| Strain | Pseudomonas aeruginosa UCBPP-PA14 |
| GI | 116052463 |
| Locus Tag | PA14_57560 |
| Description | cytochrome b |
| Strain | Pseudomonas putida NBRC 14164 |
| GI | 512683885 |
| Locus Tag | PP4_08280 |
| 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 |