| Q5KVC9 | HIS4_GEOKA | Geobacillus kaustophilus (strain HTA426) | hisA GK3072 | Detail |
| Q5P794 | HIS4_AROAE | Aromatoleum aromaticum (strain EbN1) (Azoarcus sp. (strain EbN1)) | hisA AZOSEA06940 ebA1293 | Detail |
| Q8R884 | HIS4_CALS4 | Caldanaerobacter subterraneus subsp. tengcongensis (strain DSM 15242 / JCM 11007 / NBRC 100824 / MB4) (Thermoanaerobacter tengcongensis) | hisA TTE2134 | Detail |
| A5UGY5 | HIS4_HAEIG | Haemophilus influenzae (strain PittGG) | hisA CGSHiGG_05610 | Detail |
| Q3AD49 | HIS4_CARHZ | Carboxydothermus hydrogenoformans (strain ATCC BAA-161 / DSM 6008 / Z-2901) | hisA CHY_1089 | Detail |
| A8FNR3 | HIS4_CAMJ8 | Campylobacter jejuni subsp. jejuni serotype O:6 (strain 81116 / NCTC 11828) | hisA C8J_1503 | Detail |
| Q8PLG7 | HIS4_XANAC | Xanthomonas axonopodis pv. citri (strain 306) | hisA XAC1833 | Detail |
| A7FU80 | HIS4_CLOB1 | Clostridium botulinum (strain ATCC 19397 / Type A) | hisA CLB_1590 | Detail |
| B2I0N7 | HIS4_ACIBC | Acinetobacter baumannii (strain ACICU) | hisA ACICU_03434 | Detail |
| B9MDV7 | HIS4_ACIET | Acidovorax ebreus (strain TPSY) (Diaphorobacter sp. (strain TPSY)) | hisA Dtpsy_0732 | Detail |