| B7UV38 | MTNB_PSEA8 | Pseudomonas aeruginosa (strain LESB58) | mtnB PLES_36441 | Detail |
| P10390 | NIFB_KLEPN | Klebsiella pneumoniae | nifB | Detail |
| D5VRM1 | NIFB_METIM | Methanocaldococcus infernus (strain DSM 11812 / JCM 15783 / ME) | nifB Metin_0554 | Detail |
| C5GGA4 | MTNB_AJEDR | Ajellomyces dermatitidis (strain ER-3 / ATCC MYA-2586) (Blastomyces dermatitidis) | MDE1 BDCG_03310 | Detail |
| Q0VPK5 | MTNB_ALCBS | Alcanivorax borkumensis (strain ATCC 700651 / DSM 11573 / NCIMB 13689 / SK2) | mtnB ABO_1445 | Detail |
| Q8KC85 | NIFB_CHLTE | Chlorobaculum tepidum (strain ATCC 49652 / DSM 12025 / NBRC 103806 / TLS) (Chlorobium tepidum) | nifB CT1540 | Detail |
| P09824 | NIFB_RHIME | Rhizobium meliloti (strain 1021) (Ensifer meliloti) (Sinorhizobium meliloti) | nifB RA0442 SMa0814 | Detail |
| Q16NX0 | MTNB_AEDAE | Aedes aegypti (Yellowfever mosquito) (Culex aegypti) | AAEL011830 | Detail |
| C0NN25 | MTNB_AJECG | Ajellomyces capsulatus (strain G186AR / H82 / ATCC MYA-2454 / RMSCC 2432) (Darling's disease fungus) (Histoplasma capsulatum) | MDE1 HCBG_04152 | Detail |
| C4KZ52 | MTNB_EXISA | Exiguobacterium sp. (strain ATCC BAA-1283 / AT1b) | mtnB EAT1b_1438 | Detail |