title: 100 years of the visual cycle.
abstract: One--hundred years have passed since Franz Boll and Willy Kühne first characterized rhodopsin and discovered the visual pigment cycle. Some of the events and individuals of that period are described, and color photographs are presented to show the appearance of rhodopsin in the living retina.
mesh_terms: D000818:Animals; D001001:Anura; D005858:Germany; D049672:History, 19th Century; D010857:Pigment Epithelium of Eye / Q000378:metabolism; D011817:Rabbits; D011894:Rana pipiens; D012168:Retinal Pigments / Q000266:history* / Q000502:physiology; D012243:Rhodopsin / Q000266:history / Q000502:physiology
chemical_list: D012168:Retinal Pigments; D012243:Rhodopsin