Expression of Factor X in BHK-21 Cells Promotes Low Pathogenic Influenza Viruses Replication

Figure 3

Immunofluorescent detection of influenza virus NP in infected-BHK-21/FX cells (×100). Fluorescence emission was detected in the infected cells at 24 and 72 hours post infection compared to the virus infected-BHK-21 cells supplemented with trypsin and without trypsin.