Dictionary of Cancer Terms
View in Spanish: Metiltransferasa de ADN
DNA methyltransferase ( MEH-thul-TRANZ-fer-ays)
An enzyme (a protein that speeds up chemical reactions in the body) that attaches a methyl group to DNA. A methyl group is a chemical group containing one carbon and three hydrogen molecules. Also called DNA methylase.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.