The V24-785 monoclonal antibody binds specifically to BDCA-2 (Blood Dendritic Cell Antigen 2), also known as CD303. As a member of the C-type lectin (CLEC) superfamily, it is an adhesion receptor that binds to galactose-terminated desialylated glycans on cell surfaces and on serum IgG. In the blood, BDCA-2 is expressed only on plasmacytoid dendritic cells (pDC). TLR-9 mediates the production of large amounts of IFN-α and IFN-β by activated pDC, and crosslinking of BDCA-2 inhibits that response.
The antibody was conjugated to BD Horizon BUV615 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome with an Ex Max near 350 nm and an Em Max near 615 nm. BD Horizon Brilliant BUV615 can be excited by the ultraviolet laser (355 nm) and detected with a 610/20 filter and a 595 nm LP. Due to the excitation of the acceptor dye by the blue/yellow-green laser line, there may be significant spillover into channels detecting PE-CF594 like emissions (eg, 610/20-nm filter).