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. 2019 Sep 2;19:200. doi: 10.1186/s12866-019-1575-7

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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 Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — Separation of m-DAP and LL-DAP by reversed-phase HPLC after dabsylation, revealing the preponderance of m-DAP in all analysed peptidoglycan isolates. Overlay of chromatograms for T. forsythia peptidoglycan (green line), P. gingivalis peptidoglycan (yellow line) and E. coli peptidoglycan (black line) and the standards m-DAP (red line) and LL-DAP (blue line)