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. 2019 Sep 24;9:13726. doi: 10.1038/s41598-019-49396-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Heme oxygenase amino acid sequence. (a) Alignment of HOs from several insects and human HO-1, comparing the most important residues in the heme interaction. Residues that contact to heme (red); hydrophobic residues wall (blue); residues that exhibit interaction with propionates (green box) and polar residues clusters (yellow box). (b) Neighbor-Joining phylogenetic tree for insects and human HOs. The optimal tree with the sum of branch length = 3.03131229 is shown. The tree is drawn to scale, with branch lengths (next to the branches) in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the Poisson correction method and are in the units of the number of amino acid substitutions per site. (c) Percent identity matrix based on alignment (Clustal Omega).