TABLE 1.

Growth rates of B. subtilis ccpA mutant strains expressing the ilv-leu operon from its own or a xylose-inducible promoter^a

Strain (genotype)	Amino acid addition(s)	Generation time (min)b
QB5407 (ccpA)	None	155 ± 7
	CAA	55 ± 1
	Xylose	156 ± 12
	Met + xylose	109 ± 1
GP325 (ccpA PxylA::ilv-leu)	Met	NGc
	Met + CAA	55 ± 5
	Met + xylose	47 ± 1
	Xylose	68 ± 0

^aCells were grown at 37°C under vigorous agitation in CE-Glc minimal medium supplemented with caseine hydrolysate (CAA) (0.1% wt/vol), methionine (met) (0.002% wt/vol), or xylose (1.5% wt/vol) as indicated. The growth was monitored by measuring the optical density at 600 nm.

^bThe generation times were determined from the growth of at least three independent cultures under each condition.

^cNG, no growth.