title: Limb patterning: reports of model's death exaggerated.
abstract: The progress zone model for the specification of positional values for patterning the proximodistal axis of the vertebrate limb has been questioned, but the results can be largely reconciled with the old model.
authors.affiliation: Department of Anatomy and Developmental Biology, University College, London, UK.
authors.forename: Lewis
authors.initials: L
authors.lastname: Wolpert
mesh_terms: D000818:Animals; D019521:Body Patterning; D002454:Cell Differentiation; D002455:Cell Division; D002465:Cell Movement; D002642:Chick Embryo; D005121:Extremities / Q000196:embryology*; D008954:Models, Biological