| A6URR6 | HIS3_METVS | Methanococcus vannielii (strain ATCC 35089 / DSM 1224 / JCM 13029 / OCM 148 / SB) | hisI Mevan_1291 | Detail |
| A9WR59 | HIS3_RENSM | Renibacterium salmoninarum (strain ATCC 33209 / DSM 20767 / JCM 11484 / NBRC 15589 / NCIMB 2235) | hisI RSal33209_2338 | Detail |
| Q92QB5 | HIS3_RHIME | Rhizobium meliloti (strain 1021) (Ensifer meliloti) (Sinorhizobium meliloti) | hisI R01419 SMc01004 | Detail |
| B3QE24 | HIS3_RHOPT | Rhodopseudomonas palustris (strain TIE-1) | hisI Rpal_3871 | Detail |
| B3EM52 | HIS3_CHLPB | Chlorobium phaeobacteroides (strain BS1) | hisI Cphamn1_0466 | Detail |
| C1FN43 | HIS3_CLOBJ | Clostridium botulinum (strain Kyoto / Type A2) | hisI CLM_1814 | Detail |
| Q8FP00 | HIS3_COREF | Corynebacterium efficiens (strain DSM 44549 / YS-314 / AJ 12310 / JCM 11189 / NBRC 100395) | hisI CE1993 | Detail |
| Q31J60 | HIS3_HYDCU | Hydrogenovibrio crunogenus (strain XCL-2) (Thiomicrospira crunogena) | hisI Tcr_0217 | Detail |
| A6UT21 | HIS3_META3 | Methanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 / Nankai-3) | hisI Maeo_0051 | Detail |
| Q8TS96 | HIS3_METAC | Methanosarcina acetivorans (strain ATCC 35395 / DSM 2834 / JCM 12185 / C2A) | hisI MA_0908 | Detail |