Fig. 2. 3E8 blocked the bindings of recombinant S1 or RBD from multiple coronaviruses and SARS-CoV-2 variants to Fc-tagged recombinant human ACE2 protein.
a–e Bindings of His-tagged S1 or RBD (in d only) from different coronaviruses including SARS-CoV, HCoV-NL63, SARS-CoV-2, and emerging epidemic SARS-CoV-2 variants to recombinant human ACE2 protein were blocked by 3E8. f The IC50 values of 3E8 in blocking S1 or RBD binding to human ACE2 protein