Trans-tail regulation is the linked post-translational modification of tails on different histones. Two important studies implicate Swd2 as the link between H2B ubiquitylation and H3 methylation. Swd2 is a component of both the SET1 methyltransferase complex and the cleavage and polyadenylation factor CPF, implicating trans-tail regulation in differentiating events at the beginning and end of genes.
