Figure 2: Comparison of cell cycle progression in activated macrophages treated with phytohemagglutinin (PHA), lithium (Li), xanthine-catechin (XC) mixture, and Li and XC (LXC) mixture and cultured for 72 h. (a) Representative flow cytometry analysis graphs for each treatment. G1 = gap 1 phase, G2 = gap 2 phase, and S = synthesis phase. Statistical analysis was performed using two-way analysis of variance followed by Bonferroni post hoc test. The different letters (i.e., A, B, C, and D) indicate statistical differences in each treatment at .