2.8.1.6	Iron	presence of a [2Fe-2S] cluster	645582, 645583, 645588, 645600, 645604	
2.8.1.6	Iron	the 104000 Da dimeric enzyme form contains a single [2Fe-2S] cluster per dimer	645583, 645586	
2.8.1.6	Iron	the 82000 Da dimeric enzyme form contains one [2Fe-2S]cluster per monomer	645583, 645586	
2.8.1.6	Fe2+	required	645585	
2.8.1.6	FeCl3	-	645587, 645595	
2.8.1.6	FeCl3	enhances activity 3-4fold at 0.1 mM	645587	
2.8.1.6	Na2S	-	645587, 645595	
2.8.1.6	Na2S	enhances activity 3-4fold at 1 mM	645587	
2.8.1.6	Ca2+	enhances activity	645589	
2.8.1.6	Mn2+	enhances activity	645589