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G - 四链体(G4s)阻碍 DNA 复制的机制及 CMG 解旋酶的新发现
为探究 G4s 如何阻碍 DNA 复制,研究人员利用重组酵母和人类复制体开展研究,发现 G4s 可使 CMG 解旋酶停滞,揭示新机制。 细胞基因组由被称为复制体(replisomes)的大型多亚基复合物进行复制,这些复合物在复制叉处协调亲代 DNA 的解旋和子代 DNA 链的合成。
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