The A8 monoclonal antibody specifically binds to CD100 which is also known as Semaphorin-4D (SEMA4D). CD100 is a 150 kDa type I transmembrane glycoprotein that belongs to the semaphorin family. CD100 is widely expressed in the nervous and immune systems. Although it is expressed on T cells, its expression is significantly upregulated on activated T cells. It is also expressed on NK cells, B cells, and monocytes. CD100 is an adhesion molecule that functions as a signaling molecule which plays a role in lymphocyte activation. CD100 interaction with CD72 enhances B cell signaling and ultimately promotes B cell activation and survival.
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.