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. 2018 Jan 24;8:1543. doi: 10.1038/s41598-018-19875-0

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© The Author(s) 2018

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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CG simulations reveal tail screening and tail-tail correlations in the NCP-NCP stacking contact. (A) Spatial distribution functions (SDF) showing the averaged particle densities around the central NCP (DNA, dark grey, HO, light grey) of DNA from the outside NCPs (grey), densities of the H4 and H2A N-termini belonging to the central NCP (H2A, yellow; H4, green) and external NCPs (H2A, yellow-orange; H4, cyan). (B) Detailed views of the internal and external SDFs of the H2A and H4 tails near the top and bottom surfaces of the central NCP. The colour scheme is the same as in (A) The top cartoon in (B) shows that there are two areas populated by the external H2A tail (indicated by black arrows). In (A) and (B), the beads of phosphates, H3, H2B tails, external HO and of CoHex³⁺ ions are not shown.