CH ATP MutS MutL MutH ADP+P, CH CH CH: CH, (ATP DNA解链I DNA解徒膨 DNA外切酶I ADP+P ADP+P 或DNA外切降X CH; CH CH; CH, DNA外切南阿 DNA聚合I DNA聚合薛IⅢ CH CH2 CH CH 碱基错配修复过程示意图碱基错配修复过程示意图