| Strain | Pseudomonas aeruginosa UCBPP-PA14 |
| GI | 116052463 |
| Locus Tag | PA14_57560 |
| Description | cytochrome b |
| Strain | Pseudomonas fluorescens F113 |
| GI | 378952697 |
| Locus Tag | PSF113_4801 |
| Description | Ubiquinol--cytochrome c reductase, cytochrome B subunit |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83648539 |
| Locus Tag | HCH_05899 |
| Description | cytochrome subunit B of the bc complex |