| Description : |
Human Interleukin-20 (IL-20) is encoded by the IL20 gene located on the chromosome 1 and belongs to the IL-10 family that including IL-10, IL-19, IL-22, IL-24, and IL-26. It is secreted by activated keratinocytes and monocytes, and signals through two distinct cell-surface receptor complexes on keratinocytes and other epithelial cells. IL-20 has functions of regulating proliferation and differentiation of keratinocytes during inflammation, and causing cell expansion of multipotential hematopoietic progenitor cells. |
| Source : |
E. coli |
| Species : |
Human |
| Form : |
Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.2, with trehalose. |
| Bio-activity : |
Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human IL-20Rα and human IL-20Rβ co-transfected murine BaF3 pro-B cells is less than 0.5 ng/ml, corresponding to a specific activity of > 2.0 × 10^6 IU/mg. |
| Molecular Mass : |
Approximately 17.6 kDa, a single non-glycosylated polypeptide chain containing 153 amino acids. |
| AA Sequence : |
MLKTLNLGSCVIATNLQEIRNGFSE IRGSVQAKDGNIDIRILRRTESLQD TKPANRCCLLRHLLRLYLDRVFKNY QTPDHYTLRKISSLANSFLTIKKDL RLCHAHMTCHCGEEAMKKYSQILSH FEKLEPQAAVVKALGELDILLQWME ETE |
| Endotoxin : |
Less than 1 EU/µg of rHuIL-20 as determined by LAL method. |
| Purity : |
> 95 % by SDS-PAGE and HPLC analyses. |
| Storage : |
This lyophilized preparation is stable at 2-8 centigrade, but should be kept at -20 centigrade for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8 centigrade. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20 centigrade to -70 centigrade. Avoid repeated freeze/thaw cycles. |
| Reconstitution : |
Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 centigrade. Further dilutions should be made in appropriate buffered solutions. |
| Quality Statement : |
Our GMP proteins are produced according to relevant sections of the following documents: WHO TRS, No. 822, 1992 Annex 1, Good Manufacturing Practices for Biological Products; USP Chapter 1043, Ancillary Materials for Cell, Gene and Tissue-Engineered Products and USP Chapter 92, Growth Factors and Cytokines Used in Cell Therapy Manufacturing. |
| Shipping : |
The product is shipped at ambient temperature. Upon receipt, store it immediately at the recommended temperature. |
