Abstract
DNA methylation is an epigenetic mark that is involved in control mechanisms of a variety of biological processes. Being symmetrically positioned on the two comple-mentary DNA strands the methyl groups represent a clonally inheritable feature of the DNA. Once established during embryogenesis, methylation patterns are maintained for many cell generations by a maintenance methyltransferase. These methylation patterns are interpreted by proteins that interact with the DNA depending on its state of methylation. Since methylation patterns provide a universal code for DNA-protein interactions, it is not surprising that methylation takes part in many biological processes such as: control of gene expression, DNA replication and cell cycle, DNA repair, imprinting, inactivation of the X-chromosome in eutherian females and much more. In essence, DNA methylation patterns fulfill their task by guiding specific proteins to target sites on the DNA.
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Razin, A. (2005). DNA Methylation. In: DNA Methylation and Cancer Therapy. Medical Intelligence Unit. Springer, Boston, MA. https://doi.org/10.1007/0-387-27443-X_1
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