Not all genes are active at all times. DNA methylation is one of several epigenetic mechanisms that cells use to control gene expression. This straightforward experiment demonstrated that it was ...

Because many different genes can be loosely defined as memory-permitting or memory-suppressing, transient changes in gene methylation provide a potential mechanism for temporary recruitment or ...

SAM serves as the methyl donor for biological methylation ... The source of the sulfur for the reaction, and the mechanism of its insertion, are still unresolved and are actively debated.