Table 2.

Results of Factorial Correspondence Analyses on Relative Codon Usage in Buchnera and in E. coli Orthologs

Inertia
CAIEco
GC12
CG3
ATs3
GCs3
B-aps z1 6.1 −0.11* −0.24** 0.06 0.63** −0.56**
z2 4.3 0.14** 0.16** 0.29** −0.07 0.01
B-sgr z1 7.9 −0.11* −0.21** 0.01 0.71** −0.54**
z2 3.8 0.14** 0.13* 0.09 0.11* −0.31**
B-bpi z1 22.9 −0.09 −0.17** 0.20** 0.82** −0.91**
z2 3.3 −0.05 −0.11 0.05 −0.08 −0.08
E. coli z1 24.0 −0.96** 0.10 0.01 0.19** 0.57**
z2
5.8
−0.05
0.10
−0.82**
0.09
−0.08

[i] For each of the first two axes of the FCA (z1 and z2), % of total inertia, and nonparametric (Spearman's) correlation coefficients between z-values and CAI-Eco (codon adaptive index of the E. coli ortholog), GC content, AT skew (ATs) and GC skew (GCs) indices indicating codon positions. Bold values are significant at the 0.05 level (*) or at the 0.01 level (**) after Bonferroni's correction for multiple tests (k = 5); Sokal and Rohlf (2003).