Resumo
The peptide profile, the angiotensin converting enzyme-inhibitory activity (ACE-IA) and the antioxidant property are important characteristics of protein hydrolysates and this was the first time the correlation among these parameters was investigated. Twenty-four hydrolysates from whey protein concentrate were prepared using four enzymes. With respect to the antioxidant activity, when using the
B. licheniformis protease, a positive and significant correlation of strong intensity was observed with the contents of di- and tripeptides and medium peptides. Also, a negative and significant correlation of strong intensity was observed with the large peptide content. For the
A. sojae protease and pancreatin, a positive and significant correlation of strong intensity was observed with the contents of di-and tripeptides. For the
A. sojae protease, a negative and significant correlation of strong intensity was observed with the large peptide content. Concerning the ACE-IA, for the
B. l
icheniformis and
A. s
ojae proteases and pancreatin, a positive and significant correlation of strong intensity was observed with the contents of di-and tripeptides and medium peptides. For the A.
sojae protease and pancreatin, this same kind of correlation was observed with the free amino acid content. For the
B. licheniformis, A. s
ojae and A. o
ryzae proteases and pancreatin, a negative and significant correlation of strong intensity was observed with the large peptide content.
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