For 5-methylcytosine staining, the cells were permeabilized with PBS, 0.2% Triton X-100 overnight and DNA was denatured prior to staining with 2N HCl for 30 min at room temperature. Primary antibodies and dilutions (in PBT/BSA) were: H3R2/R8/R26Cit 1:300 (Abcam ab5103, Cambridge, UK)...