Recombinant Mouse IL-21 Protein, CF Summary
| Details of Functionality |
Measured by its ability to enhance IFN-gamma secretion in NK-92 human natural killer lymphoma cells. The ED 50 for this effect is 3-30 ng/mL. |
| Source |
E. coli-derived mouse IL-21 protein Pro25-Ser146, with and without an N-terminal Met |
| Accession # |
|
| N-terminal Sequence |
Pro25 & Met |
| Protein/Peptide Type |
Recombinant Proteins |
| Gene |
Il21 |
| Purity |
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain |
| Endotoxin Note |
<0.10 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
| Dilutions |
|
| Theoretical MW |
14.4 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. |
| Publications |
Read Publications using 594-ML/CF in the following applications:
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Packaging, Storage & Formulations
| Storage |
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 degreesC as supplied. 3 months, 2 to 8 degreesC under sterile conditions after reconstitution. |
| Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
| Purity |
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain |
| Reconstitution Instructions |
Reconstitute at 100 μg/mL in sterile PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Mouse IL-21 Protein, CF
Background
Interleukin-21 (IL-21) is an approximately 14 kDa four-helix-bundle cytokine in the family of cytokines that utilize the common gamma chain ( gamma c ) as a receptor subunit. gamma c is also a subunit of the receptors for IL-2, IL-4, IL-7, IL-9, and IL-15 (1). IL-21 is produced by activated T follicular helper cells (Tfh), Th17 cells, and NKT cells (2-6). It exerts its biological effects through a heterodimeric receptor complex of gamma c and the IL-21-specific IL-21 R (2, 7). 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 (4, 8, 9). It is also required for the migration of dendritic cells to draining lymph nodes (10). IL-21 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 (3, 5, 6, 11, 12). It blocks the generation of regulatory T cells and their suppressive effects on CD4 + T cells (13, 14). IL-21 R engagement enhances the cytolytic activity and IFN-gamma production of activated NK cells but limits the expansion of resting NK cells (15). In addition, IL-21 suppresses cutaneous hypersensitivity reactions by limiting allergen-specific IgE production and mast cell degranulation (16). Dysregulation of the IL-21/IL-21 R system contributes to the development of multiple immunological disorders (1, 17). The mouse IL-21 precursor contains a predicted 17 amino acid (aa) signal sequence and a 129 aa mature chain. Mature mouse IL-21 shares 66%, 59%, 58%, and 88% aa sequence identity with mature canine, human, rabbit, and rat IL-21, respectively.
- Leonard, W.J. et al. (2008) J. Leukoc. Biol. 84:348.
- Parrish-Novak, et al. (2000) Nature 408:57.
- Coquet, J.M. et al. (2007) J. Immunol. 178:2827.
- Vogelzang, A. et al. (2008) Immunity 29:127.
- Korn, T. et al. (2007) Nature 448:484.
- Nurieva, R. et al. (2007) Nature 448:480.
- Asao, H. et al. (2001) J. Immunol. 167:1.
- Zotos, D. et al. (2010) J. Exp. Med. 207:365.
- Rankin, A.L. et al. (2011) J. Immunol. 186:667.
- Jin, H. et al. (2009) J. Clin. Invest. 119:47.
- Frohlich, A. et al. (2009) Science 324:1576.
- Yi, J.S., et al. (2009) Science 324:1572.
- Peluso, I. et al. (2007) J. Immunol. 178:732.
- Bucher, C. et al. (2009) Blood 114:5375.
- Kasaian, M.T. et al. (2002) Immunity 16:559.
- Tamagawa-Mineoka, R. et al. (2011) J. Invest. Dermatol. 131:1513.
- Ma, J. et al. (2011) Cytokine 56:133.
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