The 34-5-3 antibody reacts with the β chain of the I-A[d] MHC class II alloantigen. It cross-reacts with I-A[b] and with cells from mice of the H-2[p] and H-2[q] haplotypes. Reactivity with other haplotypes (e.g., a, f, k, r, s) has not been observed. The strain distribution of the antigen recognized by this reagent is similar to that of anti-I-A[b] mAb 25-9-17 (Cat. Nos. 553603, 553604, and 553605).
This antibody is conjugated to BD Horizon™ BV605 which is part of the BD Horizon Brilliant™ Violet family of dyes. With an Ex Max of 407-nm and Em Max of 602-nm, BD Horizon BV605 can be excited by a violet laser and detected with a standard 610/20-nm filter set. BD Horizon BV605 is a tandem fluorochrome of BD Horizon BV421 and an acceptor dye with an Em max at 605-nm. Due to the excitation of the acceptor dye by the green (532 nm) and yellow-green (561 nm) lasers, there will be significant spillover into the PE and BD Horizon PE-CF594 detectors off the green or yellow-green lasers. BD Horizon BV605 conjugates are very bright, often exhibiting brightness equivalent to PE conjugates and can be used as a third color off of the violet laser.