Structures of the visual chromophores and related pigments: a conformational basis of visual excitation.
D002338:Carotenoids; D055598:Chemical Phenomena; D002621:Chemistry; D003461:Crystallography; D008956:Models, Chemical; D012168:Retinal Pigments; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014801:Vitamin A
D012168:Retinal Pigments; D014801:Vitamin A; D002338:Carotenoids