Distribution of evolutionary rates for various strains overlaid on a phylogenetic tree using as reference for genome comparisons

<p><b>Copyright information:</b></p><p>Taken from "The impact of horizontal gene transfer in shaping operons and protein interaction networks – direct evidence of preferential attachment"</p><p>http://www.biomedcentral.com/1471-2148/8/23</p><p>BMC Evolutionary Biology 2008;8():23-23.</p><p>Published online 24 Jan 2008</p><p>PMCID:PMC2259305.</p><p></p> genes evolve slower than and genes (P-value < 0.001)