As shown in Figure 4(a), in the control group, the proportion of cells in G0/G1 phase was about 40%, and in TRAF2-deficient cells, the percentage of G0/G1 cells went up to 60%, proving that the decrease of TRAF2 in NPC cells resulted in G0/G1 arrest. This evidence concerns the gene TRAF2 and nasopharyngeal carcinoma.