Fig. 4. Inhibition of DPP IV by cyanidin, cyanidin 3-glucoside and cyanidin 3, 5- diglucoside. Inhibitory activities of cyanidin, cyanidin 3-glucoside and cyanidin 3, 5- diglucoside against DPP IV were measured. DPP IV activity was inhibited by about
25% by cyanidin 3, 5-diglucoside but not by cyanidin or cyanidin 3-glucoside. Values are means ± S.E. n ¼ 4 experiments. Statistically significant: **p < 0.01.