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The Genom of Homo sapiens.pdf

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300 ROGOZIN ET AL.gene lossgene gain1000800600400200Correlation between the loss <strong>of</strong>genes and introns00 200 400 600 800 1000intron lossCorrelation between gain <strong>of</strong> genesand introns15000100005000such as vertebrates and plants, seem not to experience thisselective pressure and are much more tolerant to variousforms <strong>of</strong> apparently dispensable DNA, or even tend toexpand their genomes. Understanding the deeper biologicalreasons behind these lineage-specific evolutionarytrends is a fascinating task for the next generation <strong>of</strong> comparative-genomicstudies.ACKNOWLEDGMENTWe thank Roman Tatusov for his contribution to theconstruction <strong>of</strong> the KOGs.REFERENCESR=0.9300 500 1000 1500 2000-5000intron gainR=0.96Figure 5. Comparative dynamics <strong>of</strong> evoluton <strong>of</strong> gene repertoiresand gene structure. (Top) Gene (KOG) gain vs. intron gain. (Bottom)Gene (KOG) loss vs. intron loss. 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