R&D Systems now offers its own in-house manufactured versions of Recombinant Human and Mouse IFN-beta that offer a much better value than the closest competitor. Compare quantity, units, activity, endotoxin levels, and units per dollar for yourself using the table below.
|Buy Human IFN-beta||Buy Mouse IFN-beta|
*Mass was calculated for competitor proteins using the Certificate of Analysis provided with the product. The equivalent units for R&D Systems IFN-beta were extrapolated and both units and mass are shown for a direct comparison. To determine the ED50, proteins were compared side-by-side in an anti-viral assay using L 929 mouse fibroblast cells or Hela human cervical carcimoma cells infected with encephalomyocarditis (EMC) virus.
**Units were calibrated against Recombinant Human IFN-beta WHO international standard (NIBSC code 00/572).