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™ BV421 which is part of the BD Horizon Brilliant Violet™ family of dyes. With an Ex Max of 407-nm and Em Max at 421-nm, BD Horizon BV421 can be excited by the violet laser and detected in the standard Pacific Blue™ filter set (eg, 450/50-nm filter). BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue™ conjugates.