| C6E0S2 | AROB_GEOSM | Geobacter sp. (strain M21) | aroB GM21_2660 | Detail |
| P24427 | NIFB_RHILT | Rhizobium leguminosarum bv. trifolii | nifB | Detail |
| A0A2P1GIY1 | HL4_CATRO | Catharanthus roseus (Madagascar periwinkle) (Vinca rosea) | HL4 | Detail |
| P10390 | NIFB_KLEPN | Klebsiella pneumoniae | nifB | Detail |
| D5VRM1 | NIFB_METIM | Methanocaldococcus infernus (strain DSM 11812 / JCM 15783 / ME) | nifB Metin_0554 | Detail |
| J9R1J8 | MTS1_SELML | Selaginella moellendorffii (Spikemoss) | SELMODRAFT_402353 | 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 |
| B6YU51 | DAPAL_THEON | Thermococcus onnurineus (strain NA1) | dapAL TON_0506 | Detail |
| O58577 | DAPAL_PYRHO | Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3) | dapAL PH0847 | Detail |