id author title date pages extension mime words sentences flesch summary cache txt cord-323967-2mo915u1 Miersch, Shane Tetravalent SARS-CoV-2 Neutralizing Antibodies Show Enhanced Potency and Resistance to Escape Mutations 2020-11-01 .txt text/plain 3231 173 57 Moreover, structural studies reveal that the best nAb targets the host receptor binding site of the virus spike protein, and thus, its tetravalent version can block virus infection with a potency that exceeds that of the bivalent IgG by an order of magnitude. Moreover, the use of a highly stable framework 77 enabled facile and modular design of ultra-high affinity nAbs in tetravalent formats that retained 78 favorable drug-like properties and exhibited neutralization potencies that greatly exceeded those 79 of the bivalent IgG format. Fab-phage were screened by ELISA and those that exhibited >50% loss in binding 92 to RBD in the presence of 200 nM ACE2 were sequenced, revealing 34 unique clones (Fig. 1A) , 93 deemed to be potential nAbs and converted into the full-length human IgG1 format for 94 purification and functional characterization. ./cache/cord-323967-2mo915u1.txt ./txt/cord-323967-2mo915u1.txt