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The heterogeneity of arylhydrocarbon hydroxylase in fetal liver microsomes of rats |
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| Authors: | K Mizokami M Sunouchi K Inoue K Fujimori A Takanaka Y Omori T Yubisui |
| Institution: | 1. Division of Pharmacology, Biological Safety Research Center, National Institute of Hygienic Sciences, Kamiyoga 1-18-1, Setagaya-ku, Tokyo 158, Japan;2. Department of Biochemistry, Medical College of Oita, Hazama-cho, Oita 879-56, Japan |
| Abstract: | The characteristic of arylhydrocarbon hydroxylase system in fetal liver microsomes of rat was investigated. NADH-synergistic effect on NADPH-dependent arylhydrocarbon hydroxylase was observed in fetal liver microsomes of rat but not in maternal liver microsomes. NADH-synergistic effect decreased in parallel with the decrease of the ratio of cytochrome b5/cytochrome P-450 in liver microsomes. The cytochrome P-450 in arylhydrocarbon hydroxylase system in fetal liver microsomes of rat seemed to be different from that in offspring liver microsomes in respect of its dependency on cytochrome b5 system for its maximum activity. |
| Keywords: | 3-MC 3-methylcholanthrene AHH arylhydrocarbon hydroxylase CO carbon monoxide PCMS p-chloromercuribenzenesulfonic acid |
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