Fig. 6. SARS-CoV-2 pseudovirus neutralization by naive and affinity-matured Abs.
(A) SARS-CoV-2 pseudovirus neutralization assay for 32 purified IgGs. Curves in color highlighted antibodies with neutralizing activity with donor and monovalent wild-type RBD affinity listed for this subset of antibodies. The neutralizing monoclonal antibody, B38, was used as a positive control. Dashed lines indicate IC50 values and data represent means ± SD of two technical replicates. (B) SARS-CoV-2 pseudovirus neutralization for select affinity matured progeny from the ab090 lineage with respective mutations relative to ab090 parent sequence, monovalent wild-type RBD affinity, and IC50 listed.