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. 2021 Aug 23;13(8):1667. doi: 10.3390/v13081667

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Neutralizing assay by DPP4 peptides. VeroE6 cells were inoculated with pseudotypes particles bearing the S proteins of the indicated Vsvpp.SARS-2-S WT or variants (i.e., D614G,B.1.1.7,P1,B.1.351), together with DPP4 _270–295, DPP4 _318–349, or a combination of the two. Trasduction efficiency was quantified by measuring virus encoded luciferase activity in cell lysates at 48 h post transduction and expressed as percentage. Data presented are the average from three biological replicates. Error bars indicate the standard deviation ±SD. * p < 0.05, ** p < 0.01, *** p < 0.001.