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It is well known that cytochrome P-450 (CYP) 1A was thought to be responsible for activation of the majority of precarcinogens and premutagens in human liver. The level of CYP1A may serve as a potential indicator of carcinogenesis.[1] Therefore, study of CYP1A expression in human fetal liver and extrahepatic tissue still seems to be important with respect to the possible toxicological significance. Our previous work demonstrated the greater activities of drug-metabolizing enzymes in human… 相似文献