Figure 4.
Correlation between number of tRNA genes and codon usage in Tritryps. Panels A-C show the correspondence between codon usage and the number of tRNA genes for each isoacceptor (45 types), for the three species (see Table 1). Panels D-F show the correlation between codon usage and the number of tRNA genes per amino acid. Correlation coefficients were evaluated by performing a Spearman test. rs values are indicated in each panel; p < 0.0001 for panels A, B, D and E; p < 0.02 for panel C; p < 0.0001 for panel F.