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. 2019 Dec 20;9:19559. doi: 10.1038/s41598-019-56085-8

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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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Maximum Likelihood tree of vertebrate Pax6 genes. Phylogenetic analysis of the lamprey Pax6 genes with Pax6, Pax4, Pax3 and Pax7 genes from several other chordate species. The Pax3/7 clade was specified as the outgroup. The phylogram is shown on the left and its cladogram on the right. The tree highlights clustering of the three lamprey genes with Pax6 genes from other chordates thereby indicating that they are indeed lamprey Pax6 genes.