Expression of cancer-testis genes in PPCs and tumor plasma cells.

(A) RT-PCR analysis of tumor-antigen expression in XG-1 (lane 1), XG-6 (lane 2), XG-16 (lane 3), MM1 (lane 4), MM2 (lane 5), MM3 (lane 6), B1 to B3 (respectively, lanes 7 to 9), PPC1 to PPC3 (respectively, lanes 10 to 12), EBV-1 (lane 13), EBV-5 (lane 14), and EBV-16 (lane 15). (B) RT-PCR for SSX1 on a panel of 13 HMCLs, 5 plasma cell leukemias, and 12 purified myeloma samples at diagnosis.