3552316 O6-MeG O6-methylguanine 171 3088240 O6MG O6-methylguanine 62 2097848 O6-meGua O6-methylguanine 39 1156560 m6G O6-methylguanine 24 3336622 O6-mGua O6-methylguanine 21 1235447 MeG O6-methylguanine 7 543492 6MG O6-methylguanine 3 3552321 O6 MeG O6-methylguanine 3 3772705 m6Gua O6-methylguanine 3 273090 MG O6-methylguanine 2 3335700 O6-metG O6-methylguanine 2 2235528 6MGua O6-methylguanine 1 2635671 MeGua O6-methylguanine 1 519542 O6-methylG O6-methylguanine 1