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. 2019 Nov 25;10:5346. doi: 10.1038/s41467-019-13064-x

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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 — Structure of triplex and the functional significance of Tri1 N-anchor. a Distribution of triplexes Ta, Tb, Tc, Td, and Te among three types of hexons (C, E, and P) and a penton. b Enlarged view of a triplex Td with three adjacent hexon MCP subunits labeled (C1, E5, and P4). MCP subunits have been faded. c Further enhanced structure of triplex Td, rotated 90 degrees clockwise on the x axis from b. d Model of Tri1 with labeled domains. e Top and bottom views of b, showing that triplex Td is anchored to the capsid floor by the “V”-shaped Tri1 N-anchor (in pink). f Triplex Td viewed from inside of the capsid (left), counterclockwise rotation of Tri2A by 120 degrees about a local threefold axis results in a superposition of clamp and trunk domains from Tri2A to those from Tri2B, suggesting a high level of similarity (right). g Pipe-and-plank representations of Tri2 dimer in side (left panel) and top (right panel) views showing the helix bundle formed from Tri2A and Tri2B’s embracing arm domains. h Two orthogonal views of superposition of Tri2A and Tri2B showing nearly identical clamp and trunk domains, but different embracing arms. See also Supplementary Movie 6.