Fig. 1. The chemical structure of the tripeptide, Pro-His-Pro (PHP) (A). Effects of PHP on the viability of HepG2 cells (B). Intracellular ROS scavenging capacities of different concentrations of PHP and different incubation time under conditions of AAPH-induced oxidative stress in HepG2 cells (C). Intracellular ROS scavenging capacities of different concentrations of PHP and Trolox at 180 min of incubation (D). Data are presented as the mean ± SD. Different letters indicate significant differences at P < 0.05, n = 3 data points.
