The 11-5.2 monoclonal antibody specifically recognizes the α chain of the I-A[k] MHC class II alloantigen. It cross-reacts with cells from mice of the H-2[r] haplotype. mAb 11-5.2 recognizes the Ia.19 determinant, and it's reactivity is dependent upon the presence of Glu at position 75 of the Aα chain. Reactivity with other H-2 haplotypes (e.g., b, d, f, p, q, s) has not been observed.
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.