Nitric oxide reductase (menaquinol)

Nitric oxide reductase (menaquinol) is an enzyme. This enzyme catalyses the following chemical reaction


 * 2 nitric oxide + menaquinol $$\rightleftharpoons$$ nitrous oxide + menaquinone + H2O

Nitric oxide reductase contains copper.

In 2015 the laboratory that had characterized the Bacillus azotoformans enzyme wrote, "The copper-A-dependent Nor from Bacillus azotoformans uses cytochrome c551 as electron donor but lacks menaquinol activity, in contrast to our earlier report."