13(S)-HpODE is produced by the oxidation of linoleic acid by lipoxygenase-1 (LO-1) in many plants including soybean, flaxseed, apples, and tea leaves,1,2 and by 15-LO in mammals.3 In plants, 13(S)-HpODE is the preferred substrate for the garlic bulb divinyl ether synthase.4 In mammalian tissues, 13(S)-HpODE is generally reduced to 13(S)-HODE,a compound which exhibits many biological activities.3 A direct action for 13(S)-HpODE has been demonstrated in Syrian hamster embryo cells where it stimulates EGF-dependent mitogenesis and up-regulation of EGF-dependent tyrosine phosphorylation.5 Membrane-esterified 13(S)-HpODE has been identified in human atherosclerotic plaques.6
12-oxo-13-HOME is an oxylipin derived from linoleic acid .1It is formedviaa 13-HpODE intermediate that is produced by lipoxygenase-mediated metabolism of linoleic acid.2,3,112-oxo-13-HOME has been found in corn and sunflower seedlings.4 1.Ogorodnikova, A.V., Gorina, S.S., Mukhtarova, L.S., et al.Stereospecific biosynthesis of (9S,13S)-10-oxo-phytoenoic acid in young maize rootsBiochim. Biophys. Acta1851(9)1262-1270(2015) 2.Veldink, G.A., and Vliegenthart, J.F.G.The enzymic conversions of 13-hydroperoxy-cis-9-trans-11-octadecadienoic acid into 13-hydroxy-12-oxo-cis-9-octadecenoic acidBiochem. J.110(4)58P(1968) 3.Gardner, H.W.Sequential enzymes of linoleic acid oxidation in corn germ: Lipoxygenase and linoleate hydroperoxide isomeraseJ. Lipid Res.11(4)311-321(1970) 4.Vick, B.A., and Zimmerman, D.C.Levels of oxygenated fatty acids in young corn and sunflower plantsPlant Physiol.69(5)1103-1108(1982)