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. 2022 May 18;13:820336. doi: 10.3389/fimmu.2022.820336

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Copyright © 2022 Yang, Lin, Sun, Chen, Yang, Lin, Guo, Wang, Wen, Zhang, Dai, He, Cao, Dong, Liu, Chen, Li, Zhao and Lu

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Improvement of the neutralizing activity of Nb-007 by fusion with Fc. (A) Diagram (left panel) showing the bivalency of Nb-007 by fusion with the Fc domain of human IgG1. The SDS-PAGE analysis of the purified Nb-007-Fc protein is shown in the right panel. (B) Neutralization of SARS-CoV-2 pseudovirus by Nb-007-Fc. Left panel: Nb-007-Fc against the pseudovirus of the original SARS-CoV-2 strain. Right panel: Nb-007-Fc against pseudovirus of the Delta variant. Each error bar shows the mean ± SD. Experiments were performed in triplicate.