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. 2020 Feb 6;10:1973. doi: 10.1038/s41598-020-58584-5

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© The Author(s) 2020

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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Aboral and oral views of animals used in this study (Hemicentrotus pulcherrimus) are shown. Animals lacking functional PKS gene are lacking pigment throughout the test, spines, and tube feet. The same phenotype is seen for animals lacking GCM. Animals lacking FMO3 instead reveal pastel purple throughout their spines, but all other features of the adult are the same as in the wild-type control. Scale bar = 1 cm.