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™ BV421 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max at 421-nm, BD Horizon BV421 can be excited by the violet laser and detected in the standard Pacific Blue™ filter set (eg, 450/50-nm filter). BD Horizon BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue conjugates.