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. 2014 Sep 5;5:29. doi: 10.1186/2041-9139-5-29

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Copyright © 2014 Gazave et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Scenario of Platynereis Hes/Hey-related genes subfunctionalisation after duplications from a multifunctional Pdu-Hes-ancestral gene. Phylogenetic relationships of Platynereis Hes/Hey-related genes are represented in a simple tree in front of which expression patterns are mapped. Expression patterns related to segmentation process, neurogenesis, chaetogenesis, in the stomodeum and the midgut are respectively coded in green, pink, yellow, blue and orange. A putative ancestral multifunctional Platynereis Hes-like gene is represented. Present expression patterns and evolutionary history of Hes/Hey-related genes may be the result of numerous duplication-degeneration-complementation (DDC) events.