| 货号 | FAB434G-100UG |
| 别名 | CD; CD152 antigen; CD152; CD152IDDM12; CD28; celiac disease 3; CELIAC3; CTLA4; CTLA-4; cytotoxic T-lymphocyte antigen 4; cytotoxic T-lymphocyte protein 4; Cytotoxic T-lymphocyte-associated antigen 4; cytotoxic T-lymphocyte-associated protein 4; cytotoxic T-lymphocyte-associated serine esterase-4; GRD4; GSE; ICOS; ligand and transmembrane spliced cytotoxic T lymphocyte associated antigen 4 | 全称 | Cytotoxic T-lymphocyte-associated Molecule 4 |
| 应用 | Flow Cytometry |
| 目标/特异性 | Detects mouse CTLA-4 in direct ELISAs and Western blots. In direct ELISAs, this antibody does not cross-react with recombinant mouse (rm) CD28, recombinant human CTLA-4, rmICOS, or rmPD-1. |
| 使用方法 | Flow Cytometry: 0.25-1 µg/106cells |
| 来源 | The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below. |
| 产品组分 |
| 供应商 | R&D Systems |
| Entrez Gene IDs | 1493 (Human); 12477 (Mouse); 403696 (Canine); 102115124 (Cynomolgus Monkey) |
| 免疫原 | Mouse myeloma cell line NS0-derived recombinant mouse CTLA-4 Ala36-Phe161 Accession # XP_001479180 |
| 生物活性 | Mouse |
| 标记 | Alexa Fluor 488 |
| 背景 | CTLA-4 and CD28, together with their ligands B7-1 and B7-2, constitute one of the dominant costimulatory pathways that regulate T and B cell responses. CTLA-4 and CD28 are structurally homologous molecules that are members of the immunoglobulin (Ig) gene superfamily. Both CTLA-4 and CD28 are composed of a single Ig V‑like extracellular domain, a transmembrane domain and an intracellular domain. CTLA-4 and CD28 are both expressed on the cell surface as disulfide-linked homodimers or as monomers. The genes encoding these two molecules are closely linked on human chromosome 2. CTLA-4 was originally identified as a gene that was specifically expressed by cytotoxic T lymphocytes. However, CTLA-4 transcripts have since been found in both Th1 and Th2, and CD4+ and CD8+ T cell clones. Whereas, CD28 expression is constitutive on the surfaces of 95% of CD4+ T cells and 50% of CD8+ T cells and is down regulated upon T cell activation, CTLA-4 expression is upregulated rapidly following T cell activation and peaks approximately 24 hours following activation. Although both CTLA-4 and CD28 can bind to the same ligands, CTLA-4 binds to B7-1 and B7-2 with 20-100-fold higher affinity than CD28. The physiological role of CTLA-4 in T cell costimulation is currently being studied. Recombinant human or mouse CTLA-4/Fc chimera preparations produced at R&D Systems have been shown to bind both B7-1 and B7-2 with high affinity and to inhibit CD28 signalling competitively. |
| 运输条件 | Blue Ice |
| 存放说明 | 4℃ |
| 参考文献 |
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