Figure 6.

Proportions of assigned functions among genes belonging to families and singletons in B. subtilis and E. coli K12. Gene functions were assigned according to the Cluster of Orthologous Genes (COGs) classification [41]. Extended gene families are considered, in which a gene belongs to a single family only (see Materials and methods).

Pushker et al. Genome Biology 2004 5:R27  
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