title: Retinoic acid: morphogen or more mysteries?
abstract: It has been proposed that retinoic acid is a vertebrate morphogen that can regulate pattern formation in developing limbs. However, recent experiments raise questions about the validity of this hypothesis.
authors.affiliation: Dental Branch, University of Texas, Houston 77030.
authors.forename: R T
authors.initials: RT
authors.lastname: Franceschi
mesh_terms: D000818:Animals; D005121:Extremities / Q000196:embryology*; D009024:Morphogenesis / Q000187:drug effects; D014212:Tretinoin / Q000494:pharmacology*
chemical_list: D014212:Tretinoin