A portion of amino acids 337-364 from the human protein was used as the immunogen for this CD33 antibody.
CD33 or Siglec-3 is a transmembrane receptor expressed on cells of myeloid lineage. It is usually considered myeloid-specific, but it can also be found on some lymphoid cells. It binds sialic acids, therefore is a member of the SIGLEC family of lectins. [Wiki]
