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. 2019 Mar 19;9:62. doi: 10.3389/fcimb.2019.00062

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Copyright © 2019 Zhang, Ku, Zhang, Zhang, Chen, Chen, Zeng, Li, Zhu and He.

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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Phylogenetic tree of luxS gene from the completely sequenced genomes in the KEGG genome database. The maximum likelihood algorithm method with the GTR nucleotide substitution model was used when constructed the phylogenetic tree (bootstrap analysis with 1,000 replicates).