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. 2018 Jun 15;16:67. doi: 10.1186/s12915-018-0534-3

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© Weinkove et al. 2018

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. 5 — Folate preparations contain PABA-glu and PABA. Concentrations of (a) PABA-glu and (b) PABA as determined by LC-MS/MS in 10 and 100 μM folic acid preparations. Samples were folic acid from Schircks, Sigma, Boots and Schircks folic acid after addition to the agar media and incubation for 4 days at 25 °C. Error bars represent standard deviation over triplicate independent preparations. Full data in Additional file 4: Table S3