An enzyme that is responsible for the formation of prostanoids – prostaglandins, prostacyclins, and thromboxanes that are each involved in the inflammatory response. Two different COX enzymes existed, now known as COX-1 and COX-2.
A human protein (enzyme) that helps to protect the inner lining of the stomach. Aspirin and some other pain-relieving drugs can block the protective action of cyclooxygenase.