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. 2020 Jan 10;10:2855. doi: 10.3389/fmicb.2019.02855

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Copyright © 2020 Yan, Li, Yue, Wang, Zhao, Evivie, Li and Huo.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Loading and score plots of principal component analysis. (A) Loading plot for results of five different antioxidant assays. RACFS (CFE), reducing activity of cell-free supernatant (CFS) [cell-free extract (CFE)]; DPPH CFS (CFE), 1,1-diphenyl-2-picryl-hydrazyl (DPPH)-scavenging activity of CFS (CFE); HRCFS (CFE), hydroxyl radical-scavenging activity of CFS (CFE); SARCFS (CFE), superoxide anion radical-scavenging activity of CFS (CFE); LPCFS (CFE), lipid peroxidation inhibition capacity of CFS (CFE). (B) Score plot of the antioxidative properties of Lactobacillus strains. PC1, first principal component; PC2, second principal component.