Fig. 1: USP15 expression in MM tissues and cell lines.

a The mRNA expression of USP15 in bone marrow samples from 80 patients with multiple myeloma (MM) and 15 patients with proliferative bone marrow (PBM) was measured by Real-time PCR. The expression of USP15 in five different MM cell lines and in control cells, non-cancerous bone marrow-derived plasma cells, was measured by Real-time PCR (b) and western blotting (c). **P < 0.01 compared with PBM or control