title: H3K56me1 marks a spot for PCNA.
abstract: In the current issue of Molecular Cell, Yu et al. (2012) establish H3K56 monomethylation (H3K56me1) as a new mammalian chromatin mark, imposed by the G9a methyltransferase and recognized by the replication clamp PCNA.
authors.affiliation: Biotech Research and Innovation Centre, University of Copenhagen, Ole Maaløes Vej 5, DK-2200 Copenhagen, Denmark.
authors.forename: Sung-Bau
authors.initials: SB
authors.lastname: Lee
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Jasencakova
authors.forename: Anja
authors.initials: A
authors.lastname: Groth