Efficient formation of the tandem thymine glycol/8-oxo-7,8-dihydroguanine lesion in isolated DNA and the mutagenic and cytotoxic properties of the tandem lesions in Escherichia coli cells.

Abstract excerpt

Reactive oxygen species can induce the formation of not only single-nucleobase lesions, which have been extensively studied, but also tandem lesions. Herein, we report a high frequency of formation of a type of tandem lesion, where two commonly observed oxidatively induced single-nucleobase lesions, that is, thymidine glycol (Tg) and 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG), are vicinal to each other in calf...

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