SEARCH Articles Figures Tables Guanin Guanine Guanine electrochemical oxidation Guanine oxidation Guanine oxidation Guanine oxidation product Guanine oxidation residues Guanine oxidation, label-free electrochemical Guanine radical oxidation Guanine singlet oxygen oxidation Guanine sites, oxidized Oxidative guanine Study 6.31 Biochemistry photocatalytic oxidation of DNA guanine