Additionally, seven EBV transcripts found in B-cells (EBER l and ll, EBNA-1 transcribed from either the Cp or Wp promoters, the BamHI rightward reading frame 1), a viral member of the Bcl-2 family of apoptosis-regulating proteins (BHRF-1), LMP-1 and LMP-2 were negative in the breast cancer biopsies. Here, PSMB9 is linked to breast carcinoma.