| Q5ZIS0 | DB04657 | 2fbw | CBE | C | 202 | e2fbwD1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| Q5ZIS0 | DB04657 | 2fbw | CBE | P | 202 | e2fbwQ1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| Q5ZIS0 | DB04657 | 2wqy | CBE | C | 144 | e2wqyD3 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| Q5ZIS0 | DB04657 | 2wqy | CBE | P | 202 | e2wqyQ1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |