重金属对扁玉螺过氧化氢酶活性的影响研究

THE EFFECT OF HEAVY METALS ON CATALASE FROM Nevertia diyma (Roding)

离体条件下测定了扁玉螺肝脏过氧化氢酶的活性。结果表明 ,其最适 pH值为8.67,蛋白含量为0.2～2.1mg/g。Fe3 + ,Cu2 + ,Zn2 + ,Pb2 + 对过氧化氢酶既有激活作用也有抑制作用 ,这种作用与各种离子的浓度有关。

The in vitro catalase activity in the hepatopancreas of Nevertia diyma (Roding) was measured. The result showed that the optimum pH was 8.64, and the optimal protein concentration 0.2～2.1 mg. Its catalytic activity was obviously activated by the following elements within their specific ranges Fe3+ (1.0～10.0 mmol/L), Cu2+ (below 1.0×10-6 mol/L), Zn2+ (below 1.0×10-9 mol/L)and Pb2+ (5.0×10-10～5.0×10-7 mol/L).