缺失威插入校苷酸引起三联体密码的改变 CATCATCAT CAT CAT CAT CAT CA C ATC ATCATCATC 1.+1 CAT CA C AXT CATCAT CAT 3 CAX TXC ATX CATCAT CAT缺失或插入核苷酸引起三联体密码的改变 CAT CAT CAT CAT CAT CAT CAT CAC ATC ATC ATC ATC CAT CAC AXT CAT CAT CAT CAX TXC ATX CAT CAT CAT -1 -1, +1 +3