Table 1.

Expression of hupS_p in K. pneumoniae

Strain*	Genotype	β-Galactosidase, Miller units
		Anaerobic	Aerobic	Anaerobic (+pMJ220†)	Aerobic (+pMJ220)
UNF122	wild type	964	105	1,695	3,188
CK263	nifA	69	70	1,706	2,487
UNF2561	rpoN	24	16	13	17
UNF1789	ntrC	34		2,216	3,210
UNF1665	nifE	1,125

^*All strains contain plasmid pHL315 (hupSL–lacZ). 

^†pMJ220 expresses the KpNifA protein (35).