PSMB9 and infection: Although EBV-encoded transcripts and proteins have been detected in patients with NKTCL1, 6, 19–21, that expression pattern has generally been consistent with latency I or II infection, which is characterized by expression of EBNA-1, LMP-1, and LMP-2 genes but no other EBNA genes1, 5, 6, 20, 21.