| A6VX53 | SYC_MARMS | Marinomonas sp. (strain MWYL1) | cysS Mmwyl1_2110 | Detail |
| Q660S3 | SYC_BORBP | Borreliella bavariensis (strain ATCC BAA-2496 / DSM 23469 / PBi) (Borrelia bavariensis) | cysS BG0612 | Detail |
| Q8YXW5 | SYC_NOSS1 | Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576) | cysS all1092 | Detail |
| Q80UG8 | TTLL4_MOUSE | Mus musculus (Mouse) | Ttll4 Kiaa0173 | Detail |
| Q74L26 | SYC_LACJO | Lactobacillus johnsonii (strain CNCM I-12250 / La1 / NCC 533) | cysS LJ_0400 | Detail |
| Q1QN87 | SYC_NITHX | Nitrobacter hamburgensis (strain DSM 10229 / NCIMB 13809 / X14) | cysS Nham_1488 | Detail |
| Q6YR75 | SYC_ONYPE | Onion yellows phytoplasma (strain OY-M) | cysS PAM_141 | Detail |
| Q7VX96 | SYC_BORPE | Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251) | cysS BP1908 | Detail |
| Q5ZZP6 | SYC_MYCH2 | Mycoplasma hyopneumoniae (strain 232) | cysS mhp661 | Detail |
| P55342 | BSHC_BACSU | Bacillus subtilis (strain 168) | bshC yllA BSU15120 | Detail |