| Q1QRX1 | HIS4_NITHX | Nitrobacter hamburgensis (strain DSM 10229 / NCIMB 13809 / X14) | hisA Nham_0125 | Detail |
| Q2KE60 | HIS4_RHIEC | Rhizobium etli (strain CFN 42 / ATCC 51251) | hisA RHE_CH00043 | Detail |
| P50936 | HIS4_RHOS4 | Rhodobacter sphaeroides (strain ATCC 17023 / 2.4.1 / NCIB 8253 / DSM 158) | hisA RHOS4_08300 RSP_2243 | Detail |
| Q1RJV5 | Y278_RICBR | Rickettsia bellii (strain RML369-C) | RBE_0278 | Detail |
| Q92IL8 | Y402_RICCN | Rickettsia conorii (strain ATCC VR-613 / Malish 7) | RC0402 | Detail |
| P0AAV8 | YBHH_ECOLI | Escherichia coli (strain K12) | ybhH b0769 JW0752 | Detail |
| P0CC06 | Y4701_DICDI | Dictyostelium discoideum (Slime mold) | DDB_G0284701 | Detail |
| B8EM86 | HIS4_METSB | Methylocella silvestris (strain DSM 15510 / CIP 108128 / LMG 27833 / NCIMB 13906 / BL2) | hisA Msil_2551 | Detail |
| A5FFX7 | HIS4_FLAJ1 | Flavobacterium johnsoniae (strain ATCC 17061 / DSM 2064 / UW101) (Cytophaga johnsonae) | hisA Fjoh_2873 | Detail |
| C0QWR6 | HIS4_BRAHW | Brachyspira hyodysenteriae (strain ATCC 49526 / WA1) | hisA BHWA1_02263 | Detail |