They say:” Alkylation of guanine (O6-AG) is a cytotoxic lesion, although the specific mechanism of this cytotoxicity is not yet fully understood”. They may find an answer in https://t.co/lzhQ7IsbAH it is proposed that alkylation perturb electrons distribution leading to tautomers
@g_girometta
I am ashamed to say that my Japanese was not correct.
We were also considering the Löwdin theory.
https://t.co/9ZhjXcbmIo
It is thought that tautomeric changes in the guanine-cytosine pair occur, weakening the hydrogen bond strength of the adenine-thymine pair. https://t.co/8PWPjtHoLp