Fig. 5.

Changes in the fluorescence of FITC-Ahx-H-d-(Dabcyl) peptide substrate in the presence Covid-19 live virus, Mers-CoV (10⁸ pfu/mL) and PBS buffer after 3 hours of incubation at 37°C. The samples were excited at 485 nm and the fluorescence was observed at 535 nm. The standard errors were calculated from the three different measurements