Mouse monoclonal antibodies against the following histone modifications were used: H3K9me2 (m5.1.1) (36 (link)), H3K36me2, H3K36me3, H3K9Ac and H3K14Ac (37 (link),38 (link)). Mouse monoclonal antibodies against epitope tags, i.e. Myc (4A6, Millipore) and FLAG (M2, Sigma), were used in the ChIP assay and immunoblotting. Mouse monoclonal antibody against Pol2 CTD phosphorylated at Ser5 (4H8, Abcam), rabbit polyclonal antibody against the N-terminal half of Rpb1 (39 (link)) and rabbit polyclonal antibody against histone H3 C-terminal (Millipore) were used for immunoblotting.