The IA10 monoclonal antibody specifically binds to CD55, which is also known as complement decay-accelerating factor (DAF). CD55 is a glycophosphatidylinositol (GPI)-anchored, single chain membrane glycoprotein of approximately 70 kDa that belongs to the regulators of complement activation (RCA) gene family which includes CD21, CD35, and CD46. CD55 is widely expressed on hematopoietic cells including platelets and erythrocytes, as well as on many non-hematopoietic cells, such as, endothelial cells and epithelial cells. CD55 is involved in protecting cells from damage by autologous activated complement complexes. CD55 prevents the amplification steps of the complement cascade by interfering with the assembly of the C3-convertases, C4b2a and C3bBb, and the C5-convertases, C4b2a3b and C3bBb3b.
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.