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(A) Reverse-phase HPLC chromatogram with 10 mm × 250 mm, 5 µm column of turtle yolk hydrolysate. (B) DPP IV—Inhibition activity of RP-HPLC fractions (R1–R17). (C) DPP-IV inhibition activity of SCX fractions (S1–S10). Different letters (a–g) indicate significant differences between samples (p < 0.05).
