Figure 2

Dose response curves of inhibitory activities of MG132, baicalein, pectolinarin, myricetin, hispidulin, isoliquiritigenin and quercetin. The IC₅₀ values were calculated by fitting with the four parameter logistic (4-PL) model: A. MG132 IC₅₀=27.97 μM, R²=0.99. B. baicalein IC₅₀=45.65 μM, R²=0.97. C. pectolinarin IC₅₀=49.96 μM, R²=0.97. D. myricetin IC₅₀=55.39 μM, R²=0.96. E. hispidulin IC₅₀=58.31 μM, R²=0.97. F. isoliquiritigenin IC₅₀=63.90 μM, R²=0.99. G. quercetin IC₅₀=71.29 μM, R²=0.96. R², adjust R square values. Dose response curves of inhibitory activity were presented. Data are shown as mean ± SD of three independent experiments.