The Bradford method was used to measure the concentration of protein in liver microsome, and activities of cytochrome P450 enzymes were determined by the spectrophotometer method.

• 测定一月龄至八月龄不同性别的猪，肝微粒体蛋白含量、CYP450含量、CYPb5含量、NADPH-细胞色素C还原酶活性、氨基比林-N-脱甲基酶活性、红霉素-N-脱甲基酶活性和苯胺-4-羟化酶活性。