如果复制发生就会产生一个突变 G…0 G...C Deamination G..U Replication A..U
removes the damaged base and repair normal normal base AP endo cleaves here makes 3OH for Pol I
①1®1®1@1®1®1①1@1®1®1®1®1@1@13' B8686868888888 *oooooolooloolololole. DNA (a) glycosylaseI damaged base ®1®1®1®1®1®1®1®1®1®1®1⊙1®1®1 1®1®1®1®1®1®®1®1®1®1®1®1®1® ,糖甘水解酶识别改变了的碱基，把碱基从 阝-糖苷健处切下来，在D%4艇上形成去嘌岭 或去蜜晚位点，镜称为P位点