basetautomerANH2HHH(imino)AdenineAdenine(amino)HYHNHaNH2NNHH(keto)(enol)GuanineGuanine
(amino) H H N (imino) (keto) (enol) O H base tautomer
basee tautomerNH2HH(amino)Cytosine(imino)Cytosine-CH.CHHNNHH(keto)Thymine(enol)Thymine
(amino) (imino) H H N (keto) O H (enol) base tautomer
b）basetautomer引起DNA复制的碱基错配碱基正常配对CH3aT (k)SugarSugarG (k)c (a)SugarSugar
b) base tautomer引起DNA复制的碱基错配 (a) (k) (k) (a) 碱基正常配对
碱基异构式的错配(a）Ac (i)SugarSugarkCH3GSugarNH(e)Thymine
碱基异构式的错配 (a) H (i) (k) O (e) H
碱基异构式的错配(i)A(a)CSugarSugarCH3(e)G(k)TSugarSugar
碱基异构式的错配 (i) H (a) (e) H (k)