The TU169 monoclonal antibody specifically binds to the human Major Histocompatibility Complex (MHC) Class II HLA-DQ1 and DQ2 antigens and weakly to HLA-DQ3. HLA-DQ antigens exits as heterodimers comprised of polymorphic transmembrane HLA-DQ alpha and beta glycoproteins. HLA-DQ is expressed primarily on B cells, monocytes, macrophages, dendritic cells and activated T lymphocytes. HLA-DQ is involved in presenting peptidic antigens to CD4+ T lymphocytes. This antibody does not cross-react with HLA-DR2 and HLA-DR7. This antibody fixes complement.
The antibody was conjugated to BD Horizon™ BUV805 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome of BD Horizon BUV395 with an Ex Max of 348 nm and an acceptor dye with an Em Max at 805 nm. BD Horizon Brilliant BUV805 can be excited by the ultraviolet laser (355 nm) and detected with a 820/60 filter and a 770LP.