Table 4.

Percentage of NO₃⁻ and NO₂⁻ obtained from peroxynitrite isomerization at pH 7.0 and at 22.0 °C ^a.

Dr-Nb(III)	Apo-Dr-Nb	CO2	NO3−	NO2−
(M)	(M)	(M)	(%)	(%)
0.0	0.0	0.0	73 ± 8	28 ± 3
0.0	0.0	1.2 × 10−3	69 ± 7	30 ± 3
0.0	3.5 × 10−5	0.0	71 ± 8	29 ± 3
0.0	3.5 × 10−5	1.2 × 10−3	74 ± 7	25 ± 2
3.5 × 10−5	0.0	0.0	89 ± 9	12 ± 2
3.5 × 10−5	0.0	1.2 × 10−3	93 ± 8	7 ± 1
3.5 × 10−5	3.5 × 10−5	0.0	91 ± 9	10 ± 1
3.5 × 10−5	3.5 × 10−5	1.2 × 10−3	92 ± 9	8 ± 1

^a The peroxynitrite concentration was 2.0 × 10⁻⁴ M; 5.0 × 10⁻² M Bis-Tris propane buffer.