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. 2016 Nov 24;33(1):13. doi: 10.1007/s11274-016-2177-2

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© The Author(s) 2016

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.

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Fig. 3 — Results of principal component analysis (PCA) based on data of biochemical and chemical parameters in post-culture filtrate of five keratinolytic strains PA proteolytic activity; KA keratinolytic activity; NH4 ammonium ions; SO4 sulfate ions; pH pH, pr soluble proteins and peptides