oxidoreductase activity, acting on the aldehyde or oxo group of donors formylmethanofuran dehydrogenase activity https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:FORMYLMETHANOFURAN-DEHYDROGENASE-RXN formylmethanofuran:acceptor oxidoreductase activity Catalysis of the reaction: N-formylmethanofuran + A + H2O + H+ = AH(2) + CO2 + methanofuran. GO:0018493 EC:1.2.7.12 RHEA:19841 UM-BBD_reactionID:r0345 KEGG_REACTION:R03015 formylmethanofuran:(acceptor) oxidoreductase activity molecular_function