①测定过程中样本应保持冰上放置,以免变性和失活;
②准确在20 s和320 s处完成吸光值测定,以确保实验结果的准确性和重复性;
③若A1大于1.5或者∆A大于0.6,建议将粗酶液适当稀释后再进行测定;若∆A小于0.02,建议适当延长酶促反应时间(10-15 min)或增加样本量后再进行测定,计算时相应修改;
④提取液中含有约1 mg/mL的蛋白,测定样本蛋白浓度时需要减去提取液自身的蛋白含量;
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