Cohen J L, Hueter R E, Organisciak D T
Department of Anatomy, School of Medicine, Wright State University, Dayton, OH 45435.
Vision Res. 1990;30(12):1949-53. doi: 10.1016/0042-6989(90)90014-c.
The visual pigment from the juvenile lemon shark has been extracted and is a homogeneous vitamin A2-based porphyropsin with maximum absorption at 522 nm. This is the first report of a porphyropsin visual pigment extracted from the retina of an elasmobranch. In contrast, the visual pigment from the adult lemon shark yields a homogeneous vitamin A1-based rhodopsin with maximum absorption at 501 nm. We conclude that the porphyropsin of the juvenile lemon shark changes over to a rhodopsin as the animal matures.
幼年柠檬鲨的视觉色素已被提取出来，它是一种基于维生素A2的均匀视紫蓝质，在522纳米处有最大吸收峰。这是首次从软骨鱼类视网膜中提取出视紫蓝质视觉色素的报告。相比之下，成年柠檬鲨的视觉色素产生一种基于维生素A1的均匀视紫红质，在501纳米处有最大吸收峰。我们得出结论，幼年柠檬鲨的视紫蓝质会随着动物成熟转变为视紫红质。
