Figure 3
From: Quantification of codon selection for comparative bacterial genomics
Codon selection as a function of tRNA gene number in Enterobacteriaceae. All codon statistics were calculated using the Translation40 gene set to construct f o and the shared set of ORFs to construct f n . A. ACEχ2 calculated on all shared genes, for the set of 14 free-living bacteria (1060 genes; open circles, thick line) and a set of 4 endosymbionts along with 11 free-living bacteria (201 genes; filled circles, thin line). B. ACEχ2, like other statistics, calculated on Translation40 gene set.