Sino Biological offers a comprehensive set of tools for Fc receptor–related studies, including recombinant proteins, antibodies [rabbit monoclonal antibodies (mAbs), mouse mAbs, and rabbit polyclonal antibodies (pAbs)]; ELISA kits; and Open Reading Frame (ORF) complementary DNA clones. Fc receptors are proteins belonging to the immunoglobulin superfamily that contribute to the protective functions of the immune system, and are found on the surface of certain cells—including B lymphocytes, natural killer cells, macrophages, neutrophils, and mast cells. Their name is derived from their binding specificity for a part of an antibody known as the fragment crystallizable (Fc) portion. Fc receptors bind to antibodies that are attached to infected cells or invading pathogens. There are many kinds of Fc receptors, which are named based on the type of antibody that they recognize. Their activity stimulates phagocytic or cytotoxic cells to destroy microbes or infected cells by antibody-mediated phagocytosis or antibody-dependent cell-mediated cytotoxicity. Over 9,000 quality antibody products for scientists are in stock.