Recombinant Human IL-21 Protein | PKSH500028

Recombinant Human IL-21 Protein | PKSH500028 | Gentaur US, UK & Europe Disrtribition

Synonyms: Interleukin-21，Za11，IL21,

Active Protein: N/A

Activity: A DNA sequence encoding the Human IL-21 protein (Q9HBE4) (Gln30-Ser162) was expressed with a polyhistidine tag at the N-terminus.

Protein Construction: A DNA sequence encoding the Human IL-21 protein (Q9HBE4) (Gln30-Ser162) was expressed with a polyhistidine tag at the N-terminus.

Fusion Tag: N-His

Species: Human

Expressed Host: E.coli

Shipping: This product is provided as lyophilized powder which is shipped with ice packs.

Purity: > 90 % as determined by reducing SDS-PAGE.

Endotoxin: Please contact us for more information.

Stability and Storage: Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.

Molecular Mass: 17.8 kDa

Formulation: Lyophilized from sterile PBS, pH 7.4, 5% trehalose, 5% mannitol, 0.01% tween-80.

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.

Research Area: Cancer, Cardiovascular, Immunology, Cytokines