Acetylenic inhibitors of sheep vesicular gland oxygenase

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Acetylenic inhibitors of sheep vesicular gland oxygenase.

Biosynthesis of prostaglandins could be stopped by several acetylenic acids. They interfered with the oxygenase activity of the sheep vesicular gland enzymic system in two distinct patterns: an instantaneous, concentration-dependent effect and a time-dependent, destructive effect. Constants for both effects are reported. No measurable oxygen consumption tias observed with the acetylenic analogs...

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The inhibition of the fatty acid oxygenase of sheep vesicular gland by antioxidants.

Antioxidants inhibit the fatty acid oxygenase of sheep vesicular gland and soybean lipoxygenase in an ins~~n~us, reversible manner. Their in~bito~ effectiveness was not related to their traditional antioxidant potencies but seemed to depend on the nature of the enzyme. The destructive effect of eicosa-58, I I, +tetraynoic acid, a substrate analog, on vesicular gland oxygenase could be prevented...

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Inhibition of sheep vesicular gland oxygenase by unsaturated fatty acids from skin of essential fatty acid deficient rats.

Unsaturated fatty acids present in the lipids of essential fatty acid (EFA)deficient rats were found to inhibit the oxygenase activity of sheep vesicular gland in an instantaneous, reversible manner. However, competitive inhibition by high levels of these acids cannot account fully for the reported loss of prostaglandin synthetic capacity of these EFA-deficient animals. A similar competitive in...

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Effect of metal-complexing agents on the oxygenase activity of sheep vesicular glands.

A variety of agents that are known to complex copper can reversibly inhibit the oxygenation of unsaturated fatty acids by particulate preparations from sheep vesicular glands. The time-dependent activation of the oxygenase preparation by phenol, on the other hand, was not affected by the copper chelator, diethyldithiocarbamate. The results suggest that protein-bound copper could play a role in ...

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Co-oxygenation of organic substrates by the prostaglandin synthetase of sheep vesicular gland.

The microsomal fraction of sheep vesicular glands has been found to oxygenate 1,3-diphenylisobenzofuran, luminol, and the carcinogenic hydrocarbon benzopyrene when incubated with arachidonic acid. The oxygenations demonstrate an absolute dependence on enzyme and fatty acid and can be completely inhibited by indomethacin and 2,3-dimercaproptopanol, inhibitors of prostaglandin synthetase. The oxy...

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ژورنال

عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Lipids and Lipid Metabolism

سال: 1973

ISSN: 0005-2760

DOI: 10.1016/0005-2760(73)90095-7