Certificate of Analysis
| Product Name: | Recombinant Human TNF-β (E. coli) |
| Catalog Number: | M21057 |
Physical and Chemical Properties
| Solubility: | Reconstitute the lyophilized powder in ddH₂O or PBS up to 100 μg/ml. |
| Storage: |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Analytical Data
| QC Standard: | >95% , Endotoxin < 0.2 EU/μg |
Product Information
| Description: | ED50 < 4.0 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 > 2.5 × 108 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. |