CD8b Rat anti-Mouse, Brilliant Violet 650, Clone: H35-17.2, BD Optibuild
Rat Monoclonal Antibody
Manufacturer: BD Biosciences 740552
The H35-17.2 monoclonal antibody specifically binds to both alloantigeneic forms of the β chain of the CD8 differentiation antigen (Ly-3 or Lyt- 3). The CD8 α and α chains (CD8a) form heterodimers with the CD8 β chain (CD8b, Ly-3, or Lyt-3) on the surface of most thymocytes. A subpopulation of mature T lymphocytes (i.e., MHC class I-restricted T cells, including most T suppressor/cytotoxic cells) expresses almost exclusively the CD8 αβ heterodimer (the α chain is absent). Subsets of γδ TCR-bearing T cells, intestinal intraepithelial lymphocytes, and dendritic cells express CD8a without CD8b. It has been suggested that the expression of the CD8a/CD8b heterodimer is restricted to T lymphocytes which matured in the thymus or in an extrathymic environment that had been influenced by thymus- initiated neuroendocrine signals. CD8 is an antigen coreceptor on the T-cell surface which interacts with MHC class I molecules on antigen-presenting cells. It participates in T-cell activation through its association with the T-cell receptor complex and protein tyrosine kinase lck (p56lck). The H35-17.2 mAb blocks T-cell-mediated cytolysis of allogeneic lymphoma cells.
The antibody was conjugated to BD Horizon BV650 which is part of the BD Horizon Brilliant Violet family of dyes. This dye is a tandem fluorochrome of BD Horizon BV421 with an Ex Max of 405-nm and an acceptor dye with an Em Max at 650-nm. BD Horizon BV650 can be excited by the violet laser and detected in a filter used to detect APC-like dyes (eg, 660/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there will be spillover into the APC and Alexa Fluor 700 detectors. However, the spillover can be corrected through compensation as with any other dye combination.
|Brilliant Violet 650|
|Aqueous buffered solution containing ≤0.09% sodium azide.|
|Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.|
|Ly-3; Lyt-3; Lymphocyte antigen 3; Ly-C; CD8b1|
|The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography.|
For Research Use Only