Table 1.

Antioxidant enzyme levels in BPAEC

Enzyme	Cells incubated with different concentrations of CO, nM
	0	11	110
Glutathione peroxidase	40.3  ± 5.0	38.8  ± 5.0	36.0  ± 5.2
(M NADPH per min per mg protein)	(n  = 4)	(n  = 4)	(n  = 3)
Glucose-6-phosphate deH2ase	10.4  ± 1.8	7.9  ± 1.1	10.0  ± 4.0
(M NADPH per min per mg protein)	(n  = 6)	(n  = 4)	(n  = 4)
Catalase	31.5  ± 2.1	n.d.	39.4  ± 7.0
(mM H2O2 per min per mg protein)	(n  = 4)	n.d.	(n  = 4)
MnSOD	18.0  ± 3.2	50.2  ± 3.3*	65.9  ± 11.0*
(units/mg protein)	(n  = 8)	(n  = 6)	(n  = 6)
HO-1	1.1  ± 0.1	1.6  ± 0.3	3.9  ± 0.2*
(M bilirubin per min per mg protein)	(n  = 8)	(n  = 8)	(n  = 15)

Values shown are means ± SEM. *, P < 0.05.