The effect of pH on the relative rate of hydrolysis of triolein was
determined by incubation of samples in a range of pH from 3.0 to
9.0 (80 mM MMT buffer, adjusted to different pH). Olive lipase was
apparently not active below pH 3 and above pH 8; an optimal
activity was recorded at pH 5 (Fig. 2), suggesting that the enzyme is
less stable at high pH.