DNA methylation
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Revision as of 22:25, 1 December 2017 by imported>DongWoo Park (Created page with "<p>DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the seq...")
DNA methylation is a process by which methyl groups are added to the DNA molecule. Methylation can change the activity of a DNA segment without changing the sequence. When located in a gene promoter, DNA methylation typically acts to repress gene transcription. DNA methylation is essential for normal development and is associated with a number of key processes including genomic imprinting, X-chromosome inactivation, repression of transposable elements, agingand carcinogenesis. Two of DNA's four bases, cytosine and adenine, can be methylated.
