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IL-21
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
| Primary Accession | Q9HBE4 |
|---|---|
| Species | Human |
| Sequence | Gln30-Ser162 |
| Purity | > 97% as analyzed by SDS-PAGE > 97% as analyzed by HPLC |
| Endotoxin Level | < 1 EU/ µg of protein by LAL method |
| Biological Activity | Fully biologically active when compared to standard. The ED50 as determined by by a cell proliferation assay using human N1186 T cells is less than 20.0 ng/ml, corresponding to a specific activity of > 5.0 × 104 IU/mg. |
| Expression System | E. coli |
| Theoretical Molecular Weight | 15.4 kDa |
| Formulation | Lyophilized from a 0.2 µm filtered solution in PBS, pH 7.4. |
| 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 sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/ml. |
| Storage & Stability | Upon receiving, this product remains stable for up to 6 months at -70°C or -20°C. Upon reconstitution, the product should be stable for up to 1 week at 4°C or up to 3 months at -20°C. Avoid repeated freeze-thaw cycles. |
| Gene ID | 59067 |
|---|---|
| Other Names | Interleukin-21, IL-21, Za11, IL21 (HGNC:6005) |
| Target Background | IL-21 is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation. Its action generally enhances antigen-specific responses of immune cells. The biological effects of IL-21 include induction of differentiation of T-cells-stimulated B-cells into plasma cells and memory B-cells, stimulation (in conjuction) with IL-4 of IgG production, and induction of apoptotic effects in naïve B-cells and stimulated B-cells in the absence of T-cell signaling. Additionally, IL-21 promotes the anti-tumor activity of CD8+ T-cells and NK cells. IL-21 exerts its effect through binding to a specific type I cytokine receptor, IL-21R, which also contains the gamma chain (γc) found in other cytokine receptors including IL-2, IL-4, IL-7, IL-9 and IL-15. The IL-21/IL-21R interaction triggers a cascade of events which includes activation of the tyrosine kinases JAK1 and JAK3, followed by activation of the transcription factors STAT1 and STAT3. |
| Name | IL21 (HGNC:6005) |
|---|---|
| Function | Cytokine with immunoregulatory activity. May promote the transition between innate and adaptive immunity. Induces the production of IgG(1) and IgG(3) in B-cells (By similarity). Implicated in the generation and maintenance of T follicular helper (Tfh) cells and the formation of germinal-centers. Together with IL6, control the early generation of Tfh cells and are critical for an effective antibody response to acute viral infection (By similarity). May play a role in proliferation and maturation of natural killer (NK) cells in synergy with IL15. May regulate proliferation of mature B- and T-cells in response to activating stimuli. In synergy with IL15 and IL18 stimulates interferon gamma production in T-cells and NK cells (PubMed:11081504, PubMed:15178704). During T-cell mediated immune response may inhibit dendritic cells (DC) activation and maturation (By similarity). |
| Cellular Location | Secreted. |
| Tissue Location | Expressed in activated CD4-positive T-cells but not in CD8-positive T-cells, B-cells, or monocytes |
Research Areas
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$ 203.00
Cat# PVGS1054
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