| Description : |
Interleukin 13 (IL-13) is a protein that in humans is encoded by the IL13 gene. IL-13 was first cloned in 1993 and is located on chromosome 5q31 with a length of 1.4kb. It has a mass of 13 kDa and folds into 4 alpha helical bundles. The secondary structural features of IL-13 are similar to that of Interleukin 4 (IL-4); however it only has 25% sequence homology to IL-4 and is capable of IL-4 independent signaling. IL-13 is a cytokine secreted by T helper type 2 (Th2) cells, CD4 cells, Natural killer T cell, Mast cell, Basophil cells, Eosinophil cells and Nuocyte cells. Interleukin-13 is a central regulator in IgE synthesis, goblet cell hyperplasia, mucus hypersecretion, airway hyperresponsiveness, fibrosis and chitinase up-regulation. It is a mediator of allergic inflammation and different diseases including asthma. |
| Source : |
Escherichia coli |
| Species : |
Mouse |
| Tag : |
His |
| Form : |
Lyophilized powder |
| AA Sequence : |
MPVPRSVSLPLTLKELIEELSNITQ DQTPLCNGSMVWSVDLAAGGFCVAL DSLTNISNCNAIYRTQRILHGLCNR KAPTTVSSLPDTKIEVAHFI
TKLLSYTKQLFRHGPF with polyhistidine tag at the C-terminus |
| Endotoxin : |
<0.1 EU per 1 μg of the protein by the LAL method. |
| Bio-activity : |
Measure by its ability to induce TF-1 cells proliferation. The ED50 for this effect is <4 ng/mL. The specific activity of recombinant mouse IL-13 is > 2.5 x 10^5 IU/mg. |
| Purity : |
>95% as determined by SDS-PAGE. Ni-NTA chromatography |
| Storage Buffer : |
The protein was lyophilized from a solution containing 1X PBS, pH 7.4. |
| Reconstitution : |
It is recommended to reconstitute the lyophilized protein in sterile H2O to a concentration not less than 100 μg/mL and incubate the stock solution for at least 20 min to ensure sufficient re-dissolved. |
| Storage : |
Lyophilized protein should be stored at -20°C. Upon reconstitution, protein aliquots should be stored at -20°C or -80°C. |
| Notes : |
Please use within one month after protein reconstitution. |
