PSMB9 and nasopharyngeal carcinoma: Of note, latency II gene expression is known to play a primary role in the pathogenesis of NPC (138), resulting in the expression of latent genes such as EBV nuclear antigen 1 (EBNA1), LMP1, LMP2, EBV-encoded small RNAs (EBER), Bam-HI A right frame (BARF) proteins, BARTs, and BART microRNAs (miR-BARTs).