| Q6GDD2 | HIS2_STAAR | Staphylococcus aureus (strain MRSA252) | hisI hisIE SAR2754 | Detail |
| Q9RPQ3 | HIS2_THEP3 | Thermoanaerobacter pseudethanolicus (strain ATCC 33223 / 39E) (Clostridium thermohydrosulfuricum) | hisI hisIE | Detail |
| Q9KSW7 | HIS2_VIBCH | Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961) | hisI hisIE VC_1139 | Detail |
| B9JFG9 | HIS3_AGRRK | Agrobacterium radiobacter (strain K84 / ATCC BAA-868) | hisI Arad_2477 | Detail |
| Q9ZNI1 | LYTN_STAA8 | Staphylococcus aureus (strain NCTC 8325) | lytN SAOUHSC_01219 | Detail |
| Q5U925 | HADI_CLODI | Clostridioides difficile (Peptoclostridium difficile) | hadI fldI_1 lcdC BN1095_530010 BN1096_180047 BN1097_160049 CD630DERM_03960 ERS445050_03311 PCZ31_0395 | Detail |
| Q8PVE6 | HIS3_METMA | Methanosarcina mazei (strain ATCC BAA-159 / DSM 3647 / Goe1 / Go1 / JCM 11833 / OCM 88) (Methanosarcina frisia) | hisI MM_2019 | Detail |
| P62391 | HIS3_METMP | Methanococcus maripaludis (strain S2 / LL) | hisI MMP0280 | Detail |
| A5UMF9 | HIS3_METS3 | Methanobrevibacter smithii (strain ATCC 35061 / DSM 861 / OCM 144 / PS) | hisI Msm_1182 | Detail |
| A0B8B3 | HIS3_METTP | Methanothrix thermoacetophila (strain DSM 6194 / JCM 14653 / NBRC 101360 / PT) (Methanosaeta thermophila) | hisI Mthe_1155 | Detail |