A: Panc-1 and MIA PaCa-2 cells were treated with EGCG for 24 h, as indicated, and the cell cycle phase transition was determined by flow cytometry following PI staining. B: EGCG modulated S/G2 phases arrest protein expression. Immunoblots for phosphorylated Chk1 (p-Chk1), phosphorylated p53 (p-p53), p53, p21, cdc2, and cyclin B1 in total cell protein extracts from Panc-1 and MIA PaCa-2 cells treated with escalating concentrations of EGCG, as indicated, for 24 h. Loading control: β-Actin. Bands were quantified and results are expressed as percentage of control. *p<0.05, **p<0.01 vs. control.