| abstract |
The present invention provides methods and compositions for expressing a protease or pro-protease in cells that do not naturally express the protease or pro-protease. The invention further provides methods of producing viruses, e.g., influenza viruses, in such cells. The invention also provides methods for increasing the titer of influenza viruses grown in cells that express such a heterologous protease or pro-protease. Additionally, the invention provides a protease from Streptomyces griseus useful in the methods and compositions. |