Anti precursor feeding

Feeding experiments with H- and " C-labeled precursors in leaves of horseradish Armoracia lapathifolia) demonstrated the stereospecific removal of the 4-/7/ c>-5-hydrogen of homomethionine during the biosynthesis of sinigrin. The fate of the 5-hydrogens has also been established by H-NMR (Fig. 17.5) (Dewick, 1984). An overall anti process is involved. Mutants of Arabidopsis thaliana which lack the ability to extend the carbon chain of methionine beyond the homomethionine stage have been reported (Davin et al., 1988). 

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