GO:0009055

Rubrerythrin (NCBI)
ferredoxin (NCBI)
heterosulfide reductase, subunit C1 (NCBI)
ferredoxin (NCBI)
Succinate dehydrogenase/fumarate reductase iron-sulfur subunit // Methanosarcina type heterodisulfide reductase subunit D (NCBI)
heterodisulfide reductase, subunit A (NCBI)
Fumarate reductase, iron-sulfur protein
Rubredoxin-oxygen oxidoreductase
Rubredoxin
Cytochrome c3