Yacob A, Kunz Y W
Cell Tissue Res. 1977 Jul 19;181(4):487-92. doi: 10.1007/BF00221770.
Electron microscopical observations show that the cones in the retina of the diurnal Poecilia reticulata shed their membranous outer segment disks. This occurs at the side of the disk which is open to the extracellular space. Shedding is observed in single and twin cones and occurs at any level of the outer segment. The disks are not discarded in packages or as single disks, but are shed in small vesicular portions. This mode of 'disk shedding' may explain why in cone outer segments radioactively labelled replacement protein is diffusely distributed.
电子显微镜观察表明，日行性孔雀鱼视网膜中的视锥细胞会脱落其膜状外节盘。这种脱落发生在盘面向细胞外空间的一侧。在单视锥细胞和双视锥细胞中均观察到脱落现象，且发生在外节的任何水平。这些盘不是成组或单个被丢弃，而是以小泡状部分脱落。这种“盘脱落”模式或许可以解释为什么在视锥细胞外节中放射性标记的替代蛋白呈弥散分布。
