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. 2016 Dec 20;7:1998. doi: 10.3389/fmicb.2016.01998

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Copyright © 2016 Tremonte, Succi, Coppola, Sorrentino, Tipaldi, Picariello, Pannella and Fraternali.

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) or licensor 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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Opened view of the Model_USP-691. The grid represents the interfaces involved into dimeric (Dc) and tetrameric (Tc) contact. The chains are represented in green (chain_A), cyan (chain_B), magenta (chain_C), and yellow (chain_D).