a 2'-deoxycytidine in DNA + S-adenosyl-L-methionine = an N(4)-methyl-2'-deoxycytidine in DNA + S-adenosyl-L-homocysteine + H(+)
a 2'-deoxycytidine in dna + s-adenosyl-l-methionine = an n(4)-methyl-2'-deoxycytidine in dna + s-adenosyl-l-homocysteine + h(+)
"N(4)-cytosine-specific DNA methylase"
"n(4)-cytosine-specific dna methylase"