Mouse Monoclonal, RTU. Intended for in vitro diagnostic (IVD) use. This antibody is specific to a sialoglycoprotein of 27-32 kDa known as CD99 or MIC2 gene product. CD99 is expressed on the cell membrane of some lymphocytes, cortical thymocytes and granulosa cells of the ovary, Sertoli cells of testis, pancreatic islet cells, and some endothelial cells. Mature granulocytes express very little or no CD99. References Sandrin et al. Immunogenetics 35: 283, 1992.