The 24F antibody reacts with CD86 (B7-2), a member of the Ig superfamily of transmembrane proteins. CD86, a ligand for CD28 and CD152 (CTLA-4), is one of the accessory molecules that plays an important role in T cell-B cell costimulatory interactions. CD86 is predominantly expressed on antigen-presenting cells. It can be upregulated on splenic B cells by in vitro polyclonal activation, such as LPS treatment. 24F mAb is reported to block the costimulatory function of rat CD86 and to immunoprecipitate CD86 from Lewis-S1 cell lysates.HTLV-1-transformed rat T-cell line Lewis-S1
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).