Table 2.

Divergence among E. coli, Salmonella, Sodalis, and SZPE homologs

	Synonymous substitutions per site, Ks
	invA	invB	invC	spaQ	fusA	rplB
SZPE–S. glossinidius	0.57	0.70	0.87	0.58	0.19	0.13
SZPE–S. enterica	>2	>2	>2	>2	0.66	0.57
S. glossinidius–S. enterica	>2	>2	>2	>2	0.70	0.61
S. enterica–E. coli	—	—	—	—	0.19	0.11
	Nonsynonymous substitutions per site, Ka
	invA	invB	invC	spaQ	fusA	rplB
SZPE–S. glossinidius	0.04	0.09	0.21	0.04	0.002	0.002
SZPE–S. enterica	0.53	0.90	0.46	0.24	0.070	0.047
S. glossinidius–S. enterica	0.53	0.90	0.42	0.23	0.065	0.042
S. enterica–E. coli	—	—	—	—	0.017	0.003