H3K79me3/H3 ChIP-qPCR efficiencies (relative to a non-transcribed region, which was unaffected by RPD3 deletion) in wild-type and in rpd3Δ cells harboring empty or RPD3-encoding CEN plasmids. The H188A and H150A-H151A mutations have previously been shown to abrogate catalytic activity (Kadosh & Struhl, 1998). Error bars indicate standard deviation of three biological replicates. p<0.05 (*), p<0.01 (**) and p<0.001 (***) by two-way ANOVA, comparison to wild type. 