ssm:Spirs_2633 no KO assigned | (GenBank) FAD-dependent pyridine nucleotide-disulfide oxidoreductase ssm:Spirs_1144 no KO assigned | (GenBank) Aldehyde ferredoxin oxidoreductase ssm:Spirs_1145 no KO assigned | (GenBank) 4Fe-4S ferredoxin iron-sulfur binding domain protein