| Q10XB0 | CPXS3_TRIEI | Trichodesmium erythraeum (strain IMS101) | cpcS3 Tery_4106 | Detail |
| P24427 | NIFB_RHILT | Rhizobium leguminosarum bv. trifolii | nifB | Detail |
| A4Y1I2 | HUTU_SHEPC | Shewanella putrefaciens (strain CN-32 / ATCC BAA-453) | hutU Sputcn32_0079 | Detail |
| B4SZJ3 | HUTU_SALNS | Salmonella newport (strain SL254) | hutU SNSL254_A0854 | Detail |
| Q46915 | GUDX_ECOLI | Escherichia coli (strain K12) | gudX ygcY b2788 JW2759 | Detail |
| B7V3J3 | HUTU_PSEA8 | Pseudomonas aeruginosa (strain LESB58) | hutU PLES_54901 | Detail |
| P38790 | HTD2_YEAST | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast) | HTD2 RMD12 YHR067W | 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 |