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. 2021 Jun 17;12:666600. doi: 10.3389/fphar.2021.666600

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Copyright © 2021 Campione, Lanna, Cosio, Rosa, Conte, Iacovelli, Romeo, Falconi, Del Vecchio, Franchin, Lia, Minieri, Chiaramonte, Ciotti, Nuccetelli, Terrinoni, Iannuzzi, Coppeda, Magrini, Bernardini, Sabatini, Rosapepe, Bartoletti, Moricca, Di Lorenzo, Andreoni, Sarmati, Miani, Piscitelli, Valenti and Bianchi.

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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Comparison of the Frodock best complex and ACE2-spike glycoprotein (PDB ID: 6LZG). The red, blue, and green solid surfaces represent the three different chains composing the spike glycoprotein. The black ribbons highlight the CTD1 domain in the up conformation. The magenta and yellow ribbons represent the ACE2 (A) and the bovine lactoferrin (B), respectively, surrounded by a transparent molecular surface representation, in order to point out the positions occupied in the space by the different structures.