We detected the expression of RPA proteins by Western blotting in seven NPC cell lines and observed relatively high RPA3 expression in C666‐1, CNE1 and HNE1 cells and relatively low RPA3 expression in CNE2, HK1, HONE1 and SUNE1 cells (Fig. 2A). The gene discussed is RPA1; the disease is nasopharyngeal carcinoma.