Enzymatic Degradation of Hydroperoxides

The difference in volatile products in plants (aldehydes) and mushrooms (allyl alcohols) is due to the different substrate and reaction specificity of HPL. In the first case, in hydroperoxides with conjugated diene systems (Fig. 3.31a), the bond between the C-atom bearing the HOO-group and the C-atom of the diene system is cleaved. In the second case (Fig. 3.31b), cleavage of hydroperoxides with isolated double bonds occurs in the opposite direction between the C-atom 

Allene oxide synthase (AOS) is a cytochrome P450 enzyme which was first found in flaxseed. It catalyzes the degradation of hydroperoxides to very instable allene oxides (tj/2 33 s). On 

Linoleic acid 9-hydroperoxide formed by lipoxygenase in potato is changed enzymatically by elimination of water into a fatty acid with a dieny 1-ether structure  

In addition to hpoxygenase, lipoperoxidase activity has been observed in oats. The 9-hydroperoxide formed initially is reduced to 9-hy droxy-trans-10,cis-12-octadecadienoic 

Cucumber, pear 9(S)-hydroperoxy-10-trans, 12-cis-octadecadienoic acid (9-LOOH) (Z)-3-nonenal + 9-oxo-nonanoicadd 

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