title: Why does a limb look like a limb?
authors.affiliation: Department of Cell Biology and Anatomy, New York Medical College, Valhalla 10595.
authors.forename: S A
authors.initials: SA
authors.lastname: Newman
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000196:embryology; D002356:Cartilage / Q000196:embryology; D005121:Extremities / Q000033:anatomy & histology / Q000196:embryology*; D005801:Genes, Homeobox; D012176:Retinoids
chemical_list: D012176:Retinoids