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. 2019 Feb 5;6:1. doi: 10.3389/fmolb.2019.00001

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Copyright © 2019 Piepenbrink.

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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Neisseria gonnorheae type IV pili. (A) Ribbon diagram of PilE monomer. (B) Structure of a N. gonnorheae type IV pilus (PDBID: 5VXX). (C) Salt bridges between the side-chain of glutamate 5 and the amino terminus (F1) of the i + 1 pilin, 3DEM electron density is shown as a blue mesh.