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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Similar rates of protein adaptation in Drosophila miranda and D. melanogaster, two species with different current effective population sizes

Figure 2

An excess of rare polymorphisms and reduced codon bias in fast evolving protein-coding genes. A. Tajima's D, a measure of the frequency distributions of mutations, is plotted against the rate of amino-acid evolution (Ka) at X-linked loci in D. miranda. B. The frequency of optimal codons (Fop) is plotted against the rate of amino-acid evolution (Ka).

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