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. 2021 Mar 31;11:7236. doi: 10.1038/s41598-021-86740-y

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Serpin protein concentration in a set of B. longum subsp. longum strains grown for 16 h on MRSc medium supplemented with 1% glucose (black bars) or 1% galactose (grey bars). Bars represent means and standard deviations are shown. Panel A depicts B. longum subsp. longum strains able to rapidly grow on galactose as a sole carbon source). Panel B displays B. longum subp. longum strains not able to rapidly switch to galactose as a sole carbon source. These strains were grown on a medium supplemented with 1% glucose (black bars) or with a mixture of 0.2% glucose and 0.8% galactose (grey bars). P-values represent statistical difference to the glucose control groups. ****p < 0.0001.