The 6.7 monoclonal antibody specifically binds to β2 integrin, a 90-95 kDa transmembrane protein, which associates non-covalently as a heterodimer with the a chains of CD11a, CD11b, or CD11c. CD18 is expressed on lymphocytes, monocytes, and more weakly on granulocytes. LFA-1 has been shown to play an important role in homotypic and heterotypic cellular adhesion in immune and inflammatory responses.
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).