| B3WED0 | HIS3_LACCB | Lactobacillus casei (strain BL23) | hisI LCABL_16500 | Detail |
| Q8A7Z7 | HIS2_BACTN | Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / NCTC 10582 / E50 / VPI-5482) | hisI hisIE BT_1377 | Detail |
| A0LCF4 | HIS3_MAGMM | Magnetococcus marinus (strain ATCC BAA-1437 / JCM 17883 / MC-1) | hisI Mmc1_3157 | Detail |
| Q3A2Z2 | HIS3_PELCD | Pelobacter carbinolicus (strain DSM 2380 / NBRC 103641 / GraBd1) | hisI Pcar_2024 | Detail |
| A1A1I6 | HIS3_BIFAA | Bifidobacterium adolescentis (strain ATCC 15703 / DSM 20083 / NCTC 11814 / E194a) | hisI BAD_0788 | Detail |
| Q8BL86 | MBLC2_MOUSE | Mus musculus (Mouse) | Mblac2 | Detail |
| Q6G9W6 | LYTN_STAAS | Staphylococcus aureus (strain MSSA476) | lytN SAS1181 | Detail |
| Q0SHY8 | HIS3_RHOJR | Rhodococcus jostii (strain RHA1) | hisI RHA1_ro01021 | Detail |
| Q166D6 | HIS3_ROSDO | Roseobacter denitrificans (strain ATCC 33942 / OCh 114) (Erythrobacter sp. (strain OCh 114)) (Roseobacter denitrificans) | hisI RD1_2607 | Detail |
| A1VHE5 | HIS3_DESVV | Desulfovibrio vulgaris subsp. vulgaris (strain DP4) | hisI Dvul_2850 | Detail |