TABLE 2.

Effects of the cya and crp mutations on gntT::lacZ expression

E. coli strain	Relevant genotype	β-Galactosidase activity (U) with indicated carbon source
		None		Gluconate		Glucose
		−cAMP	+cAMPa	−cAMP	+cAMP	−cAMP	+cAMP
NP100	Wild type	10	10	460	680	0	0
RH112	crp	20	15	105	70	0	0
HT110	cya	30	25	115	620	0	0
RH114	crp cya	0	10	90	60	0	0
RH216	crp gntR	50	60	45	35	50	55
HT216	cya gntR	75	585	55	380	60	290

^aAdded to a final concentration of 5 mM.