Peptide epitopes used for therapeutic vaccines are mostly fragments of EBNA1 and LMP2 genes, which are responsible for cell transformation in nasopharyngeal carcinoma, certainly EBNA1 and LMP2 genes are expressed in latency II inside one hundred percent of EBV-related nasopharyngeal carcinoma. The gene discussed is PSMB9; the disease is nasopharyngeal carcinoma.