GO:0009399

Nitrogenase MoFe cofactor biosynthesis protein NifE domain protein
Nitrogenase molybdenum-iron cofactor biosynthesis protein NifN, putative
Nitrogen fixation protein NifU
two-component sigma-54 specific nitrogen transcriptional regulator, Fis subfamily; N-terminal response receiver (RefSeq)
glutamine synthetase, type I (RefSeq)