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Recombinant Human IL-21 Protein

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SDS-Page: Human IL-21 Protein [NBP2-35057]

Product Details

Summary
Reactivity HuSpecies Glossary
Applications PAGE, Bioactivity
Format
Carrier-Free
Concentration
LYOPH

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Recombinant Human IL-21 Protein Summary

Description
A single non-glycosylated polypeptide chain containing 133 amino acids corresponding to IL-21 Source: E. coli

Uniprot ID: Q9HBE4

Amino Acid Sequence: QGQDRHMIRM RQLIDIVDQL KNYVNDLVPE FLPAPEDVET NCEWSAFSCF QKAQLKSANT GNNERIINVS IKKLKRKPPS TNAGRRQKHR LTCPSCDSYE KKPPKEFLER FKSLLQKMIH QHLSSRTHGS EDS

Details of Functionality
Fully biologically active when compared to standard. Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED50 for this effect is less than or equal to 2 ng/mL. The specific activity of recombinant human IL-21 > 5.0 x 10^5 U/mg.
Source
E. coli
Protein/Peptide Type
Recombinant Protein
Gene
IL21
Purity
> 97 % pure by SDS-PAGE and HPLC
Endotoxin Note
Less than 1 EU/ug of IL-21 as determined by LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
  • SDS-Page
Theoretical MW
15.4 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

Storage
Store at -20 to -70C as supplied. After reconstitution, store at 2 to 8C for 1 month and at -20 to -70C for long term storage. Avoid repeated freeze-thaw cycles.
Buffer
Lyophilized from a 0.2 um filtered concentrated solution in PBS, pH 7.4.
Preservative
No Preservative
Concentration
LYOPH
Purity
> 97 % pure by SDS-PAGE and HPLC
Reconstitution Instructions
Recommended to centrifuge prior to opening. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1.0mg/mL. Apportion stock solutions into working aliquots and store at <-20C.

Notes

This lyophilized preparation is stable at 2-8 degrees C, but should be kept at -20 degrees C for long term storage, preferably desiccated. Upon reconstitution, the preparation is most stable at -20 to -80 degrees C, and can be stored for one week at 2-8 degrees C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20 degrees C to -80 degrees C. Avoid repeated freeze/thaw cycles.

Alternate Names for Recombinant Human IL-21 Protein

  • CVID11
  • IL21
  • IL-21
  • IL-21Za11interleukin-21
  • interleukin 21
  • interleukin-21 isoform
  • Za11

Background

Human IL-21 is encoded by IL-21 gene located on Chr. 4. It is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation and can regulating immune system cells, for instance cytotoxin T cells and natural killer cells. Additionally, it can induce target cells division or proliferation. IL-21 elicits its effect through binding to IL-21R, which also contains the gamma chain found in other cytokine receptors such as IL-2, IL-4, IL-7, IL-9 and IL-15. 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. IL-21 shows having much relation with clinical illnesses, including cancer immunotherapy, viral infections and allergies

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Peptides and proteins are guaranteed for 3 months from date of receipt.

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Bioinformatics

Gene Symbol IL21
Uniprot