The CD5 antigen is present on approximately 70% of normal peripheral blood lymphocytes and >90% of all T-lymphocytes. T-lymphocytes in the thymus stain weakly while peripheral T-cells stain strongly. Monocytes, granulocytes and NK cells are not stained (1). Anti-CD5 also reacts with a distinct subset normal B-lymphocytes, occasional cells in B-lymphocyte areas of spleen and lymph node, and most Ig+ B-chronic lymphoblastic leukemia (CLL) cells. The CD5 antigen has also been shown to be present on some lymphomas.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.