Microsomes of bovine corneal epithelium metabolized [14C]arachidonic acid extensively to [14C]12-hydroxyeicosatetraenoic acid. The biosynthesis was not stimulated by exogenous NADPH and it could be inhibited by over 90% with two lipoxygenase inhibitors, esculetin and eicosatetraynoic acid. Chiral phase high performance liquid chromatography showed that 12-HETE consisted of the 12S enantiomer. The results indicate biosynthesis by 12S-lipoxygenase of bovine corneal epithelium rather than by cytochrome P450.
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Ernst H. Oliw (1993) studied this question.
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