octadecatrienoic acid/maís

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Transformations of alpha-linolenic acid in leaves of corn (Zea mays L.).

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Short incubation of [1-14C]alpha-linolenic acid with whole homogenate of leaves of corn (Zea mays L.) led to the formation of 4 major lipoxygenase products, i.e. 12-oxo-13-hydroxy-9(Z),15(Z)-octadecadienoic acid, 12-oxo-10,15(Z)-phytodienoic acid (12-oxo-PDA),

Allene oxide cyclase: a new enzyme in plant lipid metabolism.

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The mechanism of the biosynthesis of 12-oxo-10,15(Z)-phytodienoic acid (12-oxo-PDA) from 13(S)-hydroperoxy-9(Z),11(E),15(Z)-octadecatrienoic acid in preparations of corn (Zea mays L.) was studied. In the initial reaction the hydroperoxide was converted into an unstable allene oxide,

Method to produce 9(S)-hydroperoxides of linoleic and linolenic acids by maize lipoxygenase.

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Seed from maize (corn) Zea mays provides a ready source of 9-lipoxygenase that oxidizes linoleic acid and linolenic acid into 9(S)-hydroperoxy-10(E),12(Z)-octadecadienoic acid and 9(S)-hydroperoxy-10(E),12(Z),15(Z)-octadecatrienoic acid, respectively. Corn seed has a very active

Purification and Characterization of Allene Oxide Cyclase from Dry Corn Seeds.

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Allene oxide cyclase (AOC; EC 5.3.99.6) catalyzes the cyclization of 12,13(S)-epoxy-9(Z),11,15(Z)-octadecatrienoic acid to 12-oxo- 10,15(Z)-phytodienoic acid, the precursor of jasmonic acid (JA). This soluble enzyme was purified 2000-fold from dry corn (Zea mays L.) kernels to apparent homogeneity.

Biosynthesis of 12-oxo-10,15(Z)-phytodienoic acid: identification of an allene oxide cyclase.

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Incubation of 13(S)-hydroperoxy-9(Z),11(E),15(Z)-octadecatrienoic acid with corn (Zea mays L.) hydroperoxide dehydrase led to the formation of an unstable allene oxide derivative, 12,13(S)-epoxy-9(Z),11,15(Z)-octadecatrienoic acid. Further conversion of the allene oxide yielded two major products,

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Herbal & Natural Medicine

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