Recombinant Human TNF-β (E.coli-derived)
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
Description | TNF-β is a potent mediator of inflammatory and immune responses. It belongs to the TNF family of ligands and signals through TNFR1 and TNFR2. TNF-β is produced by activated T and B lymphocytes, and has similar activities to TNF-α. Like TNF-α, TNF-β is involved in the regulation of various biological processes including cell proliferation, differentiation, apoptosis, lipid metabolism, coagulation, and neurotransmission. TNF-β is secreted as a soluble polypeptide, but can form heterotrimers with lymphotoxin-β, which effectively anchors the TNF-β to the cell surface. TNF-β is cytotoxic to a wide range of tumor cells. Recombinant human TNF-β is a secreted 171 amino acid protein (18.6 kDa) which forms an active non-disulfide linked homotrimer structure in solution. |
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BiologicalActivity | The ED50 as determined by the cytolysis of murine L929 cells in the presence of Actinomycin-D is ≤ 0.05 ng/ml, corresponding to a specific activity of ≥ 2 x 107 units/mg. |
Authenticity | Verified by N-terminal and Mass Spectrometry analyses (when applicable). |
Endotoxin | Endotoxin level is <0.1 ng/ µg of protein (<1EU/ µg). |
Protein Content | Verified by UV Spectroscopy and/or SDS-PAGE gel. |
Storage | -20°C |
Precautions | Recombinant Human TNF-β (E.coli-derived) is for research use only and not for use in diagnostic or therapeutic procedures. |
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