Highly Effective Renaturation of a Streptokinase from Streptococcus pyogenes DT7 as Inclusion Bodies Overexpressed in Escherichia coli

Table 5

Effect of metal ions on streptokinase activity.

Additive	Residual activity (%) at the concentration (mM)
	1	3	5
AgNO2	16.1 ± 0.1	n.d.	n.d.
CaCl2	14.5 ± 0.2	n.d.	n.d.
CoCl2	15.6 ± 0.1	n.d.	n.d.
EDTA	50.4 ± 0.2	70.5 ± 0.3	88.2 ± 0.4
KCl	18.5 ± 0.1	25.2 ± 0.2	59.6 ± 0.5
MnSO4	40.5 ± 0.4	54.2 ± 0.3	68.4 ± 0.5