Cyclooxygenase (COX), officially known as prostaglandin-endoperoxide synthase (PTGS), is an enzyme ({EC_number|1.14.99.1}) that is responsible for formation of important biological mediators called prostanoids, including prostaglandins, prostacyclin and thromboxane. Because the `COX` term is used for the stem symbol for `cytochrome c oxidase` ... Found on http://en.wikipedia.org/wiki/Cyclooxygenase
<enzyme> An enzyme protein complex present in most tissues that catalyses two steps in prostaglandin biosynthesis and produces prostaglandins and thromboxanes from arachidonic acid. ... The cyclooxygenase activity converts arachidonate and 2O2 to prostaglandin G2; the hydroperoxidase activity uses glutathione to convert prostaglandin G2 to pr... Found on http://www.encyclo.co.uk/local/20973