| P00165 | n/a | 6rqf | 6PL | E | 101 | e6rqfA1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | n/a | 6rqf | 6PL | I | 307 | e6rqfA1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | n/a | 6rqf | 6PL | I | 307 | e6rqfI1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | n/a | 6rqf | 6PL | N | 101 | e6rqfI1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |