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纤毛虫类莱科维真尾藻排泄无孔液泡排放位点处的质膜特化

Plasma membrane specialization at the discharge site of the excretory poreless vacuole of the ciliate Euplotes raikovi.

作者信息

Dallai R, Luporini P, Salvatici P

出版信息

Tissue Cell. 1985;17(3):309-20. doi: 10.1016/0040-8166(85)90050-3.

DOI:10.1016/0040-8166(85)90050-3
PMID:3925593
Abstract

The contractile vacuole of Euplotes raikovi consists basically of a membrane-delimited cistern that has no direct communication with the exterior of the cell. Contiguous alveoli interpose between the cisterna and the plasma membrane and probably receive the cisternal contents before being expelled. The area of the plasma membrane that interacts with the outer membrane of the alveoli overlying the cistern has been found to carry a special region of intramembranous particles organized in 100-200 strands, showing varied sizes and a tendency to align parallel with one another. The region is also characterized by a smooth central core and by characteristic deformations that have been interpreted as focal sites of discharge of the contractile vacuole.

摘要

莱氏游仆虫的伸缩泡基本上由一个膜界定的池组成,该池与细胞外部没有直接连通。相邻的肺泡介于池和质膜之间,可能在被排出之前接收池内的内容物。已发现与覆盖池的肺泡外膜相互作用的质膜区域带有一个特殊的膜内颗粒区域,这些颗粒组织成100 - 200条链,显示出不同的大小并倾向于彼此平行排列。该区域的特征还在于有一个光滑的中央核心以及特征性变形,这些变形被解释为伸缩泡的放电焦点。

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