| Strain | Pseudomonas aeruginosa DK2 |
| GI | 392986285 |
| Locus Tag | PADK2_24535 |
| Description | xanthine dehydrogenase accessory factor X |
| Strain | Pseudomonas protegens CHA0 |
| GI | 501679282 |
| Locus Tag | PFLCHA0_c18220 |
| Description | XdhC/CoxI family protein |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83644438 |
| Locus Tag | HCH_01591 |
| Description | CO dehydrogenase maturation factor |