Mutation and Selection Cause Codon Usage and Bias in Mitochondrial Genomes of Ribbon Worms (Nemertea)

• Haixia Chen ,

  * E-mail: chen_hai_xia@126.com (HXC); per.sundberg@bioenv.gu.se (PS)

  Affiliation Department of Biological and Environmental Sciences, University of Gothenburg, Sweden

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• Shichun Sun,

  Affiliation Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China

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• Jon L. Norenburg,

  Affiliation Department of Invertebrate Zoology, Smithsonian's National Museum of Natural History, Washington D.C., United States of America

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• Per Sundberg

  * E-mail: chen_hai_xia@126.com (HXC); per.sundberg@bioenv.gu.se (PS)

  Affiliation Department of Biological and Environmental Sciences, University of Gothenburg, Sweden

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