| Species | RefIntense Num | Refseq Num | Source |
|---|---|---|---|
| Sinorhizobium fredii | 1 | 20 | HMP |
| Sinorhizobium medicae | 1 | 51 | HMP |
| Sinorhizobium meliloti | 1 | 241 | HMP |
| Slackia exigua | 2 | 4 | HMP/MGYG |
| Slackia heliotrinireducens | 1 | 2 | HMP |
| Slackia piriformis | 1 | 2 | MGYG |
| Sodalis glossinidius | 1 | 2 | HMP |
| Solobacterium moorei | 1 | 4 | MGYG |
| Sorangium cellulosum | 1 | 6 | HMP |
| Sphingobacterium spiritivorum | 2 | 7 | HMP |