| P0AC44 | n/a | 2wdr | PCI | C | 1131 | e2wdrD1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Sdh_cyt |
| P0AC44 | n/a | 2wdr | PCI | G | 1131 | e2wdrH1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Sdh_cyt |
| P0AC44 | n/a | 2wdr | PCI | K | 1131 | e2wdrL1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Fumarate reductase respiratory complex transmembrane subunits | Sdh_cyt |