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Effect of KYNA on cell proliferation of AGS cells. Colony formation assay measured the anti-proliferation effect. Cells were treated with KYNA (0, 150, 200, and 250 μM) for 2 weeks. The results obtained from three independent experiments were expressed as mean ± standard deviation (SD) compared with the control group. ** p < 0.01, *** p < 0.001.
