Linoleate : oxygen oxidoreductase

Lipoxygenase (linoleate oxygen oxidoreductase) catalyzes the hydroperoxidation of fatty acids containing a methylene-interrupted conjugated diene system. The degradation of the hydroperoxides results in the formation of numerous secondary products (46-48). 

Lipoxygenases (EC 1.13.11.12, linoleate oxygen oxidoreductase) are found in many plants with soybeans having the highest activity. The characteristics of these enzymes were reviewed recently (Robinson et al., 1995 Gardner, 2003). Fujimaki et al. (1965) showed that lipoxygenase was associated with hexanal production in soybeans. 

Lipoxygenase (linoleate oxygen oxidoreductase, EC 1.13.11,12) is a term applied to a group of enzymes which catalyse the oxygenation, by molecular oxygen, of fatty acids containing a cw, cw-1, 4-pentadiene system to produce conjugated hydroperoxydiene derivatives (see also Section 10.3) ... 

Provitamins A exhibit anticarcinogenic effects, because they are part of the control mechanisms that scavenge free radicals (toxic forms of oxygen). Their antioxidant potential is relatively low. Other carotenoids that do not act as provitamins A have significantly higher antioxidant activities, such as lycopene, zeaxanthin and lutein. The enzymes that oxidise fatty acids (lipoxygenases or linoleate O2 oxidoreductases, formerly known as Kpoxidases) are antivitamins A. 

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