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单词 Zonula Occludens
释义

Zonula Occludens

中文百科

紧密连接 Tight junction

(重定向自Zonula Occludens)
透射电子显微镜下约55,000倍,80kV,负染大鼠肾脏组织的近曲小管 的紧密连接。注意三条密度与蛋白复合物密度对应的暗线,和其间的与细胞间空间对应的明线。

紧密连接(Tight junction),又称闭锁小带(Zonula occludens)、封闭小带,是细胞膜共同构成一个事实上液体无法穿透的屏障的两个细胞间紧密相连的区域。它是一类只在脊椎动物中出现的细胞连接复合物。在无脊椎动物中,相应的连接为间壁连接。

英语百科

Tight junction 紧密连接

(重定向自Zonula Occludens)
TEM of negatively stained proximal convoluted tubule of Rat kidney tissue at a magnification of ~55,000x and 80 kV with Tight junction. Note that the three dark lines of density correspond to the density of the protein complex, and the light lines in between correspond to the paracellular space.

Tight junctions, also known as occluding junctions or zonulae occludentes (singular, zonula occludens), are the closely associated areas of two cells whose membranes join together forming a virtually impermeable barrier to fluid. It is a type of junctional complex present only in vertebrates. The corresponding junctions that occur in invertebrates are septate junctions.

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更新时间:2025/6/18 13:56:10