| CDS description | CDS accession | Island | Host Description |
|---|
| heterodisulfide reductase subunit A | NC_000918:246792:268431 | NC_000918:246792 | Aquifex aeolicus VF5, complete genome |
| CoB--CoM heterodisulfide reductase subunit A | NC_014972:1510914:1530333 | NC_014972:1510914 | Desulfobulbus propionicus DSM 2032 chromosome, complete genome |
| CoB--CoM heterodisulfide reductase subunit A | NC_015416:2723189:2766018 | NC_015416:2723189 | Methanosaeta concilii GP-6 chromosome, complete genome |
| CoB--CoM heterodisulfide reductase subunit A | NC_010718:2860096:2866384 | NC_010718:2860096 | Natranaerobius thermophilus JW/NM-WN-LF, complete genome |
| Heterodisulfide reductase subunit A-like protein | NC_012883:1522920:1527945 | NC_012883:1522920 | Thermococcus sibiricus MM 739, complete genome |