6.1.2  Rational: The chimeric 47D11 H2L2 might not be effective in human lung cells as it is in vitro
47D11 carried a higher affinity for interacting with the S2 subunit of SARS-S than that of SARS-2-S. It is important that for both SARS-S and SARS-2-S, the binding of the 47D11 antibody to the target – the S1B domain – does not block the binding of S1B and S2 to ACE2 receptor [26]. By contrast, neutralizing antibodies that specifically target SARS-S could compete with S1B and S2 for binding to ACE2.