Recombinant Cynomolgus Monkey B7-1/CD80 His-tag Protein, CF Summary
Details of Functionality |
Measured by its binding ability in a functional ELISA. When Recombinant Cynomolgus Monkey B7-1/CD80
is immobilized at 0.5 µg/mL
(100 µL/well), the concentration of Recombinant Human CTLA-4 Fc Chimera
(Catalog # 7268-CT)
that produces 50% of the optimal binding response is approximately 5-30 ng/mL. |
Source |
Human embryonic kidney cell, HEK293-derived cynomolgus monkey B7-1/CD80 protein Val35-Asn242, with a C-terminal 6-His tag |
Accession # |
|
N-terminal Sequence |
Val35 |
Protein/Peptide Type |
Recombinant Proteins |
Purity |
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. |
Endotoxin Note |
<0.10 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
25 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
SDS-PAGE |
35-45 kDa, reducing conditions |
Packaging, Storage & Formulations
Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
Purity |
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining. |
Reconstitution Instructions |
Reconstitute at 1 mg/mL in PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Cynomolgus Monkey B7-1/CD80 His-tag Protein, CF
Background
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 (2-6). Mature cynomolgus B7-1 consists of a 208 aa extracellular domain (ECD) with two immunoglobulin-like domains, a 21 aa transmembrane domain, and a 25 aa cytoplasmic domain (7). Within the ECD, cynomolgus B7-1 shares 97%, 51%, and 54% aa sequence identity with human, mouse, and rat B7-1, respectively. Both human and mouse B7-1 and B7-2 can bind to either human or mouse CD28 and CTLA-4 (1). 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).
- 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.
- Lanier, L. et al. (1995) J. Immunol. 154:97.
- Freeman, G.J. et al. (1989) J. Immunol. 143:2714.
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