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Epigenetic alteration
Pronunciation
A change in the chemical structure of DNA that does not change the DNA coding sequence. Epigenetic alterations occur in the body when chemical groups called methyl groups are added to or removed from DNA or when changes are made to proteins called histones that bind to the DNA in chromosomes. These changes may occur with age and exposure to environmental factors, such as diet, exercise, drugs, and chemicals. They can affect a person’s risk of disease and may be passed from parent to child. Also called epigenetic variant and epimutation. (NCI Dictionary)
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