TABLE 3.

Complementation of the mutation in class III mutants by various plasmids^a

Strain	Relevant genotype	Enzyme activity (nmol min−1 mg of cell protein−1)
		FHL				Nitrate reductase
		No plasmid	pAH2	pAH20	pAH6	No plasmid	pAH2	pAH20
BW545	Wild type	230	220	220	170	650	730	620
SE1581		<1	160	90	NDb	40	500	510
SE1588		<1	180	80	<1	40	610	450
AH30	moeB101-Km	<1	150	<1	135	40	600	40

^aCultures were grown in LBG medium for FHL activity and LBGN medium for nitrate reductase activity. 

^bND, not determined.