Mouse Monoclonal, RTU. Intended for in vitro diagnostic (IVD) use. This antibody is specific to a membrane glycoprotein of 45 kDa, designated as CD23. CD23 is found on a subpopulation of peripheral blood cells, B lymphocytes and on EBV transformed B lymphoblastoid cell lines. Expression of CD23 has been detected in neoplastic cells from cases of B cell chronic lymphocytic leukemias. References Kaiserlian et al. Immunology 80: 90, 1993.