1-methyladenine + a 2'-deoxyribose 5'-monophosphate in double-stranded DNA + H(+) => an N(1)-methyl-2'-deoxyadenosine in double-stranded DNA + H2O
1-methyladenine + a 2'-deoxyribose 5'-monophosphate in double-stranded dna + h(+) => an n(1)-methyl-2'-deoxyadenosine in double-stranded dna + h2o