coughing and smoking cigarettes Young man a cigarette isolated on white background Stock Photo 2 Passive Smoker Coughing Near

5965 7-Methyl-dG, 7-ethyl-dG, O 6 -methyl-dG and O 6 -ethyl-dG could be formed by direct acting methylating or ethylating agents in cigarette smoke (mostly unidentified to date) or from the metabolic activation of nitrosamines such as N -nitrosodimethylamine or N -nitrosodiethylamine

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