Description
Product Characteristics: The antigen is a single chain transmembrane glycoprotein of molecular mass 67 kDa expressed on monocytes, myeloid progenitor cells and myeloid leukaemias. The antigen has homology with CD22 and myelin associated glycoprotein. CD33 appears very early on myelomonocytic precursors and is expressed in both the myeloid and monocytic cell lineages. CD33 is absent from pluripotent stem cells but appears on myelomonocytic precursors after CD34. It then continues to be expressed on both the myeloid and monocyte lineages
Target Information: Putative adhesion molecule of myelomonocytic-derived cells that mediates sialic-acid dependent binding to cells. Preferentially binds to alpha-2,6-linked sialic acid. The sialic acid recognition site may be masked by cis interactions with sialic acids on the same cell surface. In the immune response, may act as an inhibitory receptor upon ligand induced tyrosine phosphorylation by recruiting cytoplasmic phosphatase(s) via their SH2 domain(s) that block signal transduction through dephosphorylation of signaling molecules. Induces apoptosis in acute myeloid leukemia (in vitro)