| Strain | Pseudomonas aeruginosa B136-33 |
| GI | 478481051 |
| Locus Tag | G655_24340 |
| Description | putative xanthine dehydrogenase accessory factor X |
| Strain | Pseudomonas stutzeri RCH2 |
| GI | 431928533 |
| Locus Tag | Psest_3448 |
| Description | xanthine and CO dehydrogenases maturation factor, XdhC/CoxF family |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83644438 |
| Locus Tag | HCH_01591 |
| Description | CO dehydrogenase maturation factor |