SOX11 and B-cell non-Hodgkin lymphoma: To assess if the previously observed SOX11 promoter methylation and histone modifications in B cell lymphomas are a consequence of tumorgenesis or merely reflect the epigenetic status of the normal counterpart, non-malignant mature B cells from three differentiation stages, including naive, germinal center (GC) and memory B-cells, were FACS-sorted from tonsils (n=6).