Certificate of Analysis

 
Product Name: Recombinant Human TNF-α (E. coli)
Catalog Number: M11495
Physical and Chemical Properties
Solubility: Reconstitute the lyophilized powder in ddH2O or PBS up to 100 μg/ml.
Storage: Stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days and at -20°C for 3 months.
Analytical Data
QC Standard: >98%, Endotoxin < 0.2 EU/μg
Product Information
Description: Recombinant human TNF-α protein (E. coli) is a homotrimer with a subunit molecular mass of 17.3 kDa. TNF-a plays a major role in growth regulation, differentiation, inflammation, viral replication, tumorigenesis, and autoimmune diseases; and in viral, bacterial, fungal, and parasitic infections. ED50 < 30.0 pg/ml, measured in a cytotoxicity assay using L-929 mouse fibrosarcoma cells in the presence of the metabolic inhibitor actinomycin D, corresponding to a specific activity of > 3.3 × 107 units/mg.
   
Stability and Solubility Advice: Information concerning product stability, particularly in solution, has rarely been reported and in most cases we can only offer a general guide.
We recommend that stock solutions, once prepared, are stored aliquoted in tightly sealed vials and used within 1 month. Avoid repeated freeze and thaw cycles. Storage conditions for some special products should refer to their storage details.