Table 1.

Effect of cations (final concentration 10 mM) on the relative activity (%) of the exo-PG from R. pusillus partially purified. The asterisks designate significant differences between arithmetic means by Student's t-test (p < 0.05) ± standard deviation. The experiments were performed at pH 5.0 at 60°C.

Ions (10 mM)	Mean (%)		SD (%)
Control	100.0	±	0.8
NaCl	95.2	±	8.0
MgCl2	34.1∗	±	3.5
AlCl3	125.4∗	±	7.8
KCl	96.2∗	±	0.7
FeCl3	0.0∗		—
CaCl2	170.3∗	±	0.8
BaCl2	24.5∗	±	6.5
MnCl2	0.0∗		—