The MMRI-7 monoclonal antibody specifically recognizes CD205 which is also known as DEC-205, Lymphocyte antigen 75 (Ly-75), or C-type lectin domain family 13 member B (CLEC13B). CD205 is a ~205 kDa type I transmembrane glycoprotein with C-type lectin external domains. DEC-205 is expressed on myeloid and plasmacytoid dendritic cells, thymic epithelial cells, and at lower levels on monocytes, T cells, B cells, and natural killer (NK) cells. DEC-205 likely functions as an endocytic receptor and is involved in antigen uptake and processing.
The antibody was conjugated to BD Horizon™ BV650 which is part of the BD Horizon Brilliant™ Violet family of dyes. This dye is a tandem fluorochrome of BD Horizon BV421 with an Ex Max of 405-nm and an acceptor dye with an Em Max at 650-nm. BD Horizon BV650 can be excited by the violet laser and detected in a filter used to detect APC-like dyes (eg, 660/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there will be spillover into the APC and Alexa Fluor® 700 detectors. However, the spillover can be corrected through compensation as with any other dye combination.