The function of these proteins is unknown. They may possibly be involved in the formation of formate dehydrogenase.

1: Identification and expression of the Escherichia coli fdhD and fdhE genes, which are involved in the formation of respiratory formate dehydrogenase. Schlindwein C, Giordano G, Santini CL, Mandrand MA; J Bacteriol 1990;172:6112-6121. PMID:2170340

2: Genetic evidence that genes fdhD and fdhE do not control synthesis of formate dehydrogenase-N in Escherichia coli K-12. Stewart V, Lin JT, Berg BL; J Bacteriol 1991;173:4417-4423. PMID:1648557