The 13B 1E5 monoclonal antibody specifically binds to C-X-C chemokine receptor type 6 (CXCR6), which is also known as CD186, BONZO, T-lymphocyte-expressed seven-transmembrane domain receptor (TYMSTR), and Seven transmembrane receptor-like from clone 33 (STRL33). CXCR6 is a G-protein coupled chemokine receptor that is expressed on subsets of activated and memory T cells and NKT cells. CXCR6 binds to soluble CXCL16 and membrane-anchored CXCL16 expressed by dendritic cells and macrophages. The CXCL16 and CXCR6 interaction activates Akt and mTor signaling. This regulates cellular migration including the recruitment of tumor-infiltrating lymphocytes and may contribute to the progression and metastasis of various cancers. CXCR6 also can serve as a coreceptor for certain strains of HIV-1 and HIV-2.
The antibody was conjugated to BD Horizon Red 718, which has been developed exclusively for BD Biosciences as a better alternative to Alexa Fluor® 700. BD Horizon Red 718 can be excited by the red laser (628 – 640 nm) and, with an Em Max around 718 nm, it can be detected using a 730/45 nm filter. Due to similar excitation and emission properties, we do not recommend using R718 in combination with APC-R700 or Alexa Fluor® 700.