3.5.1.38	2-mercaptoethanol	slight activation	
3.5.1.38	cysteine	slight activation	
3.5.1.38	dithiothreitol	slight activation	
3.5.1.38	additional information	use of phosphate buffer yields higher activities than Tris, phthalate, or citrate buffer, optimum concentration is 0.08 - 0.16 M phosphate