The L17F12 monoclonal antibody specifically binds to CD5 which is also known as Lymphocyte antigen T1 (T1) or LEU1/Leu-1. CD5 is an ~67 kDa single-chain, type 1 transmembrane glycoprotein expressed on most thymocytes, the majority of peripheral T lymphocytes and a subpopulation of B cells. CD5+ B cells produce polyreactive antibodies (mostly IgM). This CD5-specific antibody also reacts with many T-cell leukemias and lymphomas and most Ig+ B-cell chronic lymphoblastic leukemia (B-CLL) cells. CD72 has been shown to be the natural ligand for CD5.
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.