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. 2018 Apr 5;9:656. doi: 10.3389/fmicb.2018.00656

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Copyright © 2018 Firrao, Torelli, Polano, Ferrante, Ferrini, Martini, Marcelletti, Scortichini and Ermacora.

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 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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Drawing of part of the hrp cluster of Psa, with the location of the insertion of (A) ISPsy31 in strain CRAFRU 12.29 and (B) ISPsy36 in strain CRAFRU 12.50.