摘要
采用AS1.398和Alcalase两种蛋白酶,制备了水解度为10%24%的大豆多肽,对其抗氧化性、ACE抑制活性和相对分子质量的分布进行了研究,结果表明:采用AS1.398酶水解的DH为12%的产品抗氧化活性最高,添加量为6mg/mL时使亚油酸的氧化诱导期延长2.92倍,其相对分子质量分布在1000以上的组分较多;采用Alcalase酶水解的DH为14%的大豆多肽产品,ACE抑制活性最高,IC50为0.144mg/mL,其相对分子质量分布大多在200600之间.
The experiments investigating the properties of antioxidant activity,ACE inhibitory activity, and molecular weight distribution of the soybean polypeptides with DH of 10%~24% producted by AS1.398 and Alcalase, were conducted.The results indicated that the sample producted by hydrolyzing SPI with AS1.398 at DH 12% had the best antioxidant activity among all the other samples. The oxidant induction period of linoleic acid was extended to 2.92 times of that of the blank when the sample concentration was 6 mg/mL.Whereas, the sample producted by hydrolyzing SPI with Alcalase at DH 14% had highest ACE inhibitory activity among all the samples, and its IC_(50) was 0.144mg/ml.From molecular weight distribution measurements,it could be found that the hydrolysates with higher antioxidant activity were those having more peptides(consists of about 10 amino acid units, MW higher than 1 000), and the hydrolysates with higher ACE inhibitory activity were mainly those of molecular weight ranging from 200 to 600.
出处
《无锡轻工大学学报(食品与生物技术)》
CSCD
北大核心
2004年第4期50-55,共6页
Journal of Wuxi University of Light Industry
关键词
大豆生理活性肽
抗氧化性
ACE抑制活性
相对分子质量分布
soybean bioactive peptides
antioxidant activity
ACE inhibitory activity
molecular weight distribution