What is the fine-grained topic of the following text: Since, as far as is known, indomethacin is not an inhibitor of lipoxygenase, it is highly possible that cyclo-oxygenase was involved in the above-mentioned conversion of arachidonic acid to prostaglandins and a thromboxane. Only return the topic.
The role of cyclo-oxygenase in the conversion of arachidonic acid to prostaglandins and thromboxane.