| P56265 | NIFB_KLEOX | Klebsiella oxytoca | nifB | Detail |
| P46044 | NIFB_FRAAL | Frankia alni | nifB | Detail |
| Q8KCA0 | PHK_CHLTE | Chlorobaculum tepidum (strain ATCC 49652 / DSM 12025 / NBRC 103806 / TLS) (Chlorobium tepidum) | CT1524 | Detail |
| Q608B0 | PHK_METCA | Methylococcus capsulatus (strain ATCC 33009 / NCIMB 11132 / Bath) | MCA1587 | Detail |
| Q6N976 | PHK_RHOPA | Rhodopseudomonas palustris (strain ATCC BAA-98 / CGA009) | RPA1673 | Detail |
| Q8CK51 | PHK_STRCO | Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145) | SCO0617 SCF55.41c SCF56.01c | Detail |
| P52706 | MDL1_PRUSE | Prunus serotina (Black cherry) | MDL1 | Detail |
| O24243 | MDL1_PRUDU | Prunus dulcis (Almond) (Amygdalus dulcis) | MDL1 | Detail |
| O82784 | MDL4_PRUSE | Prunus serotina (Black cherry) | MDL4 | Detail |
| Q5N0G7 | PHK_SYNP6 | Synechococcus sp. (strain ATCC 27144 / PCC 6301 / SAUG 1402/1) (Anacystis nidulans) | syc2013_c | Detail |