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Recombinant Human TNF-α Protein (rp156007) - Protein Bioactivity
Measured in a cytotoxicity assay using L‑929 mouse fibroblast cells in the presence of the metabolic inhibitor actinomycin D. The ED₅₀ for this effect is 20-100 pg/mL.
Purity:>95%, by SDS-PAGE visualized with Coomassie® Blue Staining
Description:
Tumor necrosis factor alpha (TNF-alpha), also known as cachectin and TNFSF2, is the prototypic ligand of the TNF superfamily. It is a pleiotropic molecule that plays a central role in inflammation, immune system development, apoptosis, and lipid metabolism. Human TNF-alpha consists of a 35 amino acid (aa) cytoplasmic domain, a 21 aa transmembrane segment, and a 177 aa extracellular domain (ECD). Within the ECD, human TNF-alpha shares 97% aa sequence identity with rhesus and 71%-92% with bovine, canine, cotton rat, equine, feline, mouse, porcine, and rat TNF-alpha. TNF-alpha is produced by a wide variety of immune, epithelial, endothelial, and tumor cells. TNF-alpha is assembled intracellularly to form a noncovalently linked homotrimer which is expressed on the cell surface. Cell surface TNF-alpha can induce the lysis of neighboring tumor cells and virus-infected cells, and it can generate its own downstream cell signaling following ligation by soluble TNFR I. Shedding of membrane-bound TNF-alpha by TACE/ADAM17 releases the bioactive cytokine, a 55 kDa soluble trimer of the TNF-alpha extracellular domain. TNF-alpha binds the ubiquitous 55-60 kDa TNF RI and the hematopoietic cell-restricted 80 kDa TNF RII, both of which are also expressed as homotrimers. Both type I and type II receptors bind TNF-alpha with comparable affinity, although only TNF RI contains a cytoplasmic death domain which triggers the activation of apoptosis. Soluble forms of both types of receptors are released and can neutralize the biological activity of TNF-alpha.
Recombinant Human TNF-α Protein (rp156007) - Protein Bioactivity
Measured in a cytotoxicity assay using L‑929 mouse fibroblast cells in the presence of the metabolic inhibitor actinomycin D. The ED₅₀ for this effect is 20-100 pg/mL.
Recombinant Human TNF-α Protein (rp156007) - SDS-PAGE
1.5 μg/lane of Recombinant Human TNF-α Protein was resolved with SDS-PAGE under reducing (R) and non-reducing (N) conditions and visualized by Coomassie® Blue staining, showing a band at 17.6 kDa.
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 | |
| 分析证书 | rp156007 |
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