Recombinant Human TNF-α (Animal-Free)

Product Details

Source

Human TNF-α, amino acids Val77-Leu233 (Accession# NM_000594), was expressed in E. coli.

Molecular Mass

The 157 amino acid recombinant protein has a predicted molecular mass of 17.4 kD. The predicted N-terminal amino acid is Val.

Purity

>98%, as determined by Coomassie stained SDS-PAGE and HPLC analysis.

Formulation

Lyophilized, carrier-free.

Endotoxin Level

Less than 0.1 ng per µg of protein.

Storage & Handling

Unopened vial can be stored at -20°C or -70°C. For maximum results, quick spin vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. It is recommended to further dilute in a buffer, such as 5% Trehalose, and store working aliquots at -20°C to -80°C. Avoid repeated freeze/thaw cycles.

Activity

The expected ED₅₀ is ≤ 0.05 ng/ml, corresponding to a specific activity of ≥ 2.0 x 10⁷ units/mg, as determined by the cytolysis of murine L929 cells in the presence of Actinomyocin D.

Application

Bioassay

Application Notes

This product is reactive with human, cow, monkey, mouse, rat, sheep, dog, and pig.

Product Citations

1. Trindade P, et al. 2020. Glia. 1396:68. PubMed
2. Deshmukh S, et al. 2017. Cancer Lett . 10.1016/j.canlet.2017.03.010. PubMed
3. Zhan D, et al. 2021. Bio Protoc. 11:e3119. PubMed

Antigen Details

Structure

Cytokine

Distribution

Activated monocytes, neutrophils, macrophages, T cells, B cells, NK cells, LAK cells.

Function

Type II integral membrane protein processed by TACE for secretion; upregulated by interferons, IL-2, GM-CSF, substance P, bradykinin, PAF, immune complexes, cyclooxygenase; downregulated by IL-6, TGF-β, vitamin D3, prostaglandin E2, PAF antagonists.

Interaction

Monocytes, neutrophils, macrophages, T cells, fibroblasts, endothelial cells, osteoclasts, adipocytes, astroglia, microglia.

Ligand/Receptor

TNFRSF1A (TNF-R1, CD120a, TNFR-p60 Type β, p55); TNFRSF1B (TNF-R2, CD120b, TNFR-p80 Type A, p75)

Bioactivity

Paracrine/endocrine mediator of inflammatory and immune functions; selectively cytotoxic for transformed cells; endothelial cell alterations; chemoattractant.

Biology Area

Cell Biology, Immunology, Neuroinflammation, Neuroscience

Molecular Family

Cytokines/Chemokines

Antigen References

1. Fitzgerald K, et al. Eds. 2001. The Cytokine FactsBook. Academic Press San Diego.
2. Beutler B, et al. 1988. Annu. Rev. Biochem. 57:505.
3. Beutler B, et al. 1989. Annu. Rev. Immunol. 7:625.
4. Tracey K, et al. 1993. Crit. Care Med. 21:S415.

Gene ID

7124 View all products for this Gene ID

UniProt

View information about TNF-alpha on UniProt.org

Documentation

• Technical data sheet
• Certificate of Analysis
• Safety Data Sheet

Reviews

Related Pages & Pathways

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Certificate of Analysis