Abstract
Whey protein concentrate hydrolysates, capable of inhibiting the activity of angiotensin-converting enzyme, were prepared in the present study. Several parameters, such as type of enzyme, enzyme:substrate ratio, and use of ultrafiltration were evaluated. The angiotensin-converting enzyme inhibitory activity was observed only after the enzymatic treatment and high rates of inhibition were obtained, ranging from 17.29 to 91.88%. Most hydrolysates obtained with pancreatin showed higher angiotensin-converting enzyme inhibitory activity than those obtained with papain both in the absence and presence of ultrafiltration. The smallest enzyme:substrate ratio for pancreatin resulted in better angiotensin-converting enzyme inhibitory activity values. The use of ultrafiltration proved to be disadvantageous for inhibitory activity of hydrolysates obtained with papain.
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