3.4.21.112	EDTA	increase in activity about 40% at 10 mM	
3.4.21.112	EGTA	increase in activity about 40% at 10 mM	
3.4.21.112	additional information	cellular stress induced by tunicamycin does not regulate the production of St-2	
3.4.21.112	N-acetyl-leucinal-leucinal-norleucinal	increases the level of St-1