COG1348

NifH/frxC family:ATP/GTP-binding site motif A (P-loop) (NCBI)
nitrogenase iron protein (nitrogenase component II) (NCBI)
Nitrogenase iron protein
protochlorophyllide reductase iron-sulfur ATP-binding protein BchL (RefSeq)
bacteriochlorophyllide reductase iron protein subunit BchX (RefSeq)