The ACK2 monoclonal antibody specifically binds to CD117, which is also known as Proto-oncogene c-Kit (c-kit), Stem Cell Factor Receptor (SCFR), and Mast/stem cell growth factor receptor. This ~145 kDa type I transmembrane glycoprotein is encoded by Kit (KIT proto-oncogene receptor tyrosine kinase) which belongs to the receptor tyrosine kinase family (RTK) within the immunoglobulin superfamily (IgSF). CD117 (c-kit) serves as a receptor for c-Kit ligand (aka, stem cell factor or SCF). This receptor is expressed on multipotent hematopoietic stem cells and progenitors committed to myeloid and/or erythroid lineages, and precursors of B and T lymphocytes. CD117 (c-kit)-mediated signaling plays an important role in the activation, growth, proliferation, differentiation, and survival of cells in sustaining hematopoiesis. It is also involved in the development of mast cells and melanocytes. The specificity and functional activity of the ACK2 antibody is like that of another CD117 (c-kit)-specific antibody, ACK45. ACK2 is reported to block CD117 (c-kit) signaling in vitro and in vivo.
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.