The AH9R7 monoclonal antibody specifically binds to the Interleukin-9 Receptor (IL-9R, IL-9Rα) also known as CD129. CD129 is a Type I transmembrane glycoprotein and a Type I Cytokine Receptor (Hemopoietin) Superfamily member. The high-affinity, signaling IL-9 Receptor complex is comprised of CD129 (IL-9 Receptor alpha chain subunit) and CD132 (common γ chain/γc). CD129 is expressed by hematopoietic progenitors, thymocytes, T cells, B cells, macrophages, eosinophils, mast cells, epithelia cells, muscle cells and neurons. IL-9 signals through the IL-9R complex (ie, through JAK, STAT and related signal pathways) to regulate the growth, proliferation, differentiation and survival of myeloid and erythroid progenitor cells, thymocytes, T cells, B cells and some tumor cells.
The antibody was conjugated to BD Horizon BUV615 which is part of the BD Horizon Brilliant™ Ultraviolet family of dyes. This dye is a tandem fluorochrome with an Ex Max near 350 nm and an Em Max near 615 nm. BD Horizon Brilliant BUV615 can be excited by the ultraviolet laser (355 nm) and detected with a 610/20 filter and a 595 nm LP. Due to the excitation of the acceptor dye by the blue/yellow-green laser line, there may be significant spillover into channels detecting PE-CF594 like emissions (eg, 610/20-nm filter).