Reaction catalyzed by formaldehyde ferredoxin oxidoreductase (1.2.7.B2), aldehyde ferredoxin oxidoreductase (1.2.7.5)
+
H2O
+
=
+
+
propionaldehyde
+
H2O
+
oxidized benzyl viologen
=
propionate
+
H+
+
reduced benzyl viologen