On the chromophoric group of rhodopsin.
D000818:Animals; D002417:Cattle; D002855:Chromatography, Thin Layer; D007536:Isomerism; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry; D014801:Vitamin A / Q000032:analysis
D012168:Retinal Pigments; D014801:Vitamin A