pcVSV-MOW15-22-S propagation kinetics in Caco2 cells expressing P.natACE2 or P.natACE2-C432N mutants at the indicated time points. Data are represented as mean SD for n= 3 biological replicates. RFU, relative fluorescence unit. TPCK-treated trypsin was present in the cells at 20 g/mL (DMEM + 2% FBS) in (D)(G).