Figure 1: Semi log plots showing thermal inactivation of the three quality related enzymes at different temperatures. (1A) Peroxidase (POD), (1B) Polyphenol oxidase (PPO), and (1C) Lipoxygenase, (LOX). The enzymes in assay buffer were incubated at various temperatures. At regular intervals, aliquots were removed to measure the residual activity expressed relative to that of an unheated control.