TABLE 2.

Specific growth rates of S. bulderi as a function of culture pH^a

Substrate	pH	Growth rate (h−1)
Glucose	6.0	0.24
	3.0	0.24
δ-Gluconolactone	5.0	<0.01
	2.7	0.22
Sodium gluconate	5.0	<0.01
	3.0	0.22

^aInitial pH in shake flask cultures. Data were calculated from two independent experiments, and duplicate experiments varied less than 5%.