| CDS description | CDS accession | Island | Host Description |
|---|
| tungsten formylmethanofuran dehydrogenase subunit B FwdB | NC_013790:485468:495604 | NC_013790:485468 | Methanobrevibacter ruminantium M1 chromosome, complete genome |
| tungsten formylmethanofuran dehydrogenase subunit B | NC_015416:1478775:1481094 | NC_015416:1478775 | Methanosaeta concilii GP-6 chromosome, complete genome |
| tungsten formylmethanofuran dehydrogenase subunit B | NC_008553:1038344:1061922 | NC_008553:1038344 | Methanosaeta thermophila PT, complete genome |