The B1 monoclonal antibody specifically binds to the γδ T cell receptor (γδ TCR). This receptor complex consists of two disulfide-linked transmembrane glycoproteins, a γ chain (45-60 kDa) and a δ subunit (40-60 kDa). The γδ TCR is associated with the signal-transducing CD3 complex. The γδ TCR is expressed by thymocytes and by peripheral T cell subsets (γδ T cells) that are located in the blood, liver, skin and various lymphoid and mucosal tissues. γδ T cells contribute to both innate and adaptive immune responses to infections and tumors. Reports suggest that γδ T cells may also play roles in antigen presentation and the regulation of autoimmune responses.
The antibody was conjugated to BD Horizon™ BV786 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 786-nm. BD Horizon BV786 can be excited by the violet laser and detected in a filter used to detect Cy™7-like dyes (eg, 780/60-nm filter).