For reference only. Please follow the manual included in your kit for instructions.
Catalog Number
RD30715F
Human peripheral blood lymphocytes are stained with FITC Anti-Human CD19 Antibody and APC Anti-Human CD22 Antibody (Left). Lymphocytes are stained with FITC Anti-Human CD19 Antibody and APC Mouse IgG1, κ Isotype Control (Right).
CD22 is a 130 kD type I transmembrane glycoprotein also known as Siglec-2 and BL-CAM. It is a member of the immunoglobulin superfamily (sialoadhesion subgroup). CD22 is expressed in the cytoplasm of pro-B and pre-B cells, and on the surface of mature B and activated B cells, but not on plasma cells. CD22 is present in the B cell receptor complex and associates with SHP-1, Syk, Lck, Lyn, and phospholipase Cγ1. A primary function of CD22 is thought to be in limiting antigen receptor signaling by modulating B cell activation threshold. CD22 has been shown to bind to CD45RO and CD75, although the natural ligands for this molecule remain controversial.