酶法制备豆清液多肽工艺优化及其抗氧化活性研究Optimization of Enzymatic Preparation of Polypeptide from Soybean Supernatant and Its Antioxidant Activity
尹乐斌,刘丹,何平,廖聪,杨爱莲
摘要(Abstract):
为提高大豆蛋白资源的利用率,考察了不同蛋白酶(木瓜蛋白酶、菠萝蛋白酶、胃蛋白酶、风味蛋白酶)水解豆清液制备多肽,并选择风味蛋白酶进行工艺优化。以多肽得率为评价指标,探讨酶用量、酶解温度、初始pH和酶解时间对多肽产率的影响,并通过响应面优化提取工艺参数,确定了豆清液水解的最佳工艺条件为:酶用量0.09 g、温度54℃、pH 4.4、时间4 h,在此条件下多肽产率为71.10%;最后进行DPPH自由基清除率的测定。抗氧化实验结果表明,通过风味蛋白酶酶解制得的豆清多肽具有较好的抗氧化性,是优质抗氧化肽的良好来源。
关键词(KeyWords): 豆清液;风味蛋白酶;大豆多肽;响应面;抗氧化
基金项目(Foundation): 湖南省教育厅优秀青年项目(18B427);; 研究生科研创新项目(CX2019SY033);; 2019年湖南省普通高校青年骨干教师;; 邵阳学院“双一流”建设产学研合作平台(邵院通[2018]50号)
作者(Author): 尹乐斌,刘丹,何平,廖聪,杨爱莲
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