IL-21 Protein (Transcript Variant 1)

Catalog No. ABIN2723673

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

Quick Overview for IL-21 Protein (Transcript Variant 1) (ABIN2723673)

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

Protein Type: Recombinant

Biological Activity: Active

Origin: Human

Source: Escherichia coli (E. coli)

Application: Functional Studies (Func), Antibody Production (AbP), Standard (STD), Protein Interaction (PI)

Purity: > 95 % as determined by SDS-PAGE and Coomassie blue staining

Product Details

Protein Characteristics: Transcript Variant 1

Specificity: Optimal preservation of protein structure, post-translational modifications and functions.

Characteristics:

• Recombinant human Interleukin-21 / IL21 (transcript variant 1) protein expressed in E. coli.
• Produced with end-sequenced ORF clone
• Tested for bioactivity.

Endotoxin Level: Endotoxin level is <0.1 ng/μg of protein (<1EU/μg).

Biological Activity Comment: Assay #1:Determined by its ability to proliferate activated B cells. Assay #2:Determined by its ability to induce human CD40L-activated naïve B cells to undergo Ig isotype switching to IgG, using an IL-21 concentration of 50 ng/ml. Maximal activity was achieved after approximately five cell divisions. Avery, D.T. et. al. (2008) J. Immunol. 181, 1767-1779.

Application Details

Application Notes: Recombinant human proteins can be used for:
Native antigens for optimized antibody production
Positive controls in ELISA and other antibody assays
Protein-protein interaction
In vitro biochemical assays and cell-based functional assays

Restrictions: For Research Use only

Handling

Buffer: Lyophilized from a 0.2 μM filtered solution of 20 mM phosphate buffer,100 mM NaCl, pH 7.2

Handling Advice: Resuspend the protein in the desired concentration in proper buffer

Storage: -80 °C

Storage Comment: Store at -80°C. Thaw on ice, aliquot to individual single-use tubes, and then re-freeze immediately. Only 2-3 freeze thaw cycles are recommended.

Target Details

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

Alternative Name: Interleukin-21,il21

Background: This gene encodes a member of the common-gamma chain family of cytokines with immunoregulatory activity. The encoded protein plays a role in both the innate and adaptive immune responses by inducing the differentiation, proliferation and activity of multiple target cells including macrophages, natural killer cells, B cells and cytotoxic T cells. Dysregulation of this gene plays a role in multiple immune-mediated diseases including lupus, psoriasis and chronic inflammatory diseases. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene.

Molecular Weight: 15.4 kDa

NCBI Accession: NP_068575

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