3.2.1.86 Ca2+ enhances activity, at 5 mM 11% increase in activity compared to activity without added ion 666900 3.2.1.86 Ca2+ much less effective activator than Mn2+ 655795 3.2.1.86 Ca2+ stabilizes the enzyme activity 731178 3.2.1.86 Mg2+ enhances activity, maximal hydrolysis of p-nitrophenyl-beta-D-glucopyranoside at 5 mM, 7% increase in activity compared to activity without added ion 666900 3.2.1.86 Mg2+ much less effective activator than Mn2+ 655795 3.2.1.86 Mg2+ stabilizes the enzyme activity 731178 3.2.1.86 Mn2+ - 705622 3.2.1.86 Mn2+ best activator 655795 3.2.1.86 Mn2+ stabilizes the enzyme activity 731178