【摘要】 测定了扁玉螺（ＮｅｖｅｒｉｔａｄｉｙｍａＲｏｄｉｎｇ）肝脏中细胞色素氧化酶活力，其最适温度为４４°Ｃ，最适ｐＨ值７．０．研究了Ｆｅ３＋，Ｃｕ２＋，Ｚｎ２＋三种重金属离子在离体（ｉｎｖｉｔｒｏ）条件下对该酶的影响，结果显示：低浓度的Ｆｅ３＋，Ｃｕ２＋对其具有激活作用，高浓度的Ｆｅ３＋，Ｃｕ２＋及低浓度的Ｚｎ２＋对其具有显著的抑制作用．更多还原

【Abstract】 The optimum condition of cytochrome oxidase(CCO) in the hepatopancreas from the gastropod mullask Neverita didyma (Roding) is analyzed. The optimal temperature is 44℃ and pH 7.0. The effects of Fe 3+ ,Cu 2+ and Zn 2+ on CCO in vitro are studied. The results indicate that the activity of CCO is activated by Fe 3+ (5.88×10 -5 ～2.94×10 -4 mol/L) ,Cu 2+ (9.80×10 -6 ～6.86×10 -5 mol/L) and is inhibited when the concentration of Fe 3+ or Cu 2+ were higher. The CCO is inhibited even in lower concentration of Zn 2+ (1.96×10 -9 mol/L).更多还原