QQ交谈10ug重组人肿瘤坏死因子-α,Human TNF-a
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- 上海高创化学科技有限公司
- 2015-12-23 18:27:21
- 上海市
- 以色列
- 616
【简单介绍】
【详细说明】
| Catalogue Number | CYT-223 | |||||||||
| Synonyms | TNF-alpha, Tumor necrosis factor ligand superfamily member 2, TNF-a, Cachectin, DIF, TNFA, TNFSF2. | |||||||||
| Introduction | Tumor necrosis factor is a cytokine involved in systemic inflammation and is a member of a group of cytokines that all stimulate the acute phase reaction. TNF is mainly secreted by macrophages. TNF causes apoptotic cell death, cellular proliferation, differentiation, inflammation, tumorigenesis and viral replication, TNF is also involved in lipid metabolism, and coagulation. TNF's primary role is in the regulation of immune cells. Dysregulation and, in particular, overproduction of TNF have been implicated in a variety of human diseases- autoimmune diseases, insulin resistance, and cancer. | |||||||||
| Description | Tumor Necrosis Factor-a Human Recombinant produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 158 amino acids （157 a.a. of the mature human TNF-alpha and an N-terminal methionine） and having a molecular mass of 17.5kDa. The TNF-alpha is purified by standard chromatographic techniques. | |||||||||
| Source | Escherichia Coli. | |||||||||
| Physical Appearance | Sterile Filtered White lyophilized （freeze-dried） powder. | |||||||||
| Formulation | 1mg of TNF-alpha Human contain 20mM PB, pH-7.2, and 100mM NaCl. | |||||||||
| Solubility | It is recommended to reconstitute the lyophilized Tumor Necrosis Factor-alpha in sterile 18MΩ-cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions. | |||||||||
| Stability | Lyophilized Tumor Necrosis Factor-a although stable at room temperature for 3 weeks, should be stored desiccated below -18°C. Upon reconstitution TNF-a should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein （0.1% HSA or BSA）. Please prevent freeze-thaw cycles. | |||||||||
| Purity | Greater than 95.0% as determined by: （a） Analysis by RP-HPLC. （b） Analysis by SDS-PAGE. | |||||||||
| Amino acid sequence | MVRSSSRTPS DKPVAHVVAN PQAEGQLQWL NRRANALLAN GVELRDNQLV VPSEGLYLIY SQVLFKGQGC PSTHVLLTHT ISRIAVSYQT KVNLLSAIKS PCQRETPEGA E AKPWYEPIY LGGVFQLEKG DRLSAEINRP DYLDFAESGQ VYFGIIAL. | |||||||||
| Biological Activity | The Specific Activity is >5.0×107 IU/mg as determined by the cytolysis of murine L929 cells in the presence of Actinomycin D. | |||||||||
| Protein content | Protein quantitation was carried out by two independent methods 1. UV spectroscopy at 280 nm using the absorbency value of 1.234 as the extinction coefficient for a 0.1% （1mg/ml） solution. This value is calculated by the PC GENE computer analysis program of protein sequences （InliGenetics）. 2. Analysis by RP-HPLC, using a calibrated solution of TNF-a as a Reference Standard. | |||||||||
| References | 1.Title: Radiation-triggered Tumor Necrosis Factor （TNF） ?-NF?B Cross-signaling Favors Survival Advantage in Human Neuroblastoma Cells* 3.Title:Common Inhibitory Serine Sites Phosphorylated by IRS-1 Kinases, Triggered by Insulin and Inducers of Insulin Resistance. | |||||||||
| Usage | Prospec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals. | |||||||||
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