title: The color purple: milestones in photochemistry.
authors.affiliation: Department of Ophthalmology and Visual Sciences, University of Illinois College of Medicine, 1855 W. Taylor Street M/C 648, Chicago, IL 60612, USA. harrripp@uic.edu
authors.forename: Harris
authors.initials: H
authors.lastname: Ripps
mesh_terms: D000818:Animals; D055253:Color Vision; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D010777:Photochemistry / Q000266:history*; D012160:Retina / Q000502:physiology*; D012243:Rhodopsin / Q000737:chemistry
chemical_list: D012243:Rhodopsin