Staining of a B-cell lymphoma-tissue microarray (TMA) confirmed elevated levels of PRDM15, and nuclear localization, in FL, DLBCL, BL, small lymphocytic-lymphomas (SLL) and mantel cell-lymphomas (MCL), compared to normal tonsil controls (Fig. 1c and Supplementary Fig. 1B, C). Here, PRDM15 is linked to mantle cell lymphoma.