Verification of virus infection efficiency by monitoring GFP expression in K562/G01 cells. (a) Representative images of K562/G01 cells infected with Nrf2-RNAi-LV virus at 488 nm of the nominal optical excitation. Left: merged fluorescent images; middle: FITC fluorescent images; right: transmission photomicrograph at the bright light. Magnification, 10x. (b) Representative histogram plots showed the percentages of GFP-positive cells in uninfected blank K562/G01 cells, NC-GFP-LV-infected cells, and Nrf2-RNAi-LV-infected cells.