Table 3.

Characteristics of each housekeeping gene.

Gene	Size (bp)	Average G+C content %	PS (%)a	π b	dN/dSc
pheS	438	56.2	2.51	0.0067	0.024
glyA	387	54.2	1.55	0.0026	0.008
fumC	411	52.2	2.68	0.0089	0.021
mdh	387	51.8	1.03	0.0042	0.015
sucA	429	57.7	2.80	0.0078	0.019
dnaA	405	51.4	2.22	0.0095	0.031
atpA	420	58.6	1.67	0.0037	0.007

^aPercent polymorphic sites (PS (%)).

^bNucleotide diversity (π).

^cAverage nonsynonymous substitutions versus synonymous substitutions (dN/dS).