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[Content of cytochrome P-450 and its induction capacity in primary liver tumors in rats].

The content of cytochrome P-450 has been measured in primary hepatomas induced by diethylnitrosamine. As a rule, the enzyme content in hepatomas was decreased, as compared to normal liver and tumor-affected liver, but some hepatomas contained cytochrome P-450 in greater amount than normal tissue. Aroclor 1254 induced an increase in cytochrome P-450 content, which was identical in hepatomas, normal liver and tumor-affected liver. The dependence of hepatoma morphology on cytochrome P-450 content was not detected.