Figure 14.32 The LexA protein represses many genes, including repair functions, recA and lexA,. Activation of RecA leads to proteolytic cleavage of LexA and induces all of these genes.

• 挽回系统被称作“复制后修复”，因为它在复制完成后才起作用；也被称作“重组修复”，因为它与基因重组的行为类似。它可以很有效的修复那些由于以损坏链为模板进行复制的而有残缺的子链。见图16.；15例。