Catalitic:			TIGRFAM_Id	TIGRFAM										RAST
nifH	Fer4_NifH	PF00142	TIGR01287	nifH: nitrogenase iron protein							nifH
nifD	Oxidored_nitro	PF00148	TIGR01282	nifD: nitrogenase molybdenum-iron protein alpha chain			EC 1.18.6.1
nifK	Oxidored_nitro	PF00148	TIGR01286	nifK: nitrogenase molybdenum-iron protein beta chain				EC 1.18.6.1

Biosynthetic:			TIGRFAM_Id	TIGRFAM
nifE	Oxidored_nitro	PF00148	TIGR01283	nifE: nitrogenase MoFe cofactor biosynthesis protein NifE			NifE	
nifN	Oxidored_nitro	PF00148	TIGR01285	nifN: nitrogenase molybdenum-iron cofactor biosynthesis protein NifN		NifN
nifB	Nitro_FeMo-Co	PF02579	TIGR01290	nifB: nitrogenase cofactor biosynthesis protein NifB				NifB