Eicosanoids Are Hormones Derived from Arachidonic Acid

Eicosanoids Are Hormones Derived from Arachidonic Acid 

Oxygenated eicosanoids appear to be unique to animal cells. The first oxygenated eicosanoids to be discovered, the prostaglandins, were extracted from human semen in the 

Reaction catalyzed by prostaglandin endoperoxide synthase. This enzyme has two catalytic activities, as indicated next to the reaction arrows. 

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