Recombinant Cynomolgus/Rhesus Macaque B7-1/CD80 Protein, CF Summary
|Cynomolgus Monkey B7-1/CD80 |
Accession # XP_005548122
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.|
|Reconstitution||Reconstitute at 250 μg/mL in water.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||
2 μg/lane of Recombinant Cynomolgus Monkey B7‑1/CD80 was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 53-79 kDa and 105-160 kDa, respectively.
B7-1/CD80 and B7-2/CD86, together with their receptors CD28 and CTLA-4, constitute one of the dominant co-stimulatory pathways that regulate T- and B-cell responses (1). Although both CTLA-4 and CD28 can bind to the same ligands, CTLA-4 binds to B7-1 and B7-2 with a 20-100-fold higher affinity than CD28 and is involved in the down-regulation of the immune response (2-5). B7-1 is expressed on activated B cells, activated T cells, and macrophages. B7-2 is constitutively expressed on interdigitating dendritic cells, Langerhans cells, peripheral blood dendritic cells, memory B cells, and germinal center B cells (2). Mature cynomolgus monkey B7-1 consists of a 213 amino acid (aa) extracellular domain (ECD) with two immunoglobulin-like domains, a 22 aa transmembrane domain, and a 20 aa cytoplasmic domain. Within the ECD, cynomolgus monkey B7-1 shares 97% and 51% aa sequence identity with human and mouse B7-1, respectively. The B7/CD28/CTLA4 pathway has the ability to both positively and negatively regulate immune responses. CD80 is thus regarded as promising therapeutic targets for autoimmune diseases and various carcinomas (6).
- Ville, S. et al. (2015) Front. Immunol. 6:411.
- Azuma, M. et al. (1993) Nature 366:76.
- Freeman, G.J. et al. (1993) Science 262:909.
- Chen, C. et al. (1994) J. Immunol. 152:4929.
- Freeman, G.J. et al. (1993) J. Exp. Med. 178:2185.
- Mir, M.A., et al. (2008) Expert Opin. Ther. Targets 12:969.
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