Figure 8. The accumulation of acetylated histone H3 and H4 protein in retinoblastoma cell lines. Western blot analysis of acetylated histone H3 and H4 (acetyl-H3 and H4) protein levels in retinoblastoma cells treated with (+) or without (–) cotylenin A (CN-A) for 5 days. β-Actin was used as a loading control.