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. 2016 Aug 3;5(10):1473–1484. doi: 10.1242/bio.015826

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© 2016. Published by The Company of Biologists Ltd

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.

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Fig. 1. — Domain structure and evolutionary conservation of the P54 RNA helicases P54a and P54b from zebrafish. (A) Conserved domains in P54 RNA helicases (NLS, Q, I, NES, Ia, Ib, II, III, IV, V and VI) are indicated in colored boxes. Zebrafish P54a and P54b proteins are compared with human RCK (Uniprot P26196) and CGH_1 from C. elegans (Wormbase C07H6.5) proteins. The central white boxes represent the conserved helicase region, and its percentage identity with RCK is shown. Gray boxes indicate C- and N-terminal variable regions. (B) Maximum likelihood tree of P54-related proteins. The scale indicates substitutions per site. The outgroup is represented by eIF4A RNA helicases from various organisms. CGH-1, Me31B, DDX6 and RCK are different names for the P54 RNA helicase. Abbreviations: H. sapiens (Homo sapiens), D. rerio (Danio rerio), C. elegans (Caenorhabditis elegans), D. melanogaster (Drosophila melanogaster), O. latipes (Oryzias latipes or medaka fish), X. laevis (Xenopus laevis), M. musculus (Mus musculus).