2.7.1.100	2-mercaptoethanol	20 mM, 70% of activity with dithiothreitol	
2.7.1.100	dithiothreitol	required for activity, maximal activity at 20 mM	
2.7.1.100	dithiothreitol	can partially be replaced by 20 mM 2-mercaptoethanol or glutathione	
2.7.1.100	glutathione	20 mM, 44% of activity with dithiothreitol	
2.7.1.100	additional information	strong upregulation of enzyme expression during sulfur starvation