Hemoproteins in Microsomes in Liver of Tumor-bearing Rats*

Abstract
Cytochrome b5 and P-450 in microsomes, and catalase were analysed in the liver of normal and rats bearing Rhodamine sarcoma, methylcholanthrene sarcoma, ascites hepatomas AH 130 or AH 66 F. In the liver of all animals bearing any one of tumors, the liver catalase activity was depressed. Significant decreases in cytochrome b5 and P-450 level were observed in the liver bearing AH 66 F or methylcholanthrene sarcoma. This is the first case of the depression of hemoprotein in the liver of tumor-bearing animals other than catalase.

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