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Interleukin 21, Recombinant, Human (IL-21)
Interleukin 21, Recombinant, Human (IL-21)
Pricing
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| Catalog # | I8442-15 | | Source | Recombinant corresponding to human Interleukin 21 expressed in E. coli. | | Molecular Weight | ~15kD | | Endotoxin | ~0.1ng/ug | | Biological Activity | ED50 range=1.0-10ng/ml, determined by the dose-dependent proliferation of human peripheral blood mononuclear cells. The optimal concentration for each specific application should be determined by an initial dose-response assay. | | Storage and Stability | Lyophilized powder may be stored at 4°C for short-term only. Reconstitute to nominal volume by adding sterile ddH2O, aliquot and store at -20°C. Reconstituted product is stable for 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer. | | Molecular Weight | ~15kD | | Source | E. coli | | Purity | ~95% (SDS-PAGE) | | Concentration | Not determined | | Form | Supplied as a lyophilized powder. BSA free. Reconstitute with sterile ddH2O to 0.01-1mg/ml. This solution can then be diluted with low encotoxin medium or a buffer with such as heat inactivated FCS or tissue culture grade BSA. | | | Important Note | This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological. |
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