TABLE 2.

Denitrification activities in P. pantotrophus wild type and narR mutant

Prepn	Activity (U nmol min−1 mg of protein−1) in:
	P. pantotrophus wild type	P. pantotrophus narR::Ω
Intact cells
Nitrate reduction	85	10
Nitrate reduction + 0.02% Triton X-100	95	10
Nitrite reduction	370	330
Nitric oxide reduction	2,400	1,900
Total-cell extract
Nitrate reductase	390	100
Chlorate reductase	1,500	180