Table 5.

Results of Factorial Correspondence Analyses on Amino Acid Usage in Buchnera and in E. coli Orthologs

		Inertia	CAI_Eco	GC₁₂	GC₃	AT_s2	Gravy	Aromo
B-aps	z1	22.7	−0.43^**	−0.92^**	−0.01	0.13^*	0.08	0.70^**
	z2	14.6	−0.19^**	0.26^**	0.15^**	−0.76^**	0.74^**	0.29^**
B-sgr	z1	24.6	−0.39^**	−0.94^**	−0.18^**	0.08	0.11	0.71^**
	z2	15.1	−0.13^*	0.27^**	0.18^**	−0.78^**	0.76^**	0.29^**
B-bpi	z1	22.0	−0.46^**	−0.90^**	0.07	0.01	0.16^**	0.61^**
	z2	15.5	−0.16^**	0.13^*	−0.12	−0.78^**	0.72^**	0.45^**
E. coli	z1	21.8	−0.56^**	0.17^**	0.19^**	−0.19^**	0.06	0.38^**
	z2	13.4	−0.42^**	−0.05	0.30^**	−0.64^**	0.73^**	0.38^**

Additional parameters; gravy score (level of hydrophobicity) and aromo (level of aromaticity = % Phe + Tyr + Trp). Bold values are significant at the 0.05 level (^*) or at the 0.01 level (^**) after Bonferroni's correction for multiple tests (k = 6); Sokal and Rohlf (2003).

Mutational and Selective Pressures on Codon and Amino Acid Usage in Buchnera, Endosymbiotic Bacteria of Aphids