Abstract

Glutathione- S-epoxide transferase activity in rat liver was studied with three epoxide substrates. The specific activities in the high-speed liver supernatant fraction for 3MC 11, 12 oxide, styrene oxide and 3,3,3-trichloro-1,2 epoxy propane were 5.7, 86.4 and 165 nmoles/5 min/mg protein, respectively. Phenobarbital (75 mg/kg body wt for 3 days) or 3-methylcholanthrene (20 mg/kg body wt for 2 days) administration to rats resulted in a 40–60% increase in enzyme activity. β-napthoflavone administration on the other hand was without any effect on glutathione- S-epoxide transferase activity.

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