1.97.1.2	Fe	-	437679	
1.97.1.2	Fe	144 Fe atoms in 36 clusters per enzyme	437680	
1.97.1.2	Fe	iron-sulfur cluster	437677, 437678	
1.97.1.2	Fe	three [4Fe-4S] centers in the beta subunit	660360	
1.97.1.2	Mo	12 molybdenum atoms per enzyme	437680	
1.97.1.2	Mo	active Mo-molybdopterin guanidine dinucleotide (MGD)2 site in the alpha-subunit	660360	
1.97.1.2	Mo	enzyme contains Mo, 0.92 mol moybdenum per mol enzyme	437678	
1.97.1.2	Molybdenum	molybdopterin-containing enzyme	673091