ACROBiosystems社 プロダクトリスト：Recombinant Protein
- Biotinylated Human IL-21 Protein, Fc Tag, Avi Tag (Avitag)
|Characteristics||This protein carries a human IgG1 Fc tag at the C-terminus, followed by a Avi tag (Avitag). The protein has a calculated MW of 43.9 kDa. The protein migrates as 36 kDa and 48-50 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.|
|Endotoxin Level||Less than 1.0 EU per μg by the LAL method.|
|Purity||>90% as determined by SDS-PAGE.|
|Description||Interleukin-21 (IL-21) is a secreted protein which belongs to the IL-15 / IL-21 family. Interleukin-21 / IL-21 belongs to a family of cytokines that bind to a composite receptor consisting of a private receptor (IL21R) and the common cytokine receptor gamma chain (gamma(C)). Interleukin-21 / IL-21 impacts a number of cell types, including CD8+ memory T cells, NK cells and subsets of CD4 memory T cells. The IL-21R is widely distributed on lympho-haematopoietic cells. 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. 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 γ 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.|
|Reference||(1) Chtanova T, et al., 2004, J Immunol 173 (1): 68?78.
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(3) Wurster AL, et al., 2002, J Exp Med 196 (7): 969?77.
(4) Iannello A, et al., 2010, J Leukoc Biol 87 (5): 857?67.
(5) Williams L.D., et al., 2010, Journal of Virology 85 (5): 2316?2324.