Methylation can change the activity of a DNA segment without changing the sequence.
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DNA methylation - Wikipediat methyl groups. They are bound to two cytosine nucleotide molecules that make up the DNA sequence. DNA methylation is a biological process by which methyl groups are added to the DNA molecule. <span>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. In mammals, DNA methylation is essential for normal development and is associated with a n Summary
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