| Strain | Pseudomonas aeruginosa PAO1 |
| GI | 15595510 |
| Locus Tag | PA0313 |
| Description | L-cysteine transporter of ABC system YecS |
| Strain | Pseudomonas protegens CHA0 |
| GI | 501677728 |
| Locus Tag | PFLCHA0_c02490 |
| Description | inner membrane amino-acid ABC transporter permease protein YecS |
| Strain | Hahella chejuensis KCTC 2396 |
| GI | 83646476 |
| Locus Tag | HCH_03754 |
| Description | amino acid ABC transporter permease |