Study of a Lipohydroperoxide Breakdown Factor in Soy Extractsa

Abstract
SUMMARY: The rapid decrease in linoleic acid hydroperoxides observed with relatively high levels of soy flour extract was investigated. The hydroperoxide breakdown factor can be eliminated by high‐temperature short‐time treatment of soy extracts. The addition of KCN to reaction mixtures caused a partial inhibition of the breakdown factor activity. Variations in hydroperoxide breakdown activity with variations in pH and reaction time were studied. A possible optimum at pH 8‐9 was indicated. Qualitative evidence for the presence of a lipohydroperoxidase was obtained with well‐known reagents that produce a specific color reaction with peroxidases.