| P00157 | n/a | 1pp9 | UQ | C | 2002 | e1pp9C2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 1pp9 | UQ | P | 3002 | e1pp9P2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 2a06 | UQ | C | 2002 | e2a06C2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 2a06 | UQ | P | 3002 | e2a06P2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |