| P0A8Q0 | n/a | 1kf6 | CE1 | O | 813 | e1kf6O1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Fumarate_red_C |
| P0A8Q0 | n/a | 1kfy | CE1 | O | 811 | e1kfyO1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Fumarate_red_C |
| P0A8Q0 | n/a | 1l0v | CE1 | O | 812 | e1l0vO1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Fumarate_red_C |