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. 2017 Dec 6;8:2405. doi: 10.3389/fmicb.2017.02405

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Copyright © 2017 Xu, Ni, Liu, Yin, Li, Zhang, Wu, Tian, Shi and Wang.

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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Electron micrograph of the released P proteins. (B) Is the enlargement of the center part of (A), and the arrow indicates a pentagonal-ring structure for the particles. (C) Is a model of the cross-section of the P particle.