Human IL-21 Recombinant Protein (His Tag) (active) (RPES6416)

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SKU:
RPES6416
Product Type:
Recombinant Protein
Species:
Human
Application Area:
Cytokines & Chemokines
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Description

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Product Name:Human IL-21 Recombinant Protein (His Tag) (active)
Product Code:RPES6416
Size:20µg
Species:Human
Expression Host:E.coli
Synonyms:Za11
Mol Mass:15.4 kDa
Tag:C-His
Purity:> 95 % as determined by reducing SDS-PAGE.
Endotoxin Level:< 0.1 EU per μg of the protein as determined by the LAL method.
Bio Activity:Measure by its ability to enhance IFN gamma secretion in NK-92 cells. The ED50 for this effect is < 10 ng/mL.
Sequence:MQDRHMIRMRQLIDIVDQLKNYVNDLVPEFLPAPEDVETNCEWSAFSCFQKAQLKSANTGNNERIINVSIKKLKRKPPSTNAGRRQKHRLTCPSCDSYEKKPPKEFLERFKSLLQKMIHQHLSSRTHGSEDS
Accession:Q9HBE4
Storage:Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8°C for 2-7 days. Aliquots of reconstituted samples are stable at < -20°C for 3 months.
Shipping:This product is provided as lyophilized powder which is shipped with ice packs.
Formulation:Lyophilized from sterile PBS, pH 8.0 Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the printed manual.
Reconstitution:Please refer to the printed manual for detailed information.
Background:IL-21 is a potent cytokine regulating many cell types of the immune system. IL-21 is produced by activated T follicular helper cells (Tfh), Th17 cells, and NKT cells. Tfh-derived IL-21 plays an important role in the development of humoral immunity through its autocrine effects on the Tfh cell and paracrine effects on immunoglobulin affinity maturation, plasma cell differentiation, and B cell memory responses. IL-21 protein regulates several aspects of T cell function. It co-stimulates the activation, proliferation, and survival of CD8+ T cells and NKT cells and promotes Th17 cell polarization. IL-21 blocks the generation of regulatory T cells and their suppressive effects on CD4+ T cells. In addition to its role in T cell biology, IL-21 also plays a critical role in B cell activation, proliferation, differentiation, and apoptosis. It is also required for the migration of dendritic cells to draining lymph nodes. And IL-21 suppresses cutaneous hypersensitivity reactions by limiting allergen-specific IgE production and mast cell degranulation. In the autoimmune disease Systemic lupus erythematosus (SLE), a link between IL-21 and SLE disease susceptibility and progression was recently reported.
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