食品科学 ›› 2010, Vol. 31 ›› Issue (1): 117-122.doi: 10.7506/spkx1002-6630-201001028

• 基础研究 • 上一篇    下一篇

玉米蛋白粉水解产物的分离及其抗氧化活性研究

李鸿梅1,杨 锐1,于 雷1,张学忠2   

  1. 1.吉林农业大学食品科学与工程学院 2.吉林大学 分子酶学与工程教育部重点实验室
  • 收稿日期:2009-04-10 出版日期:2010-01-01 发布日期:2014-05-19
  • 通讯作者: 李鸿梅 E-mail:rainbowly71@sina.com

Separation and Antioxidant Activity of Corn Gluten Meal Hydrolysate

LI Hong-mei1,YANG Rui1,YU Lei1,ZHANG Xue-zhong2   

  1. (1. College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China;
    2. Key Laboratory of Molecular Enzymology and Engineering, Ministry of Education, Jilin University, Changchun 130021, China)
  • Received:2009-04-10 Online:2010-01-01 Published:2014-05-19
  • Contact: LI Hong-mei1, E-mail:rainbowly71@sina.com

摘要:

以碱性蛋白酶做催化剂水解玉米蛋白粉,水解产物精制后,采用Sephedax G-15 和G-10 葡聚糖凝胶层析法及高效液相层析法进行分离纯化。以α- 生育酚为阳性对照,研究水解产物及其分离组分对DPPH 自由基的清除活性和对亚油酸自氧化的抑制作用,同时测定它们的还原力。采用邻苯三酚自氧化法研究它们对超氧阴离子自由基的清除作用。结果表明,抗氧化活性最高的组分是经Sephedax G-10 层析法分离得到的组分Ⅱ。组分Ⅱ的分子量分布范围在400~700D 之间,富含谷氨酸、丙氨酸、亮氨酸、组氨酸、脯氨酸和苯丙氨酸。

关键词: 玉米蛋白粉, 分离纯化, 清除自由基活性, 抗氧化活性

Abstract:

Corn gluten meal was hydrolyzed by proteolysis with alkaline protease and the refined hydrolysate was then separated and purified by Sephadex G-15 and G-10 column chromatographic and preparative HPLC methods. With α-tocopherol as a positive control, the hydrolysate and its fractions were evaluated for antioxidant activity by DPPH radical scavenging assay, linoleic acid auto-oxidation inhibition assay, ferric reducing/antioxidant power (FRAP) assay and superoxide anion scavenging assay based on pyrogallol auto-oxidation method. Results revealed that fraction II eluted from Sephadex G-10 column exhibited the highest antioxidant activity, a relative molecular mass distributed in range of 400 to 700 D detected by MS and an amino acid composition mainly consisting of glutamic acid, alanine, leucine, histidine, proline and phenylalanine.

Key words: corn gluten meal, separation and purification, free radical scavenging activity, antioxidant activity

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