Effect of allicin on the cell cycle progression of chondrocytes. Following treatment with allicin, chondrocytes were stained with PI and analyzed using flow cytometry. (A) Untreated control chondrocytes; (B-D) Chondrocytes treated with 10, 20, 30, 40 and 200 μg/mL of allicin, respectively. The percentage of chondrocytes in the (E) G0/G1 and (F) S phases following allicin treatment. Data are presented as the average ± SD (error bars) from three independent experiments.