The VIM3b monoclonal antibody recognizes CD97. CD97 is a seven-span transmembrane protein that belongs to the G-protein coupled receptor superfamily. CD97 is encoded by ADGRE5 (adhesion G protein-coupled receptor E5). CD97 is highly expressed on monocytes and granulocytes. It is also expressed on dendritic cells, T cells, B cells, NK cells, and smooth muscle cells. CD97 expression is upregulated on activated T cells. CD97 is also expressed on several cell lines including HL-60, THP-1, and K562. CD97 reportedly plays roles in leucocyte signaling, adhesion, and migration. The VIM3b antibody works in Western blotting and immunoprecipitation. The antibody recognizes proteins of 74, 80 and 89 kDa. CD55 and chondroitin sulfate are ligands for CD97.
The antibody was conjugated to BD Horizon™ BV711 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 711-nm. BD Horizon BV711 can be excited by the violet laser and detected in a filter used to detect Cy™5.5 / Alexa Fluor® 700-like dyes (eg, 712/20-nm filter). Due to the excitation and emission characteristics of the acceptor dye, there may be moderate spillover into the Alexa Fluor® 700 and PerCP-Cy5.5 detectors. However, the spillover can be corrected through compensation as with any other dye combination.