DNA demethylation

DNA demethylation is the process by which methyl groups are removed from the DNA molecule, specifically from the cytosine base in the context of DNA methylation. DNA methylation typically occurs at cytosine residues in the context of CpG dinucleotides and is a key epigenetic modification that can regulate gene expression. Methylation often leads to the silencing of gene expression, while demethylation can promote activation.