| P00157 | n/a | 4d6u | G8U | C | 503 | e4d6uC2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 4d6u | G8U | P | 503 | e4d6uP2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 6fo0 | G8U | C | 503 | e6fo0C2 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |
| P00157 | n/a | 6fo0 | G8U | P | 503 | e6fo0P1 | Transmembrane heme-binding four-helical bundle | Transmembrane heme-binding four-helical bundle | Transmembrane di-heme cytochromes | Cytochrome_B |