Description: The monoclonal antibody BCL-UP recognizes Bcl-6, also known as B-cell lymphoma 6,which is a member of the POZ family of transcriptional repressors. Bcl-6 is expressed most abundantly in germinal center B cells, as well as in differentiating and activated B cells. This 79 kDa protein is essential for germinal center B cell proliferation and survival. During B cell development, Bcl-6 plays an important role in promoting pre-B cell survival to enable the generation of a diverse B cell repertoire. Moreover, Bcl-6 is expressed constitutively in diffuse large B cell lymphomas (DLBCLs), Burkitt’s lymphoma, and non-Hodgkin’s lymphoma. Reports also suggest expression of Bcl-6 in CD4+ T follicular helper cells and memory T cells. Bcl-6 has been reported to be antagonized by Blimp-1.