Costus afer Possesses Carbohydrate Hydrolyzing Enzymes Inhibitory Activity and Antioxidant Capacity In Vitro

Figure 4

Lineweaver-Burk plots of activity of α-amylase from Aspergillus oryzae in the absence (control) or presence of the methanol and ethyl acetate leaf, water stem, and ethyl acetate rhizome extracts.