有义链

DNA在转录RNA时,只有一条链会转录成RNA,与RNA序列直接拷贝的脱氧核苷酸序列(以U代替T)的DNA链则为有义链(编码链)。另一条链作RNA合成过程中核糖核苷酸碱基配对的模板,称为反义链(模板链)。

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