label: site-specific DNA-methyltransferase (cytosine-N4-specific) activity
label_lc: site-specific dna-methyltransferase (cytosine-n4-specific) activity
description: "Catalysis of the reaction: S-adenosyl-L-methionine + DNA cytosine = S-adenosyl-L-homocysteine + DNA N4-methylcytosine."