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. 2014 Jun 19;15(1):500. doi: 10.1186/1471-2164-15-500

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© Österman et al.; licensee BioMed Central Ltd. 2014

This article is published under license to 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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Illustration of d _N / d _S of the symbiosis genes of the two N. galegae strains. The HAMBI 540^T symbiosis gene region used as model sequence. The blue bars represent the rate of synonymous substitutions d _S, and the magenta-coloured bars the rate of nonsynonymous substitutions d _N. The numbers on top of the bars are the d _N/d _S ratios.