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. 2022 May 12;9:892426. doi: 10.3389/fnut.2022.892426

Figure 4.

Figure 4

Fluorescence spectra of DPP-4 in the absence and presence of hyperoside (A), myricetin (B), narcissoside (C), cyanidin 3-O-glucoside (D), isoliquiritigenin (E) at different concentrations and the Stern-Volmer plots for the fluorescence quenching of DPP-4 by the flavonoids at different temperatures.