1.1.1.336	dithiothreitol	2 mM, maximum activation	
1.1.1.336	additional information	the presence of SH compounds is required for activity	
1.1.1.336	N-acetylglucosamine 1-phosphate	activation at low UDP-N-acetylmannosamine concentrations	
1.1.1.336	tris-(2-carboxyethyl)phosphine hydrochloride	1 mM, about 25% increase in activity