Fig. 5
RDS inhibits SARS-CoV pseudovirus infection of A549(ACE2) cells. A and B Cells were pretreated with serially diluted RDS, and infected with SARS-CoV(GFP) (A) or SARS-CoV(Luc) B pseudovirus. Cells were washed to remove the virus and RDS, and cultured in the absence of RDS. Inhibition of viral infection was quantified at 48 h or 72 h post infection by flow cytometry or luciferase assay. The assay was performed in triplicate. The dose–response curve was plotted, and the IC50 of RDS was determined to be at 1:70.9 dilution (C)