NCIt definition : Hematopoietic progenitor cell antigen CD34 (385 aa, 41 kDa) is encoded by the human
CD34 gene. This protein plays a role in cell-cell adhesion and may have a role in
leukocyte migration.;
NCIt note : A protein found on the surface of some bone marrow and blood cells. Glycoproteins
found on immature hematopoietic cells and endothelial cells. They are the only molecules
to date whose expression within the blood system is restricted to a small number of
progenitor cells in the bone marrow.;