The marks influence which genes are expressed or what levels they’re expressed at. Most methylation occurs at specific locations in the DNA, typically on a cytosine (C) that sits next to a guanine (G) ...

There are three different types of DNA methylation in plants: CG, CHH (where H is any base except G), and CHG. In Arabidopsis, CG methylation is found on some genes, but primarily on repeat sequences ...