Azotobacter chroococcum	-	440139	
Azotobacter vinelandii	-	440138, 676833, 685165, 686108, 688191, 745372, 746397	
Azotobacter vinelandii	nif-specific flavodoxin	440137	
Azotobacter vinelandii	OP	440137	
Azotobacter vinelandii DJ995	-	685165, 688191	
Azotobacter vinelandii OP	OP	440137	
Klebsiella pneumoniae	-	440135, 440140	
Klebsiella pneumoniae	nif gene-specific flavodoxin	440134, 440136	
Lotus japonicus	Japanese trefoil	699812	
Medicago sativa	cv. Aragon R-1	728538