesodermBase SequenceProtein Interaction MappingHydrogen BondingProtein Structure, SecondarySequence AlignmentProteinsBody PatterningCrystallizationProtein Interaction Domains and MotifsWound HealingFibroblast Growth FactorsCartilageGenes, HomeoboxAnaplasiaComputational BiologyMutationStructure-Activity RelationshipHomeodomain ProteinsNucleic Acid ConformationNuclear Magnetic Resonance, BiomolecularAlgorithmsSubstrate SpecificityCell DifferentiationTime FactorsHedgehog ProteinsArmAnimal StructuresMicroscopy, ElectronComputer SimulationSignal TransductionCrystallographyCell DedifferentiationPentosan Sulfuric PolyesterMSX1 Transcription FactorLoop of HenleTretinoinModels, ChemicalCatalysisUpper ExtremityZebrafish ProteinsSequence Analysis, ProteinLigandsMolecular StructureDatabases, ProteinEpidermisMolecular ConformationAnimals, Genetically ModifiedStatic ElectricityDermisHydrophobic and Hydrophilic InteractionsTranscription FactorsGene Expression