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RecombinantIL-21,Human
Catalog Number: orb1494825
| Catalog Number | orb1494825 |
|---|---|
| Category | Proteins |
| Description | Interleukin-21 (IL-21) belongs to the Type I four helix bundle cytokines, and shares the common cytokine receptor γ chain with IL-2, IL-4, IL-7, IL-9, and IL-15. IL-21 is expressed by CD4+ T cells, natural killer (NK) T cells, and Th17 cells, and the IL-21 receptor is highly expressed on CD4+ and CD8+ B cells; indeed, IL-21 plays a pivotal role in the survival and proliferation of B cells, and their differentiation to immunoglobulin (Ig) producing cells. IL-21 up-regulates and down-regulates the production of IgG1 and IgE by B cells, respectively, and diminishes the severity of allergy and asthma. In some case, IL-21 also induces the apoptosis of B cells. The other roles of IL-21 include regulation of innate immune systems, implication on autoimmunity, and antitumor actions.Recombinant human Interleukin-21 (rhIL-21) produced in E.coli is a single non-glycosylated polypeptide chain containing 132 amino acids. A fully biologically active molecule, rhIL-21 has a molecular mass of 15.4 kDa analyzed by reducing SDS-PAGE and is obtained by proprietary chromatographic techniques at GenScript. |
| Form/Appearance | Lyophilized after extensive dialysis against PBS. |
| Purity | > 95% by SDS-PAGE analysis. |
| MW | 15.4 kDa, observed by reducing SDS-PAGE. |
| Protein Sequence | MQDRHMIRM RQLIDIVDQL KNYVNDLVPE FLPAPEDVET NCEWSAFSCF QKAQLKSANT GNNERIINVS IKKLKRKPPS TNAGRRQKHR LTCPSCDSYE KKPPKEFLER FKSLLQKMIH QHLSSRTHGS EDS |
| Source | Escherichia coli. |
| Biological Activity | ED50 2.0× 10ˆ6 units/mg. |
| Endotoxins | < 0.2 EU/μg, determined by LAL method. |
| Storage | Lyophilized recombinant human Interleukin-21 (rhIL-21) remains stable up to 6 months at -80°C from date of receipt. Upon reconstitution, rhIL-21 should be stable up to 2 weeks at 4°C or up to 3 months at -20°C. |
| Buffer/Preservatives | Lyophilized after extensive dialysis against PBS. |
| Alternative names | Interleukin-21, IL21 Read more... |
| Note | For research use only |
| Application notes | Reconstituted in ddH2O at 100 μg/mL. |
| Expiration Date | 6 months from date of receipt. |
