The 15E2 monoclonal antibody specifically binds to CD369 which is also known as CLEC7A (C-type lectin domain family 7 member A), Dectin-1 (Dendritic cell-associated C-type lectin 1), or BGR (Beta-glucan receptor). CD369 is a type II transmembrane C-type lectin that contains a C-terminal stalk with a carbohydrate recognition domain (CRD) in the extracellular domain, a transmembrane segment, and an ITAM containing cytoplasmic tail. This protein is highly expressed on dendritic cells. It is also expressed on B cells, monocytes, eosinophils, mast cells, macrophages, endothelial cells, and is lowly expressed on some subsets of T cells. CD369 binds to beta-glucan polymers and functions as a pattern recognition receptor in innate immune response to fungal and bacterial pathogens. The 15E2 antibody can reportedly stimulate dendritic cells to costimulate immune responses.
The antibody was conjugated to BD Horizon™ BV786 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 786-nm. BD Horizon BV786 can be excited by the violet laser and detected in a filter used to detect Cy™7-like dyes (eg, 780/60-nm filter).