“Here, we show that the level … trimethylation of histone H3 on lysine 27 , a hallmark of the activity of EZH2, a component of repressive Polycomb Group (PcG) complexes … PRC2, is increased on reactivation of the silenced allele by either the DNA demethylating agent 5-azadeoxycytidine or the … inhibitor splitomicin.”