TABLE 3.

Effect of hisO1242 and hisR10107 mutations on his-lac expression at 37°C in the presence or absence of the dnaA747 allele^a

Relevant genotype	β-Galactosidase activity (Miller units)
	dnaA+	dnaA747
hisO+ hisR+	110	994
hisO1242 hisR+	4,670	3,898
hisO+ hisR10107	84	1,011

^aAll strains used (MA4527, MA4526, MA4765, MA4764, MA4529, and MA4528) carry the hisC9968::MudJ fusion (see Table 1). Cells were grown and processed for the determination of β-galactosidase activity as described in the footnote to Table 2.