| P00163 | n/a | 3cx5 | 6PH | A | 4013 | e3cx5C2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00163 | n/a | 3cx5 | 6PH | L | 4113 | e3cx5N2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00163 | n/a | 3cxh | 6PH | E | 4013 | e3cxhC2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00163 | n/a | 3cxh | 6PH | L | 4113 | e3cxhN2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00163 | n/a | 6ymx | 6PH | C | 401 | e6ymxC1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00163 | n/a | 6ymx | 6PH | O | 401 | e6ymxN1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |