| 货号 | 规格 | 价格 |
|---|---|---|
| FL132 | ||
| 2μg | ¥198.00 | |
| 10μg | ¥998.00 | |
| 50μg | ¥2780.00 | |
| 100μg | ¥4980.00 | |
| 1mg | ¥23800.00 |
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| Appearance | Sterile filtered White lyophilized (freeze-dried) powder. |
|---|---|
| Purity | > 97% by SDS-PAGE or HPLC. |
| Endotoxin | < 0.01 EU/μg of rHuIL-21 protein as determined by LAL method. |
| Expression System | Expressed in E. coli. |
| Species | Human |
| Tag | Tag free. |
| Activity | Fully biologically active when compared to standard. Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED50 for this effect is ≤ 2 ng/ml. The specific activity of recombinant human IL-21 ≥ 5.0×10^5 U/mg. |
| Formulation | Lyophilized from a 0.2 μm filtered concentrated solution in 20 mM PB, with 150 mM NaCl, pH 7.4. |
| Reconstitution | Before use this product, please read the direction below carefully. This vial must be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in a sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0 mg/ml. Stock solutions should be apportioned into working aliquots and stored at ≤ -20℃. Further dilutions should be made in appropriate buffered solutions. |
| Accession # | Q9HBE4 Gln30-Ser162 |
|---|---|
| Amino acid sequence | QGQDRHMIRMRQLIDIVDQLKNYVNDLVPEFLPAPEDVETNCEWSAFSCFQKAQLKSANTGNNERIINVSIKKLKRKPPSTNAGRRQKHRLTCPSCDSYEKKPPKEFLERFKSLLQKMIHQHLSSRTHGSEDS |
| Molecular weight | Approximately 15.4 kDa, a single non-glycosylated polypeptide chain containing 133 amino acid. |
| Synonyms | Interleukin-21, Za11 |
| Stability & Storage | Shipped on wet ice. For long term storage, the product should be stored ≤ -20℃. Please avoid repeated freeze-thaw cycles after reconstitution. 36 months from date of receipt, -20 to -70℃ as supplied. 1 month, 2 to 8℃ under sterile conditions after reconstitution. 3 months, -20 to -70℃ under sterile conditions after reconstitution. |
| Precautions | Recombinant Human IL-21 is for research use only and not for use in diagnostic or therapeutic procedures. |
| Human IL-21 is encoded by IL-21 gene located on Chr.4. It is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation and can regulating immune system cells, for instance cytotoxin T cells and natural killer cells. Additionally, it can induce target cells division or proliferation. IL-21 elicits its effect through binding to IL-21R, which also contains the gamma chain found in other cytokine receptors such as IL-2, IL-4, IL-7, IL-9 and IL-15. IL-21 shows having much relation with clinical illnesses, including cancer immunotherapy, viral infections and allergies. Mature human IL-21 protein shares 63% and 61% aa sequence identity with mouse and rat IL-21 protein, respectively. Recombinant IL-21 is a single non-glycosylated polypeptide chain containing 133 amino acids |
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