We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleMechanisms of polycomb gene silencing: knowns and unknowns.AuthorsSimon JA; Kingston REPublicationNature reviews. Molecular cell biology, 2009, Vol 10, Issue 10, p697ISSN1471-0080Publication typearticleDOI10.1038/nrm2763