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(a) Enzyme activity is maximum in culture supernatant. Comparatively, less activity is seen in cell lysate at pH 5 and pH 8. Error bars with standard error are shown. (b) At constant pH 5, enzyme activity is enhanced in presence of 0.7 mM Cu and 2.7 mM Fe. Maximum activity is seen in extracellular form. Activity in presence of both Cu and Fe is lower than that in presence of only Cu. Error bars with standard error are displayed.
