In fact, silencing machinery, which deposits methylation marks on H3.1, works in tandem with the replication machinery. (sciencedaily.com)
Specifically, maternally - inherited DNA methylation marks are important for normal placentation as they specify cellular properties such as adhesiveness and invasive character, as well as determining the correct balance of cell types needed in the placenta.» (sciencedaily.com)
Such methylation marks would normally be erased in the reproductive cells of an animal. (scientificamerican.com)