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. 2021 May 18;38(10):4238–4251. doi: 10.1093/molbev/msab152

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© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Phylogenetic tree and number of OR genes in 28 fish species. (A) Phylogenetic tree depicting the evolutionary relationships of 28 fish species. Genome of M. amblycephala sequenced in this study is highlighted in red. Habitat and feeding habits are depicted for each species. Bars represent the total OR numbers. (B) The number of OR genes from each subfamily across 28 fish species. Red, yellow and blue bars represent intact genes, truncated genes and pseudogenes, respectively. “Water,” “Air,” and “Water/Air” represent the detection of water-soluble, airborne and both water and airborne odorants, respectively.