The MR10-2 monoclonal antibody reacts with the Vβ9 T-cell Receptor (TCR) of mice having the b haplotype (e.g., A, BALB/c, CBA/Ca, C3H/He, C57BL) of the Tcrb gene complex. The Tcrb-V9 gene locus is deleted in mice having the a (e.g., C57BR, C57L, SJL, SWR) or c (e.g., RIII) haplotype. Vβ9-bearing T lymphocytes are clonally eliminated in mice expressing superantigen encoded by Mtv-7 (Mls-1a, Mlsa) provirus (e.g., AKR, CBA/J, DBA/2), and activation or elimination of Vβ9 TCR-expressing T cells by this determinant is partially dependent upon presentation by I-E. Mtv-43 (e.g., MA/MyJ), Mtv-44 (e.g., NZW), and/or exogenous MMTV-SW superantigens also cause incomplete elimination of Vβ9 TCR-bearing T cells. Plate-bound MR10-2 antibody activates Vβ9 TCR-bearing T cells.
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).