CD80 (T-lymphocyte Activation Antigen CD80, Activation B7-1 Antigen, BB1, CTLA-4 Counter-receptor B7.1, B7, CD28LG, CD28LG1, LAB7) (PE/CY5)

CD80 (B7-1) is a type I transmembrane glycoprotein and a member of the immunoglobulin superfamily of cell surface receptors. It is constitutively expressed by dendritic cells, monocytes, and peritoneal macrophages. Expression of CD80 on B cells is upregulated after activation by various means including stimulation by LPS, IL-4, and surface Ig receptor cross linking with peak expression occurring between 48 and 72 hours postactivation. 1-4 The interaction of CD80/B7-1 with its ligands, CD28 and CD152/CTLA-4, provides a potent costimulatory signal for T cells activated through the CD3/T cell receptor complex.5, 6 This antibody locks binding of CTLA-4 to CD80, but it does not block stimulation of T cells by natural antigen presenting cells. 2, 7||Applications:|• Flow cytometry 2, 7|• Immunoprecipitation 7|• In vivo and in vitro blocking of ligand binding 7||Recommended Dilution:|Flow Cytometry: ≤ 0.2ug/10e6 cells|Optimal dilutions to be determined by the researcher.||Storage and Stability:|May be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot and add glycerol (40-50%). Store at -20°C or colder. Aliquots are stable for at least 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.||PE/CY5 combination conjugate is used as a third fluorochrome in multicolor flow cytometry applications when only a single 488nm excitation source is available. Antibodies are covalently coupled using heterobifunctional linking reagents, resulting in an optimal conjugation format for flow cytometry.