The 5E7 monoclonal antibody specifically binds to mouse B lymphocyte-induced maturation protein 1 (Blimp-1). Blimp-1 is a 98 kDa zinc finger-containing protein that is encoded by the Prdm1 gene and functions as a transcriptional repressor. Blimp-1 is essential for regulating the terminal differentiation of activated B cells into plasma cells. In this process, Blimp-1 suppresses genes involved in B cell proliferation, such as Myc and Bcl6. It controls other genes, such as Xbp1, that are required for upregulating the plasma cell's protein synthesis machinery which is essential for antibody production and secretion. Blimp-1 is an important regulator in other cell types as well. It functions in the regulation of T cell activation and homeostasis and NK cell maturation. Blimp-1 is expressed in activated T cells and can function to inhibit IL-2 production while enhancing the differentiation and expression of several molecules produced by effector T cells.
The antibody was conjugated to BD Horizon™ BUV395 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. With an Ex Max near 348 nm and an Em Max near 395 nm, BD Horizon™ BUV395 can be excited by the ultraviolet laser (355 nm) laser and detected with a 379/28 filter. This dye has been exclusively developed by BD Biosciences as an optimal dye for use on instruments equipped with the ultraviolet laser and has virtually no spillover into any other detector.