The 1A29 monoclonal antibody specifically recognizes ICAM-1 which is also known as CD54. ICAM-1 is an 85 kDa type I transmembrane glycoprotein that is encoded by Icam1 (Intercellular adhesion molecule 1). It is expressed on vascular endothelium in lymphoid tissues, thymic stromal cells, peripheral blood monocytes, peritoneal macrophages and mast cells, dendritic cells, and weakly on peripheral lymphocytes and thymocytes. ICAM-1 is a ligand for LFA-1 (CD11a/CD18) and Mac-1 (CD11b/CD18). Its expression is upregulated on activated lymphocytes and endothelial cells. 1A29 mAb inhibits Phorbol 12-Myristate 13-Acetate (PMA)-induced aggregation of phytohemagglutinin (PHA)-stimulated splenic blasts, as well as the adhesion of mitogen-stimulated blasts to high endothelial venule (HEV) cells and purified ICAM-1. The 1A29 antibody can reportedly inhibit leucocyte infiltration in in vivo systems, blocks induction of experimental allergic encephalomyelitis, and reduces NK-cell adhesion to tumor cells.
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.