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. 2022 Nov 18;5:1262. doi: 10.1038/s42003-022-04190-2

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© The Author(s) 2022

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. 4 — a Dendrogram showing clustering of microbial composition data using centred log-ratio (CLR) transformed counts and Aitchinson distance, using species set ‘all’. Green inset shows structure among ancient samples only. b Bar plots showing Grade of Membership (GoM) for ancient calculus and selected modern samples for k = 5 components, using species set ‘all’ (Supplementary Data 23). c GoM of oral samples for k = 4 components, using the species set ‘oral’ (Supplementary Data 23).