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  • Title: Metabolism of prostaglandin E1 and of glutathione conjugate of prostaglandin A1 (GSH-prostaglandin A1) by prostaglandin 9-ketoreductase from rabbit kidney.
    Author: Toft BS, Hansen HS.
    Journal: Biochim Biophys Acta; 1979 Jul 27; 574(1):33-8. PubMed ID: 476135.
    Abstract:
    Rabbit kidney prostaglandin 9-ketoreductase was found to metabolize the glutathione conjugate of prostaglandin A1 (GSH-prostaglandin A1). Apparent Km (GSH-prostaglandin A1) 13 microM and apparent Km (prostaglandin E1) 200 microM. The cytosolic preparation was subjected to gelfiltration and isoelectric focusing, which revealed that metabolism of prostaglandin E1 and GSH-prostaglandin A1 occurs by means of the same fractions. Furthermore, prostaglandin E1 and GSH-prostaglandin A1 are competitive inhibitors of the enzyme, when GSH-prostaglandin A1 and prostaglandin E1 are tested as substrates, respectively. It si concluded, that GSH-prostaglandin A1 is a much better substrate for prostaglandin 9-ketoreductase from rabbit kidney than is prostaglandin E1.
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