| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15596499 |
| Locus Tag | PA1302 |
| Description | probable heme utilization protein precursor |
| Strain | Pseudomonas protegens Pf-5 |
| GI | 70728751 |
| Locus Tag | PFL_1371 |
| Description | TonB-dependent outermembrane heme receptor |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83644167 |
| Locus Tag | HCH_01310 |
| Description | Fe transport outer membrane receptor protein |