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.
This page contains content from the copyrighted Wikipedia article "CD33"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.