| B5EF56 | CYSD_GEOBB | Geobacter bemidjiensis (strain Bem / ATCC BAA-1014 / DSM 16622) | cysD Gbem_2353 | Detail |
| Q0HFM4 | CYSD_SHESM | Shewanella sp. (strain MR-4) | cysD Shewmr4_3072 | Detail |
| A8H0A3 | CYSD_SHEPA | Shewanella pealeana (strain ATCC 700345 / ANG-SQ1) | cysD Spea_0663 | Detail |
| B2TZH9 | CYSD_SHIB3 | Shigella boydii serotype 18 (strain CDC 3083-94 / BS512) | cysD SbBS512_E3122 | Detail |
| Q31XB4 | CYSD_SHIBS | Shigella boydii serotype 4 (strain Sb227) | cysD SBO_2768 | Detail |
| P57498 | CYSN_BUCAI | Buchnera aphidicola subsp. Acyrthosiphon pisum (strain APS) (Acyrthosiphon pisum symbiotic bacterium) | cysN BU423 | Detail |
| B7UHH0 | CYSN_ECO27 | Escherichia coli O127:H6 (strain E2348/69 / EPEC) | cysN E2348C_3021 | Detail |
| B7LXG3 | CYSN_ECO8A | Escherichia coli O8 (strain IAI1) | cysN ECIAI1_2853 | Detail |
| B1LQ72 | CYSN_ECOSM | Escherichia coli (strain SMS-3-5 / SECEC) | cysN EcSMS35_2877 | Detail |
| B2VG01 | CYSN_ERWT9 | Erwinia tasmaniensis (strain DSM 17950 / CIP 109463 / Et1/99) | cysN ETA_27050 | Detail |