| P77875 | NIFK_HERSE | Herbaspirillum seropedicae | nifK | Detail |
| Q57118 | NIFK_FRAAL | Frankia alni | nifK | Detail |
| D4CZZ4 | NSCC_TRIVH | Trichophyton verrucosum (strain HKI 0517) | nscC TRV_00388 | Detail |
| P49307 | MOCA_RHIML | Rhizobium meliloti (Ensifer meliloti) (Sinorhizobium meliloti) | mocA | Detail |
| Q51658 | MAUG_PARDP | Paracoccus denitrificans (strain Pd 1222) | mauG Pden_4736 | Detail |
| P19066 | NIFD_SINFN | Sinorhizobium fredii (strain NBRC 101917 / NGR234) | nifD1 NGR_a01120 y4vL; nifD2 NGR_a00880 y4xB | Detail |
| B5XPH2 | NIFH_KLEP3 | Klebsiella pneumoniae (strain 342) | nifH KPK_1714 | Detail |
| B8ITG7 | NIFH_METNO | Methylobacterium nodulans (strain LMG 21967 / CNCM I-2342 / ORS 2060) | nifH Mnod_3996 | Detail |
| Q98AP7 | NIFH_RHILO | Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099) (Mesorhizobium loti (strain MAFF 303099)) | nifH mlr5905 | Detail |
| P9WGS3 | EPHD_MYCTU | Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv) | ephD Rv2214c MTCY190.25c | Detail |