The RM2-5 monoclonal antibody specifically binds to the immunoglobulin superfamily adhesion molecule, CD2 (LFA-2). CD2 is a type I transmembrane glycoprotein that serves as the the major receptor for CD48 in the mouse. CD2 is involved in T-cell activation, immunoregulation, and thymocyte maturation. In the mouse, CD2 is expressed on peripheral T lymphocytes, B lymphocytes, and NK cells, and a subpopulation of intraepithelial T lymphocytes. CD2 is expressed throughout mouse thymic ontogeny, except for distinct subsets of the CD4-CD8- early thymocytes. In the mouse bone marrow, CD2 is expressed on B220+ sIg+ CD43- pre-B cells, but not on CD43+ pro-B cells. The RM2-5 antibody is one of a set of five anti-mouse CD2 monoclonal antibodies that were classified into two groups according to their mutual competition in binding to cell surface CD2 and which block CD2-mediated cell-cell adhesion.
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).