TABLE 5.

Effects of deletion of SR09 on Hap1 activity^a

Strains	β-Galactoside activity (Miller units) when grown in the presence of the indicated concentration of dpIX
	0 μg/ml	0.031 μg/ml	0.062 μg/ml	0.125 μg/ml	0.25 μg/ml	0.5 μg/ml	1.0 μg/ml
Wild type	0.6 ± 0.1	14 ± 2	38 ± 5	339 ± 100	625 ± 133	876 ± 102	1,266 ± 94
Δsro9	8.0 ± 0.4	35 ± 3	119 ± 8	437 ± 64	617 ± 130	755 ± 104	984 ± 40

^aYeast Δsro9 Δhem1 Hap1-expressing cells bearing the UAS1/CYC1-lacZ reporter were grown in the presence of the indicated concentrations of heme analogue dpIX. β-Galactosidase activities were detected, and data shown are averages (± standard deviations) of at least three independent transformants.