title: Ultraviolet visual pigment in a vertebrate: a tetrachromatic cone system in the dace.
abstract: Microspectrophotometric measurements of optically isolated photoreceptors in the Japanese dace, a cyprinid fish, revealed four spectroscopically distinguishable cone pigments and one rod pigment. A visual pigment that absorbs in the near ultraviolet was found in small single cones.
mesh_terms: D000818:Animals; D003530:Cyprinidae / Q000378:metabolism*; D010786:Photoreceptor Cells / Q000032:analysis*; D012168:Retinal Pigments / Q000032:analysis*; D012374:Rod Cell Outer Segment / Q000032:analysis; D013056:Spectrophotometry, Ultraviolet
chemical_list: D012168:Retinal Pigments