Fig. 6. Antioxidant activity against the OH-radical (%) of the synthetic peptide Gln-Tyr-Pro at different concentrations: 25, 50, 100, 200, and 400 mM.
is likely that the Tyr-Pro sequence in Gln-Tyr-Pro plays an impor-tant role in antioxidant activity. Further research is therefore needed to determine the activity of this tripeptide in vivo, and to identify peaks 2 and 3.