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目的测定联合诱导法和多氯联苯诱导法制备的大鼠肝S9的蛋白含量并对这两种方法进行比较。方法采用苯巴比妥与β—萘黄酮合并诱导所获S9作为诱导剂制备大鼠肝S9,并采用Bradford法测定所制备的S9蛋白含量。结果成功制得大鼠肝S9,并测定其蛋白含量为26.73 mg/ml。结论联合诱导法可以替代多氯联苯诱导法制备肝匀浆S9。“,”Objective: To determine the content of protein in rat liver S9 prepared by combination inducing method and PCB inducing method and compare the two methods. Methods: Rat liver S9 was prepared using S9 obtained by combination inducing method with phenobarbital and β-naphthoflavone as the inducer and the content of protein in the prepared S9 was determined by Bradford method. Results: Rat liver S9 was successfully prepared and the protein content was 26.73 mg/ml. Conclusion: Combination inducing method may supersede PCB inducing method for preparation of liver homogenate S9.