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. 2018 Jun 14;9:729. doi: 10.3389/fphys.2018.00729

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Copyright © 2018 Jin, Zhang, Zhao, Xu, Shao, Huang, Shi and Yang.

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 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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Pyrosequencing analysis of caecal bacteria. (A) Rarefaction curves. (B) Diversity indexes. Values are representative as means ± SEM. (C) Principal coordinates analysis of caecal bacteria at the OTU level. (D) Phylum-level abundance of 16S rRNA gene sequences from the cecum. CON, control group; SUS, simulated weightlessness group.