| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15599009 |
| Locus Tag | PA3814 |
| Description | L-cysteine desulfurase (pyridoxal phosphate-dependent) |
| Strain | Pseudomonas putida BIRD-1 |
| GI | 386010505 |
| Locus Tag | PPUBIRD1_0893 |
| Description | IscS |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83647155 |
| Locus Tag | HCH_04461 |
| Description | cysteine sulfinate desulfinase/cysteine desulfurase |