TABLE 2.

β-Galactosidase activity of the citBp21-lacZ fusion in minimal medium^a

Strain	Relevant genotype	β-Galactosidase activity (Miller units)
AF21	wild type	0.8
CJB9	ccpC	31
HKB94	abrB	0.5
HKB95	codY	1.4
HKB96	abrB codY	0.4
HKB97	ccpC abrB	19
HKB98	ccpC codY	29
HKB99	ccpC abrB codY	17

^aStrains were grown in TSS minimal medium containing 0.5% glucose and 0.2% glutamine as the carbon and nitrogen sources. Each value is the average of at least two determinations that varied by less than 20%.