Background：B7-1 and B7-2, together with their receptors CD28 and CTLA4, constitute one of the dominant co-stimulatory pathways that regulate T and Bcell responses.
Although both CTLA4 and CD28 can bind to the same ligands, CTLA4 binds to B71 and B72 with a 20 100 fold higher affinity than CD28 and is involved in the downregulation of the immune response.
B-lymphocyte activation antigen B7-1 (referred to as B7) also known as cluster of Differentiation 80 (CD80), is a member of cell surface immunoglobulin superfamily and is expressed on activated B cells, activated T cells, macrophages and dendritic cells.
It is the ligand for two different proteins on the T cell surface: CD28 (for autoregulation and intercellular association) and CTLA-4 (for attenuation of regulation and cellular disassociation).
CD80 works in tandem with CD86 to prime T cells.
CD80 plays a role in induction of innate immune responses by activating NF-κB-signaling pathway in macrophages.
CD80 is thus regarded as promising therapeutic targets for autoimmune diseases and various carcinomas.
仕様
サイズ：100ug
Source：Cynomolgus / Rhesus macaque B7-1, Fc Tag (CD0-C5252) is expressed from human 293 cells (HEK293). It contains AA Val 35 - Asn 242 (Accession # G7NXN7). In the region Val 35 - Asn 242, the AA sequence of Cynomolgus and Rhesus macaque B7-1 are homologus.
Characteristics：This protein carries a human IgG1 Fc tag at the C-terminus. The protein has a calculated MW of 50.5 kDa. The protein migrates as 60-90 kDa under reducing (R) condition (SDS-PAGE) due to different glycosylation.
Endotoxin Level：Less than 1.0 EU per ug by the LAL method.
Purity：>95% as determined by SDS-PAGE.
Buffer：Tris with Glycine, Arginine and NaCl, pH7.5
