The TX45 monoclonal antibody recognizes human CD300c which is also known as Leukocyte immunoglobulin-like receptor (LIR), CMRF35-like molecule 6 (CLM-6), or Immunoglobulin superfamily member 16 (IGSF16). CD300c is a type I transmembrane glycoprotein that belongs to the CMRF family within the Ig superfamily. CD300c is primarily expressed on myeloid cells and has also been detected on some T cells, B cells, and NK cells. Amongst freshly-isolated leucocytes, the TX45 antibody only detects CD300c expressed on monocytes. CD300c is involved in the regulation of proinflammatory cytokine production by leucocytes.
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).