CC81LTRBLVGFP cells were incubated for 24 hours to form a confluent monolayer.
Subsequently, the cells were treated with 10mM VPA or 500nM TSA for 24 hours. To evaluate the effect of INF-α on BLV LTR promoter, CC81LTRBLVGFP cells were treated without or with 75, 125, 250, 500 or 1000 U/mL of INF-α for 48 hours. The percentage of GFP positive cells was determined by flow cytometry as described below.