Telomerase activity in CD138+ myeloma and normal plasma cells by TRAP assay. Telomerase activity in marrow myeloma cells from MM patients (lanes 1-9) and in marrow plasma cells from healthy donors (lanes 10-11) are shown. C indicates PCR-negative control; R8, TA-positive control template; NB, neuroblastoma cell line; H, heat-inactivated control; 36bp, internal standard.