Reaction catalyzed by nitrite reductase [NAD(P)H] (1.7.1.4), nitrite reductase (cytochrome; ammonia-forming) (1.7.2.2)
+
=
NH3
+
+
H2O
nitrite
+
reduced methyl viologen
=
NH3
+
oxidized methyl viologen
+
H2O
