Antioxidant and metal chelating activities of peptide fractions from phaseolin and bean protein hydrolysates

► Hydrolysis of purified phaseolin is more effective than hydrolysis of the isolate. ► Highest antioxidant activity was found in the smaller fractions of hydrolysates. ► Phaseolin is the major contributor to the antioxidant and Cu chelating activities. ► Iron chelating activity appears to derive from hydrolysis of other bean proteins.