Molecular cloning and characterization of Escherichia coli K12 ygjG gene

BMC Microbiology

Table 1 Expression of the lacZ fusions under different growth conditions

	β-Galactosidase activity, MU^b
Plasmid^a	LB^c	M9, Nitrogen Sufficient^c	M9, Nitrogen Limited^c
pBR-σ⁵⁴-lacZ-1	190	3,500	22,500
pBR-σ⁵⁴-lacZ-2	140	400	800
pBR-lacZ-3	110	130	170

^a Plasmids were transformed into E. coli TG1 strain. ^b In Miller units [24]. ^c For growth conditions and β-galactosidase assay see Materials and Methods.

ISSN: 1471-2180