Metal  ions and chemical reagents (1mM) Relative activity (%) Metal  ions and chemical reagents (1mM) Relative activity (%)
CK 100.0±0.725 Fe2+ 123.9 ±2.321a
K+ 115.6±1.324 Ag+ 78.40 ±2.342a
Cs+ 114.1±1.827 Zn2+ 102.3 ±0.643
Co2+ 143.6±2.627a Mn2+ 174.9 ±2.743a
Ca2+ 110.4±0.527 EDTA 109.7±0.725
Cu2+ 63.70 ±2.623a SDS 0 ±0
Mg2+ 107.5 ±0.428    
Table 2:The effect of different metal ions and chemicals on the recombinant enzyme. avalues are significantly different from the control (P<0.05).