Figure 3From: Identification of plant-derived natural products as potential inhibitors of the Mycobacterium tuberculosis proteasome Dose response curves of inhibitory activities of emodin, baicalin, icariin, kaempferol, celastrol and curcumin. The IC50 values were calculated by fitting with the four parameter logistic (4-PL) model: A. emodin IC50=81.05 μM, R2=0.97. B. baicalin IC50=83.52 μM, R2=0.99. C. icariin IC50=88.67 μM, R2=0.99. D. kaempferol IC50=106.74 μM, R2=0.99. E. celastrol IC50=114.02 μM, R2=0.98. F. curcumin IC50=114.27 μM, R2=0.99. R2, adjust R square values. Dose response curves of inhibitory activity were presented. Data are shown as mean ± SD of three independent experiments.Back to article page