Hatae T
J Ultrastruct Res. 1983 Oct;85(1):58-69. doi: 10.1016/s0022-5320(83)90116-8.
The unique and highly specialized structural features of the plasma membrane in the cells of the kidney distal segment of the lamprey, Lampetra japonica, were studied by electron microscopy. The cells of the distal segment are largely filled by a continuous network of cytoplasmic tubules which are derived from the basolateral plasma membrane. Thin sections and freeze-fracture replicas of the membrane of the cytoplasmic tubules show spirally wound parallel rows of particles. The rows are approximately 17 nm apart and are wound at a pitch of approximately 45 degrees with respect to the major axis of the tubules. Another type of membrane specialization was found in the freeze-cleaved surface of the basolateral plasma membrane. It consists of large square aggregations of membrane particles containing 100-400 cuboidal subunits. The distribution of these particles in this cell, as well as in other systems in which they have been noted, suggests a polarization of membrane activity.
通过电子显微镜研究了日本七鳃鳗（Lampetra japonica）肾脏远段细胞中质膜独特且高度特化的结构特征。远段细胞主要由源自基底外侧质膜的连续细胞质小管网络填充。细胞质小管膜的超薄切片和冷冻蚀刻复制品显示出螺旋缠绕的平行颗粒行。这些行彼此相距约17纳米，并且相对于小管的主轴以约45度的螺距缠绕。在基底外侧质膜的冷冻断裂表面发现了另一种膜特化类型。它由包含100 - 400个立方形亚基的大的方形膜颗粒聚集体组成。这些颗粒在该细胞以及其他已发现它们的系统中的分布表明膜活性存在极化现象。
