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物种
Mouse分子别名
IL-21,rMuIL-21,Za11Accession
Q9ES17表达序列
Pro25-Ser146表达宿主
E.coli分子量
14kDa
纯度
>95% by SDS-PAGE内毒素含量
<1EU/μg活性
<20ng/mL标记
Unconjugated标签
No Tag性状
Lyophilized Powder缓冲体系
20mM Tris, 100mM NaCl, pH8.0
溶解方法
Reconstitute at 0.1-1 mg/ml according to the size in ultrapure water after rapid centrifugation.
储存条件
· 12 months from date of receipt, lyophilized powder stored at -20 to -80℃.
· 3 months, -20 to -80℃ under sterile conditions after reconstitution.
· 1 week, 2 to 8℃ under sterile conditions after reconstitution.
· Please avoid repeated freeze-thaw cycles.
文献引用
1、Coquet J M. et al. (2007) IL-21 is produced by NKT cells and modulates NKT cell activation and cytokine production. J Immunol. 178(5):2827-34.
2、Wei L. et al. (2007) IL-21 is produced by Th17 cells and drives IL-17 production in a STAT3-dependent manner. J Biol Chem. 282(48):34605-10.
3、Parrish-Novak J. et al. (2002) Interleukin-21 and the IL-21 receptor: novel effectors of NK and T cell responses. J Leukoc Biol. 72(5):856-63.
4、Kuchen S. et al. (2007) Essential role of IL-21 in B cell activation, expansion, and plasma cell generation during CD4+ T cell-B cell collaboration. J Immunol. 179(9): 5886-96.
IL-21 belongs to the IL-15/IL-21 family. It is a cytokine with immunoregulatory activity. IL-21 is a T-cell–derived cytokine that works in concert with other γc cytokines. It synergizes with IL-7 and IL-15 to expand and activate CD8 T cells. IL-21 also augments the activity of NK cells. IL-21, along with IL-6, drives differentiation of Tfh. Tfh cells are found preferentially in B-cell follicles, where, under the control of the transcription factor BCL6, they regulate B-cell development, activation, and class switching. Tfh cells are also a source of IL-21. IL-21 appears to have some anticancer properties, and it has been tested in the treatment of melanoma.
生物活性
Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED50 for this effect is less than 60ng/mL.
电泳
- 1μg (R: reducing condition, N: non-reducing condition).
ELISA
Immobilized IL-21 Protein, Mouse (Cat. No. UA040080) at 2.0μg/mL (100μL/well) can bind IL-21R Fc Chimera Protein, Human with EC50 of 3.14-3.78 ng/mL.
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