| Description : |
Tumor necrosis factor alpha (TNF-α), also called cachectin, is produced by neutrophils, activated lymphocytes, macrophages, NK cells, LAK cells, astrocytes endothelial cells, smooth muscle cells and some transformed cells. TNF-α occurs as a secreted, soluble form and as a membrane-anchored form, both of which are biologically active. The naturally-occurring form of TNF-α is glycosylated, but non-glycosylated recombinant TNF-α has comparable biological activity. The biologically active native form of TNF-α is reportedly a trimer. Two types of receptors for TNF-α have been described and virtually all cell types studied show the presence of one or both of these receptor types. |
| Source : |
E. coli |
| Species : |
Rat |
| Form : |
Sterile Filtered White lyophilized (freeze-dried) powder. |
| Bio-activity : |
Fully biologically active when compared to standard. The Specific Activity is ≥5.0 × 10^7 IU/mg as determined by the cytolysis of murine L929 cells in the presence of Actinomycin D. |
| Molecular Mass : |
Approximately 17.3 kDa. a single, non-glycosylated polypeptide chain containing 157 amino acids. |
| Protein Length : |
157 |
| AA Sequence : |
MLRSSSQNSSDKPVVHVVANHQAEE QLEWLSQRANALLANGMDLKDNQLV VPADGLYLIYSQVLFKGQGCPDYVL LTHTVSRFATSYQEKVSLLSAIKSP CPKDTPEGAELKPWYEPMYLGGVSQ LEKGDLLSAEVNLPKYLDITESGQV YFGVIAL |
| Endotoxin : |
Less than 1 EU/mg of rRtTNF-α 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 to -70 centigrade. Avoid repeated freeze/thaw cycles. |
| Storage Buffer : |
Lyophilized from a 0.2mm filtered concentrated solution in 20mM PB, pH7.2, 150mM NaCl. |
| Reconstitution : |
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. 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. |
