Methylation

Methylation
Term	Methylation
Short definition	methylation - (pronounced) (MEH-thuh-LAY-avoid) chemical reaction in the body that attaches a small molecule called a methyl group to DNA, proteins, or other molecules. The addition of methyl groups can affect how some molecules work in the body.
Type	Cancer terms
Specialty	Oncology
Language	English
Source	NCI
Comments

methylation - (pronounced) (MEH-thuh-LAY-avoid) chemical reaction in the body that attaches a small molecule called a methyl group to DNA, proteins, or other molecules. The addition of methyl groups can affect how some molecules work in the body. For example, methylating the DNA sequence of a gene can turn off the gene so it doesn't make a protein. Changes in the methylation patterns of genes or proteins can affect a person's risk of developing a disease such as cancer

External links

• Medical encyclopedia article on Methylation
• Wikipedia's article - Methylation

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