Recombinant Rat TNF-α

Code Description Price Qty
GFR18-5 Rat TNF-α, 5 μg $75.00
GFR18-20 Rat TNF-α, 20 μg $189.00
GFR18-100 Rat TNF-α, 100 μg $469.00
GFR18-1000 Rat TNF-α, 1 mg $3,382.00
Cytolysis of mouse L929 cells in the presence of Actinomycin D for Rat TNF-α. Cell viability was measured to calculate the ED50, which is as expected less than 50 pg/ml.

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Tumor Necrosis Factor α (TNF-α) is an inflammatory cytokine secreted by macrophages, monocytes, neutrophils, T cells, and Natural Killer (NK) cells following stimulation by bacterial lipopolysaccharide (LPS). TNF-α signal activation occurs through two receptors, TNFR1 and TNFR2. TNFR1 is expressed on most cell types, unlike TNFR2, which is expressed mainly on immune cells. TNF-α functions to stimulate phagocytosis in macrophages, chemoattract neutrophils, increase insulin resistance, and induce fever.

Activity Assay

Rat TNF-α (Animal-Free) is fully biologically active when compared to standard. The activity is determined by the cytolysis of mouse L929 cells in the presence of Actinomycin D and it is typically less than 50 pg/ml. This corresponds to an expected specific activity of 2.0 x 107 units/mg.

AA Sequence


Alternative Names

Tumor Necrosis Factor α, TNFa, TNFα, TNFSF2, cachectin, DIF, necrosin, cytotoxin, cachexin, TNF
Product Details
Length 158 aa
Molecular Weight 17.5 kDa
Structure Monomer
Source E. coli
Accession Number P01375
Purity ≥95% determined by reducing and non-reducing SDS-PAGE
Endotoxin Level ≤1.00 EU/μg as measured by kinetic LAL
Formulation Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 10 mM sodium phosphate, pH 7.5
Reconstitution Centrifuge vial before opening. When reconstituting the product, gently pipet and wash down the sides of the vial to ensure full recovery of the protein into solution. It is recommended to reconstitute the lyophilized product with sterile water at 0.1 mg/ml, which can be further diluted into other aqueous solutions.
Stability and Storage

12 months from date of receipt when stored at -20°C to -80°C as supplied. 1 month when stored at 4°C after reconstituting as directed.

Avoid freeze-thaw cycles