This so - called epigenetic level of control is based on the localized, and in principle reversible, attachment of simple chemical tags to specific nucleotides in the genome. (sciencedaily.com)
DNA methylation is a mechanism cells use to control gene expression at the epigenetic level. (sciencedaily.com)
Now, new research suggests changes at the epigenetic level — specifically alterations in proteins that affect gene expression, rather than genetic mutations — could be driving childhood ependymomas. (sciencedaily.com)