| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15595511 |
| Locus Tag | PA0314 |
| Description | L-cysteine transporter of ABC system FliY |
| Strain | Pseudomonas putida H8234 |
| GI | 512576284 |
| Locus Tag | L483_00870 |
| Description | cystine transporter subunit |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83646475 |
| Locus Tag | HCH_03752 |
| Description | cystine transporter subunit |