Correlation between tRNA genes content and translational requirements. Selected genomes with variable translational requirements are taken into account: Sulcia muelleri CARI (1), Buchnera aphidicola BCc (2), Moranella endobia PCVAL (white), Riesia pediculicola (3), Blatabacterium sp. Bge (4), Blochmania floridanus (5), Baumania cicadicolla (6), Hamiltonella defensa (7), Sodalis glossinidius (8), Yersinia enterocolitica subsp. Enterocolitica 8081 (9), Escherichia coli str. K-12 MG1655 (10), Dickeya dadantii Ech586 (11), and Serratia sp. AS9 (12). A high correlation between both parameters was observed when every genome except M. endobia were included (R2 = 0.94), as well as when only endosymbionts except M. endobia were considered (R2 = 0.77). Inclusion of M. endobia among endosymbionts caused a drastic diminution of the coefficient (R2 = 0.33).