Reduction of nitrite to nitric oxide catalyzed by xanthine oxidoreductase.
From the nature.com
Xanthine oxidoreductase catalyses the reduction of nitrates and nitrite to nitric oxide under hypoxic conditions.
From the nature.com
When bound in the active site of an oxidoreductase, the nicotinamide ring of the coenzyme is positioned so that it can accept a hydride from the other substrate.