Sasaki S, Tashiro Y
J Cell Biol. 1976 Nov;71(2):565-74. doi: 10.1083/jcb.71.2.565.
There are two microtubule systems in the posterior silk gland cells. One is a radial microtubule system in which the microtubules run radially from the basal to the apical cytoplasm and in which fibroin globules (secretory granules of fibroin) and mitochondria are arranged along these microtubules, thus composing a "canal system" which is assumed to be responsible for the intracellular transport of fibroin globules. The other is a circular microtubule system in the apical cytoplasm which is composed of bundles of microtubules and microfilaments running in a circular arrangement around the glandular lumen at an interval of approximately 4 mum at the end of the fifth instar. This system is presumably concerned with secretion and/or intraluminal transport of fibroin.
后部丝腺细胞中有两种微管系统。一种是径向微管系统,其中微管从基部细胞质径向延伸至顶端细胞质,丝心蛋白球(丝心蛋白分泌颗粒)和线粒体沿着这些微管排列,从而构成一个“管道系统”,该系统被认为负责丝心蛋白球的细胞内运输。另一种是顶端细胞质中的环形微管系统,它由微管束和微丝组成,在五龄末期以大约4微米的间隔围绕腺腔呈环形排列。该系统可能与丝心蛋白的分泌和/或管腔内运输有关。