DNA夾(英語:DNA clamp)又稱滑鉗[1](sliding clamp)、滑動鉗[2]、滑動壓板、滑行夾,是一種蛋白質的三級結構,為DNA複製過程中的持續合成能力-啟動因子(processivity-promoting factor),是DNA聚合酶III全酶的必要組成,可避免DNA聚合酶與DNA模板分離,並提升DNA合成速率。
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