title: Hedgehog, the floor plate, and the zone of polarizing activity.
authors.affiliation: Laboratory of Developmental Biology, National Institute for Medical Research, Mill Hill, London, England.
authors.forename: J C
authors.initials: JC
authors.lastname: Smith
mesh_terms: D000818:Animals; D029721:Drosophila Proteins; D004627:Embryonic Induction; D053823:Hedgehog Proteins; D009024:Morphogenesis; D009420:Nervous System / Q000196:embryology*; D011506:Proteins / Q000502:physiology*; D014212:Tretinoin / Q000378:metabolism
chemical_list: D029721:Drosophila Proteins; D053823:Hedgehog Proteins; D011506:Proteins; C077245:hh protein, Drosophila; D014212:Tretinoin