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site-specific DNA-methyltransferase (adenine-specific)

(Science: enzyme) An enzyme responsible for producing a species-characteristic methylation pattern on adenine residues in a specific short base sequence in the host cell dNA. The enzyme catalyses the methylation of DNA adenine in the presence of s-adenosyl-l-methionine to form DNA containing 6-methylaminopurine and s-adenosyl-l-homocysteine.

Registry number: EC 2.1.1.72