title: Visual purple (sehpurpur).
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Wade
mesh_terms: D000818:Animals; D003118:Color Perception / Q000502:physiology; D005858:Germany; D049672:History, 19th Century; D006801:Humans; D010777:Photochemistry / Q000266:history*; D011173:Portraits as Topic; D012243:Rhodopsin / Q000266:history* / Q000502:physiology
chemical_list: D012243:Rhodopsin