Breneman J W, Robles L J, Bok D
Exp Eye Res. 1986 Jun;42(6):645-58. doi: 10.1016/0014-4835(86)90053-9.
Retinoid transport and chromophore exchange have been investigated in cephalopods using autoradiographic and radiobiochemical techniques. In dark adapted retinas, [3H]-retinoid is concentrated in myeloid bodies present in the photoreceptor inner segments and is bound to the photopigment retinochrome. In retinas exposed to light, there is a shift in the distribution of [3H]-retinoid. The rhabdomes become more heavily labeled than the inner segments, and rhodopsin labeling exceeds that of retinochrome. In animals returned to the dark, another shift in retinoid distribution occurs and the inner segments are again more labeled than the rhabdomes. In these animals [3H]-retinoid is bound primarily to retinochrome. Exposure to light seems to activate a transport mechanism that results in the redistribution of retinoid between the inner segments and rhabdomes and chromophore exchange among the photopigments.
利用放射自显影和放射生物化学技术，对头足类动物的类视黄醇转运和发色团交换进行了研究。在暗适应的视网膜中，[3H] - 类视黄醇集中在光感受器内段的髓样小体中，并与光色素视紫红质结合。在暴露于光的视网膜中，[3H] - 类视黄醇的分布发生了变化。视杆变得比内段标记更重，视紫红质的标记超过了视紫红质。在回到黑暗中的动物中，类视黄醇分布再次发生变化，内段再次比视杆标记更多。在这些动物中，[3H] - 类视黄醇主要与视紫红质结合。暴露于光似乎激活了一种转运机制，导致类视黄醇在内段和视杆之间重新分布，以及光色素之间的发色团交换。
