Allene oxide cyclase (AOC) catalyzes the stereospecific cyclization of an unstable allene oxide to (9S,13S)-12-oxo-(10,15Z)-phytodienoic acid, which is the precursor next to jasmonic acid.

• 丙二烯环化氧化酶AOC能把一种不稳定的具有立体特异性的丙二烯环化物催化氧化成(9S, 13S)-12-O-(10，15Z)-植物二烯酸，此植物二烯酸是茉莉酸的最终前体。