Produceret i kinesiske hamsteres ovarieceller (CHO- K1) ved rekombinant DNA- teknologi.
* Million International Units, measured by cytopathic effect (CPE) bioassay against the in house IFN beta-1a standard which is calibrated against the current international NIH standard (GB-23-902-531). ** produced in Chinese hamster ovary Cells (CHO-K1) by recombinant DNA technology.