Figure 4

A7 Fab inhibits the binding of SARS-CoV-2 S1 protein to human ACE2. (A) The scheme for carrying out ELISA to verify the inhibition effect of A7 Fab. hACE2: recombinant human ACE2. (B) ELISA result showing that the binding between SARS-CoV-2 S1 and hACE2 is inhibited by A7 Fab. n = 3; Data have been expressed as mean ± standard deviation.