TABLE 5.

Miller assay results obtained with chromosomal sepL′ and espA′ translational fusions to lacZ in EHEC O157 ZAP1193

Promoter source	Avg no. of Miller units (± SD, n = 3) for indicated chromosomally integrated translational β-galactosidase fusions in ZAP1193a
	sepL::lacZ	espA::lacZ
ZAP1	50 ± 2	3 ± 2
ZAP21	50 ± 3	4 ± 2
ZAP41	49 ± 1	2 ± 1
ZAP46	49 ± 2	2 ± 1
ZAP58	47 ± 2	4 ± 1
ZAP193	NDb	2 ± 1
No promoter	2 ± 1	2 ± 1

^aStrains were grown in MEM-HEPES to an OD₆₀₀ of 0.6, and Miller assays were carried out as described in Materials and Methods.

^bND, not determined for this construct.