1.8.4.9	(NH4)2SO4	500 mM, stimulates	687585	
1.8.4.9	(NH4)2SO4	highly activating	687585	
1.8.4.9	Fe2+	APR contains a FeS cluster	694695	
1.8.4.9	Fe2+	FeS cluster as a cofactor in PpAPR	687585	
1.8.4.9	KNO3	500 mM, stimulates	687585	
1.8.4.9	Mg2+	-	694695	
1.8.4.9	Mg2+	activates 18-24fold at 500 mM	687585	
1.8.4.9	MgCl2	500 mM, stimulates	687585	
1.8.4.9	MgSO4	500 mM, stimulates	687585	
1.8.4.9	additional information	no iron is associated with recombinant PpPAPR	687585