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. 2019 Mar 7;10:15. doi: 10.1186/s40104-019-0323-z

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© The Author(s). 2019

Open Access This 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. 2 — Extracellular proteolytic activity of LAB isolates at pH 5, pH 6.5 and pH 8. Values are mean ± standard error mean (SEM), n = 3. Vertical bars represent SEM. Values bearing different capital letter alphabets (A-F) among bacteria isolates are significant different (P < 0.05) while values sharing different small letter alphabet (a-c) among various pH are significant different (P < 0.05)