tight junction (紧密连接) -题库考试答案搜索网

tight junction (紧密连接)

名词解释题

2022-03-12 11:00

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又称为不通透连接（impermeable junction），通常位于上皮顶端两相邻细胞间，在紧密连接处的细胞质膜几乎融合并紧紧结合在一起。
从结构上看，相邻两细胞间的紧密连接是靠紧密蛋白颗粒重复形成的一排排的索将两相邻细胞连接起来，这些蛋白质颗粒的直径只有几个纳米，它们形成连续的纤维，就象是焊接线一样，将相邻细胞间连接起来，并封闭了细胞间的空隙。

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