IL-21 Protein (AA 30-162)

Catalog No. ABIN7504975

This Recombinant IL-21 protein is produced in Escherichia coli (E. coli).

Quick Overview for IL-21 Protein (AA 30-162) (ABIN7504975)

Target: IL-21 (IL21) (Interleukin 21 (IL21))

Protein Type: Recombinant

Origin: Human

Source: Escherichia coli (E. coli)

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

Product Details

Protein Characteristics: AA 30-162

Sequence: Gln30-Ser162

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

Application Details

Restrictions: For Research Use only

Handling

Format: Lyophilized

Buffer: Lyophilized from sterile PBS, pH 7.4., 5 % trehalose, 5 % mannitol, 0.01 % tween-80.
Normally 5 % - 8 % trehalose, mannitol and 0.01 % Tween80 are added as protectants before lyophilization.

Storage: 4 °C,-20 °C,-80 °C

Storage Comment: 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.

Expiry Date: 12 months

Target Details

Target: IL-21 (IL21) (Interleukin 21 (IL21))

Alternative Name: IL-21

Background:

Abbreviation: IL-21

Target Synonym: Interleukin-21,Za11,IL21,

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.

Molecular Weight:

Calculated MW: 17.8 kDa

Observed MW: 18 kDa

UniProt: Q9HBE4

Pathways: JAK-STAT Signaling, Regulation of Leukocyte Mediated Immunity, Positive Regulation of Immune Effector Process, Production of Molecular Mediator of Immune Response