Additional File 2.

a) Dependence of fraction of composite (fused) genes on fraction of component (un-fused) genes, as a ratio of unique instances over total number of genes, per genome. b) Distribution of fraction of distinct interacting proteins in the three domains of life (color coding as in Figure 3) and all domains (grey).

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Kamburov et al. BMC Genomics 2007 8:460   doi:10.1186/1471-2164-8-460