名词解析

kinetochore (动粒)

正确答案

是由着丝粒结合蛋白在有丝分裂期间特别装配起来的、附着于主缢痕外侧的圆盘状结构,内侧与着丝粒结合,外侧与动粒微管结合。每一个中期染色体含有两个动粒,位于着丝粒的两侧。
哺乳动物的动粒可分为三个不同的区域:即内层、中间层和外层,直径约为200nm。

答案解析

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