3.6.1.28	0.007	-	Zn2+	pH 8.5, IC50: 0.007 mM	667797	
3.6.1.28	0.015	0.02	Zn2+	inhibits at micromolar concentrations at pH 8.0, IC50: about 0.015-0.02 mM. Activates at pH 6.0	655738