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. 2019 Oct 29;9:15459. doi: 10.1038/s41598-019-51863-w

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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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Schematic representation for PBI-DdeI satellite DNA (satDNA) genomic distribution in the snakes studied. Phylogeny was partially derived from Pyron et al.³⁰. Divergence times were estimated in million years ago for each node⁴⁴. The tree summarizes the results of the dot blot derived from Supplementary Fig. S1, PBI-DdeI copy number is derived from Supplementary Table S7 based on qPCR results, while the classification of satDNA subfamilies is derived from Fig. 2.