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. 2019 Dec 20;10:5822. doi: 10.1038/s41467-019-13786-y

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — a–c Top and side view cartoon representations of CA pentamers with α-helices shown as cylinders, from a HML2 CA^rec, b RSV (built from PDB: 1EM9 and 3G1I docked into EMD 5772) and c HIV-1 (PDB: 5MCY). NTDs are coloured pink, red and purple and CTDs are coloured light cyan, light blue and cyan for HML2, RSV and HIV-1, respectively. Pentamers are aligned with respect to their CTDs. In the lower panels, the distance between the centre of mass (CoM) for each NTD and CTD ring is shown on the right. d Central section through CA pentamers aligned with respect to CTDs. The CoM for NTD and CTD rings is represented by the spheres, colour coded as in a–c and shows the coincident CoM for CTDs and the difference in CTD–NTD vertical displacement for each pentamer.