The rat CD200 cell surface antigen, also known as OX-2, is a type I membrane glycoprotein, expressed on rat thymocytes, neurons, follicular dendritic cells, endothelium and at low levels on some B cells and smooth muscle cells. Studies have indicated that the CD200-CD200 ligand system is important in the control of macrophage and granulocyte activation and that this antibody blocks OX-2 mediated T cell costimulation. Applications: Suitable for use in Immunofluorescence, Flow Cytometry, Immunohistochemistry (frozen), and Immunoprecipitation. Other applications not tested. Recommended Dilution: Flow Cytometry: 1:50-1:100, 10ul labels 10e6 cells in 100ul Optimal dilutions to be determined by the researcher. Hybridoma: NS1 myeloma cells with spleen cells from Balb/c mice. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.