The L130 monoclonal antibody specifically binds to CD18 which is also known as β2 integrin. CD18 is an ~90-95 kDa type I transmembrane glycoprotein that is encoded by ITGB2. CD18 associates with the integrin α chains CD11a, CD11b, CD11c, or CD11d to form the LFA-1, Mac-1, p150,95, or αDβ2 heterodimers, respectively. CD18 is expressed on virtually all normal peripheral blood leucocytes. CD18 serves as a leucocyte adhesion receptor and signaling receptor. It is essential for many immune responses that require cell-to-cell contact, such as lymphocyte adhesion, natural killer (NK) cell and T-lymphocyte cytolysis, and T lymphocyte proliferation.
The antibody was conjugated to BD Horizon™ BUV496 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome of BD Horizon BUV395 with an Ex Max of 348-nm and an acceptor dye with an Em Max at 496-nm. BD Horizon BUV496 can be excited by the ultraviolet laser (355 nm) and detected with a 515/30 nm filter with a 450LP. Due to the excitation of the acceptor dye by other laser lines, there may be significant spillover into the channel detecting BD Horizon V500 or BV510 (eg, 525/40-nm filter). However, the spillover can be corrected through compensation as with any other dye combination.