| P92507 | n/a | 3vr9 | FTN | C | 202 | e3vr9D1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| P92507 | n/a | 3vr9 | FTN | F | 304 | e3vr9H1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| P92507 | n/a | 3vrb | FTN | C | 202 | e3vrbD2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |
| P92507 | n/a | 3vrb | FTN | F | 304 | e3vrbH2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | CybS |