化学
水解物
DPPH
清除
胃蛋白酶
水解
Zeta电位
酶
食品科学
色谱法
酶水解
抗氧化剂
生物化学
化学工程
纳米颗粒
工程类
作者
Yuanhong Zhang,Weizheng Sun,Mouming Zhao,Guowan Su,Ning Zheng-xiang,Dongxiao Sun‐Waterhouse
摘要
Summary This study aimed to investigate the effect of pepsin pretreatment on the ACE ‐inhibitory and DPPH radical scavenging activities of soya protein hydrolysates prepared with alcalase and protamex. The protein recovery, TCA ‐soluble peptide content, surface hydrophobicity, particle size and zeta potential were evaluated. Results showed that the hydrolysates exhibited varying ACE ‐inhibitory (i.e. the highest value 72.6% by alcalase and 84.3% by protamex) and DPPH radical scavenging activities (i.e. the highest value 51.9% by alcalase and 51.7% by protamex). Pepsin pretreatment could make soya proteins more susceptible for hydrolysis, and the results showed that the ACE ‐inhibitory and DPPH radical scavenging activities of the resultant hydrolysates were improved. A highly significant positive correlation between ACE ‐inhibitory and DPPH radical scavenging activities was observed in the alcalase hydrolysates, while no significant correlation among other treatments. The physical properties of hydrolysates, that is surface hydrophobicity, particle size and zeta potential, could influence their ACE ‐inhibitory and DPPH radical scavenging activities.
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