DNA methylation is a biological process through which methyl groups are added to the DNA (genetic material). It is used as an epigenetic, i.e., a non-genetic strategy by prokaryotes to perform an array of functions such as gene regulation, repair, and protection against viral invasion using restriction-modification (RM) systems, which function as prokaryotic immune systems.
Click here for original story, Study unravels the role of DNA methylation in oceanic microbial communities
Source: Phys.org