10.1371/journal.pgen.1001284.g004 Todd J. Treangen Todd J. Treangen Eduardo P. C. Rocha Eduardo P. C. Rocha Gene expression differs according to gene origin. Public Library of Science 2011 differs 2011-01-27 00:59:11 Figure https://plos.figshare.com/articles/figure/_Gene_expression_differs_according_to_gene_origin_/473551 <p>Paralogs are more expressed, as measured by the codon adaptation index, than xenologs. Xenologs, however, are more expressed than the genes without paralogs and xenologs.</p>