| P00165 | DB06755 | 6rqf | BCR | H | 101 | e6rqfA1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | DB06755 | 6rqf | BCR | I | 305 | e6rqfI1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | DB06755 | 7qrm | BCR | F | 101 | e7qrmA1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | DB06755 | 7qrm | BCR | P | 101 | e7qrmI1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | DB06755 | 7zyv | BCR | F | 101 | e7zyvA1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00165 | DB06755 | 7zyv | BCR | P | 101 | e7zyvI1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |