The 25-9-17 monoclonal antibody specifically recognizes the β chain of the I-A[b] MHC class II alloantigen. It crossreacts with cells from mice of the H-2[d], H-2[p], and H-2[q] haplotypes. Reactivity with other haplotypes (eg, a, f, g7, k, r, s) has not been observed. The strain distribution of the antigen recognized by this reagent is similar or identical to that of anti-I-A[d] (Aβ[d]) mAb 34-5-3.
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.