Formate dehydrogenase-N (, Fdh-N, FdnGHI, nitrate-inducible formate dehydrogenase, formate dehydrogenase N, FDH-N, nitrate inducible Fdn, nitrate inducible formate dehydrogenase) is an enzyme with systematic name formate:quinone oxidoreductase. This enzyme catalyses the following chemical reaction
This enzyme contains molybdopterin-guanine dinucleotides, five [4Fe-4S] clusters and two heme b groups.