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. 2017 Dec 13;8:2113. doi: 10.1038/s41467-017-02216-6

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© The Author(s) 2017

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. 2 — AP-nanoPALDI mass spectra from a mouse hippocampal tissue slice and standard materials in the positive ion mode. a Mass spectra from a mouse hippocampal tissue slice in the range of m/z = 100–500. The plasma background has been subtracted from the spectra. AP-nanoPALDI MS/MS of b compound at m/z = 385.346 in the hippocampal tissue slice, c compound at m/z = 136.061 in the hippocampal tissue slice, d standard cholesterol, and e standard adenine