The 17-3-3 antibody reacts with the I-Ek MHC class II alloantigen. It cross-reacts with cells from mice of the H-2r haplotype; reactivity with haplotypes d and p has not been observed. Cells from mice of the H-2b, H-2f, H-2g7, H-2q, and H-2s haplotypes do not express I-E antigen.
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.