Abstract
The florets of Brassica oleracea L. var. italica (Brassicaceae) are an important nutritional supplement containing a high percentage of sulphur compounds. GC/MS analysis of the volatiles produced by the action of endogenous cystine lyase on S-methyl-cysteine sulphoxide present in Broccoli florets showed three sulphur components: dimethyl disulphide, dimethyl trisulphide and 3,5-dimethyl-1,2,4-trithiolane. Four isothiocyanate compounds were also present. Cystine lyase enzymatic fission of endogenous myrosinase gave the unsaturated glucosinolates ethenyl isothiocyanate and allylisothiocyanate, together with the saturated 4-methylthiobutyl isothiocyanate (Erucin) and the aromatic 2-phenylethyl isothiocyanate.
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