Human TNF-alpha / TNFA Protein

Species : Human

Synonyms : DIF,TNF-alpha,TNFA,TNFSF2

Host : E. coli

Purity :> 95 % as determined by SDS-PAGE

Activity : Measured in a cytotoxicity assay using L929 mouse fibrosarcoma cells in the presence of the metabolic inhibitor actinomycin D.The ED₅₀?for this effect is typically 5-50pg/mL.The specific activity of Recombinant Human TNF-alpha is approximately 52000 IU/£gg,which is calibrated against human TNF-alpha WHO International Standard(NIBSC code:12/154).