TABLE 3.

Enzyme activities in wild type and mutants grown under normoxic and hypoxic conditions^a

Strain	Sp act (nmol min−1 mg−1)
	AHAS		Transaminase B		GDH
	N	H	N	H	N	H
WT	40 ± 8	73 ± 10	14 ± 3	48 ± 6	23 ± 4	57 ± 12
DAHAS-L	<1	<1	11 ± 2	38 ± 5	20 ± 4	48 ± 11
DAHAS-S	30 ± 6	39 ± 7	15 ± 4	52 ± 4	26 ± 4	64 ± 11
DGDH	43 ± 9	73 ± 13	17 ± 4	56 ± 7	<0.1	<0.1

^aMycelia were incubated in MM medium for 12 h under normoxic (N) and hypoxic (H) conditions. Valine, leucine, and isoleucine (10 mM each) were added to the medium to preculture DAHAS-L. Data are means of results of three experiments ± standard errors.