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. 2019 Jul 30;9:11027. doi: 10.1038/s41598-019-47299-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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Comparison of MALDI-ToF-MS spectra from the bag, eraser and destructive ZooMS methods for sample DR-1662s, showing peaks used to identify it as bear. (A) Bag vs destructive; (B) bag vs eraser; (C) eraser vs destructive; (D) close up of spectra in (A) showing poor resolution of high molecular weight peptides in the bag compared to the destructive method. Bag method spectra shown in blue, eraser method spectra in green and destructive method spectra in purple.