| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15597905 |
| Locus Tag | PA2709 |
| Description | cysteine synthase A |
| Strain | Pseudomonas mendocina NK-01 |
| GI | 330503978 |
| Locus Tag | MDS_3064 |
| Description | cysteine synthase |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83645402 |
| Locus Tag | HCH_02622 |
| Description | cysteine synthase A |