The 19.2 monoclonal antibody specifically binds to CD206 which is also known as the macrophage mannose receptor (MMR) or C-type lectin domain family 13 member D (CLEC13D). CD206 is a type I transmembrane glycoprotein of approximately 162 kDa which binds to glycoconjugates containing mannose, fucose, or N-acetylglucosamine. These carbohydrates are present on the surface of many microorganisms and enable the macrophage to bind to microorganisms through the MMR and internalize them during the process of phagocytosis. CD206 is expressed on human macrophages, endothelial cells, and cultured dendritic cells. It is not detected on resting monocytes. Mannose receptor expression is upregulated on peripheral blood mononuclear cells following 3 day incubation with GM-CSF.
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).