网络释义专业释义
在细胞分裂中期形成一个凹陷，又称主缢痕(primary constriction)。动粒(kinetochore)：着丝粒区两条染色单体外侧与纺锤体微管相接触的特殊结构。
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Centromere is the primary constriction on the chromosome, a region at which the sister chromatids are held together.
着丝点是染色体的主缢痕，在这个地方姐妹染色单体连在一起。
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Centromere --- The primary constriction on the chromosome, a region at which the sister chromatids are held together and at which the kinetochore is formed.
染色体的主缢痕，使姐妹染色单体连在一起，在其两侧各有一个由蛋白构成的动粒。
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