TABLE 2.

Quantification of inducible negative selection among streptococci

Species	Strain	Fst-sm(A7S)			Fst-sm(A7T)			ParE(RBS)			ParE(S56G)
		CFU/mL		Ratio	CFU/mL		Ratio	CFU/ml		Ratio	CFU/mL		Ratio
		–Xyl	+Xyl		–Xyl	+Xyl		–Xyl	+Xyl		–Xyl	+Xyl
S. mutans	UA140	4.3 × 108	1.2 × 104	≥104	3.4 × 108	1.5 × 104	≥104	6.4 × 108	5.2 × 108	<2	7.0 × 108	6.5 × 108	<2
	CL1	4.3 × 108	8.0 × 104	≥103	3.6 × 108	3.0 × 104	≥104	2.3 × 106	6.0 × 103	≥102	5.6 × 108	5.0 × 104	≥104
	JF243	7.8 × 108	7.0 × 104	≥104	7.5 × 108	6.0 × 104	≥104	4.8 × 108	4.5 × 108	<2	7.6 × 108	1.0 × 105	≥103
S. gordonii	DL1	5.8 × 108	4.8 × 108	<2	7.5 × 108	6.0 × 105	≥103	6.6 × 108	8.0 × 108	<1	8.8 × 108	6.5 × 108	<2
S. sanguinis	SK36	4.5 × 108	9.0 × 106	>10	8.0 × 108	7.0 × 105	≥103	7.6 × 108	5.0 × 105	≥104	6.8 × 108	7.2 × 108	<1