| P27714 | NIFB_HERSE | Herbaspirillum seropedicae | nifB | Detail |
| O07609 | YHFK_BACSU | Bacillus subtilis (strain 168) | yhfK BSU10260 | Detail |
| Q9Y7M1 | YGK4_SCHPO | Schizosaccharomyces pombe (strain 972 / ATCC 24843) (Fission yeast) | SPBC725.04 | Detail |
| P39994 | YEC0_YEAST | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast) | YEL020C | Detail |
| Q47GC6 | HOA2_DECAR | Dechloromonas aromatica (strain RCB) | Daro_1356 | Detail |
| B4EFI7 | HOA2_BURCJ | Burkholderia cenocepacia (strain ATCC BAA-245 / DSM 16553 / LMG 16656 / NCTC 13227 / J2315 / CF5610) (Burkholderia cepacia (strain J2315)) | BceJ2315_55580 BCAM2121 | Detail |
| A5V856 | HOA2_SPHWW | Sphingomonas wittichii (strain RW1 / DSM 6014 / JCM 10273) | Swit_2113 | Detail |
| Q0RWN1 | HOA7_RHOJR | Rhodococcus jostii (strain RHA1) | RHA1_ro10112 | Detail |
| P39384 | YJIM_ECOLI | Escherichia coli (strain K12) | yjiM b4335 JW5786 | Detail |
| Q58217 | Y807_METJA | Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) (Methanococcus jannaschii) | MJ0807 | Detail |