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. 2022 Jul 6;13:942037. doi: 10.3389/fphys.2022.942037

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Copyright © 2022 Niu, Zhang, Xu, Li, Zhang, Wu, Storey and Chen.

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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Antioxidant enzyme activity and total antioxidant capacity (T-AOC) in heart, brain, liver, and muscle of low-altitude and high-altitude adult frogs. (A) superoxide dismutase (SOD) activity, (B) catalase (CAT) activity, (C) glutathione peroxidase (GPX) activity, (D) glutathione-S-transferase (GST) activity, (E) glutathione reductase (GR) activity and (F) total antioxidant capacity (T-AOC). Values are presented as mean ± SEM (n = 8). Asterisks (*p < 0.05; **p < 0.01; ***p < 0.001) indicate significant difference between two populations.