👉 Demethylation is a process that removes methyl groups from DNA, which are commonly found in proteins and other molecules. This can occur through various mechanisms such as methylation by histones, transcriptional repression, or post-translational modifications such as phosphorylation and ubiquitination. The goal of demethylation is to prevent the formation of harmful products like reactive oxygen species (ROS) and damage to cellular components during cell division.