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. 2020 Jan 22;10:1001. doi: 10.1038/s41598-020-57735-y

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© The Author(s) 2020

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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Zooarchaeology by Mass Spectrometry (ZooMS) taxonomic identifications overlain on a schematic of a cladogram for bone remains from Tsagaan Asga. Specimens with conclusive markers are shown in color (blue, red, and black), while those with missing markers are shown in tan according to the greatest possible level of taxonomic specificity. Circles have been scaled to size according to quantity of identified specimens in each category. The unknown rodent was identified based on morphology to the subfamily of Arvicolinae (voles, lemmings, and muskrats). Dotted circle in top left shows specimens with insufficient collagen for analysis.