NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 8,041 terms related to cancer and medicine.

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DNA methyltransferase
(... MEH-thul-TRANZ-feh-rays)
An enzyme (a protein that speeds up chemical reactions in the body) that attaches methyl groups to DNA. A methyl group is a chemical group containing one carbon and three hydrogen atoms. Also called DNA methylase.