CTLA-4
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Primary Accession | Q6GTR6 |
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Species | Mouse |
Sequence | Ala37-Phe162 |
Purity | > 90% as analyzed by SDS-PAGE |
Endotoxin Level | < 1 EU/ µg of protein by gel clotting method |
Biological Activity | Immobilized Mouse B7-1/CD80 Protein, His Tag at 2.0 µg/ml can bind CTLA-4, mFc, Mouse with EC50=12.57 ng/ml when detected by M6 Goat Anti Mouse FC. |
Expression System | CHO |
Formulation | Lyophilized from a 0.2 µm filtered solution in PBS. |
Reconstitution | It is recommended that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute the lyophilized powder in ddH₂O or PBS up to 100 µg/ml. |
Storage & Stability | Upon receiving, this product remains stable for up to 6 months at lower than -70°C. Upon reconstitution, the product should be stable for up to 1 week at 4°C or up to 3 months at -20°C. For long term storage it is recommended that a carrier protein (example 0.1% BSA) be added. Avoid repeated freeze-thaw cycles. |
Target Background | CTLA-4 (Cytotoxic T-Lymphocyte Antigen 4) is also known as CD152, is an Inhibitory receptor acting as a major negative regulator of T-cell responses. CTLA-4 is a member of the immunoglobulin superfamily, which is expressed on the surface of T cells and transmits an inhibitory signal to T cells. CTLA-4 and CD28 are homologous receptors expressed by both CD4+ and CD8+ T cells, which mediate opposing functions in T-cell activation. Both receptors share a pair of ligands expressed on the surface of antigen-presenting cells (APCs). The affinity of CTLA-4 for its natural B7 family ligands, CD80 and CD86, is considerably stronger than the affinity of their cognate stimulatory co-receptor CD28. |
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