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Recombinant Human Interleukin-15/IL-15 Protein (Active)
SKU: PKSH033630-100
Recombinant Human Interleukin-15/IL-15 Protein (Active)
| SKU # | PKSH033630 |
| Expression Host | E.coli |
Description
| Synonyms | IL-15, Interleukin 15, Interleukin-15, IL15 |
| Species | Human |
| Expression Host | E.coli |
| Sequence | Asn49-Ser162 |
| Accession | P40933 |
| Calculated Molecular Weight | 13.7 kDa |
| Observed Molecular Weight | 13 kDa |
| Tag | N-His |
| Bio-activity | Measure by its ability to induce proliferation in CTLL-2 cells. The ED50 for this effect is < 3 ng/mL. The specific activity of recombinant human IL-15 is > 2 x 106 IU/mg. |
Properties
| Purity | > 95 % as determined by reducing SDS-PAGE. |
| Endotoxin | < 0.01 EU per μg of the protein as determined by the LAL method. |
| Storage | Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months. |
| Shipping | This product is provided as lyophilized powder which is shipped with ice packs. |
| Formulation | Lyophilized from sterile PBS,pH 8.0. Normally 5% - 8% trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization. Please refer to the specific buffer information in the printed manual. |
| Reconstitution | Please refer to the printed manual for detailed information. |
Background
Human Interleukin 15 (IL-15) is a cytokine that regulates T cell and natural killer cell activation and proliferation. IL-15 binds to the alpha subunit of the IL15 receptor (IL-15RA) with high affinity. IL-15 also binds to the beta and gamma chains of the IL-2 receptor, but not the alpha subunit of the IL2 receptor. IL-15 is structurally and functionally related to IL-2. Both cytokines share some subunits of receptors, allowing them to compete for and negatively regulate each other's activity. The number of CD8+ memory T cells is controlled by a balance between IL-15 and IL-2. Despite their many overlapping functional properties, IL-2 and IL-15 are, in fact, quite distinct players in the immune system. IL-15 is constitutively expressed by a wide variety of cell types and tissues, including monocytes, macrophages and DCs. Mature Human IL-15 shares 70% amino acid sequence identity with Mouse and Rat IL-15.