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. 2021 Jan 5;8:622632. doi: 10.3389/fchem.2020.622632

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Copyright © 2021 Sakkiah, Guo, Pan, Ji, Yavas, Azevedo, Hawes, Patterson and Hong.

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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Pie chart of statistics of the 4 clusters of Severe Acute Respiratory Syndrome Coronavirus-2 spike protein complexed with ACE2. Number of structures and percentages are indicated in each pie segment.