The GL2 monoclonal antibody specifically reacts with Vδ 4 T-cell Receptor (TCR)-bearing T cells, which are the predominant γδ TCR-bearing cells in the adult intestinal epithelium (γδ IEL). The frequency of Vδ 4 TCR-bearing γδ IEL differs among inbred strains of mice and may be influenced by haplotypes of the MHC, Tcrg, and/or Tcrd gene complexes. There is evidence that these γδ IEL develop in the absence of thymic influence. T lymphocytes expressing Vδ 4 TCR have also been found in lactating mammary glands, the spleen, and the thymus.
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.