交换复活 cross reactivation

互联网2013-11-14

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通过紫外线或X射线等处理而失活的噬菌体在和具有与之互补基因型的活噬菌体进行混合感染时，在其子代噬菌体中会出现带有失活噬菌体部分基因的类型，这种现象称为交换复活，亦称为“标记获救”（ marker rescue）。由于在失活的噬菌体染色体上紧密连锁的二个基因在子代噬菌体中同时出现的机率高，而相距远的基因则多独立出现，所以已明确这种现象是通过遗传重组而产生的。

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