ART4 and infection: After the inoculation of tenfold-diluted (10−1) pseudovirus FLuc-Sco-S-eGFP, FLuc-SARS-S, or FLuc-VSV-G, all 11 tested cells showed luciferase activity (RLU) stronger than those from 293T cells inoculated with the pseudovirus without the glycoprotein on the surface (△env) as mock infection control (Figure 6).