Volumen XLI, Fasciculus I (1958) -No. 1-2. 11 von Wasserstoffsuperoxyd mehrere Male mit Wasser destilliert. Wenn S-Methylcystein oder Methionin in 2-n. Salzsaurelosung auf diese Weise mit Wasserstoffsuperoxyd behandelt wurden, so entstanden ausschliesslich die Sulfone. SUMMARY.y-Glutamyl-S-methylcysteine has been isolated from extracts of lima beans (Phaseolus Zunatus L.). Two further peptides, y-glutamyl-S-methylcysteine sulfoxide and y-glutamyl-leucine have been tentatively identified. In addition, free S-methylcysteine was found in such extracts. The presence of these constituents in varying amounts was observed in all of 6 other varieties of beans that were investigated. During germination S-methylcysteine and all peptides occurring in lima beans are metabolized to unknown products. An oxidation-reduction function during the early phases of growth is suggested for the system : y -glut amyl-S-meth ylc ysteinely -glut amyl-S-met hylc ysteine sulfoxide.
Fruit and Vegetable
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