| B4RJN2 | HIS3_NEIG2 | Neisseria gonorrhoeae (strain NCCP11945) | hisI NGK_0342 | Detail |
| P58853 | HIS2_PYRFU | Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1) | hisI hisIE PF1664 | Detail |
| A1V8H6 | HIS3_BURMS | Burkholderia mallei (strain SAVP1) | hisI BMASAVP1_A3246 | Detail |
| Q1MGA3 | HIS3_RHIL3 | Rhizobium leguminosarum bv. viciae (strain 3841) | hisI RL2532 | Detail |
| Q47QS0 | HIS3_THEFY | Thermobifida fusca (strain YX) | hisI Tfu_1159 | Detail |
| Q3SEU9 | HIS3_THIDA | Thiobacillus denitrificans (strain ATCC 25259) | hisI Tbd_1707 | Detail |
| Q0BWU4 | HIS3_HYPNA | Hyphomonas neptunium (strain ATCC 15444) | hisI HNE_3376 | Detail |
| Q603K4 | HIS3_METCA | Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath) | hisI MCA2801 | Detail |
| P60543 | HIS3_MYCPA | Mycolicibacterium paratuberculosis (strain ATCC BAA-968 / K-10) (Mycobacterium paratuberculosis) | hisI hisI2 MAP_1300 | Detail |
| P83222 | NUC34_STRAT | Streptomyces antibioticus | | Detail |