食品科学 ›› 2008, Vol. 29 ›› Issue (5): 385-388.

• 分析检测 • 上一篇    下一篇

Tricine-SDS-PAGE电泳检测蛋清肽分子量的研究

 孙波, 迟玉杰, 徐宁, 武贤峰   

  1. 东北农业大学食品学院; 东北农业大学食品学院
  • 出版日期:2008-05-15 发布日期:2011-08-26

Study on Tricine-SDS-PAGE Method Detecting Albumen Polypeptides Molecular Weight

 SUN  Bo, CHI  Yu-Jie, XU  Ning, WU  Xian-Feng   

  1. College of Food,Northeast Agricultural University
  • Online:2008-05-15 Published:2011-08-26

摘要: 本研究利用Alcalase酶,在pH8.21、温度60℃、酶解60min的条件下制得蛋清肽,分别采用凝胶色谱法和Tricine-SDS-PAGE法测定其分子量。结果表明:49.5%T、6%C的分离胶溶液中添加6mol/L尿素的电泳效果好于添加10%(V/V)的甘油。Tricine-SDS-PAGE方法可以准确的测定酶解后生成蛋清肽的分子量,蛋白标准品的线性回归系数r=0.9946,与凝胶色谱法相比,平均相对误差率为0.5%。Tricine-SDS-PAGE电泳检测蛋清肽的分子量具有简单、快速、直观的特点。

关键词: 酶解, 分子量, 凝胶电泳

Abstract: In this study,molecular mass weight of egg white was determined by gel chromatography and Tricine-SDS-PAGE separately.Egg white peptides were enzymolysised by Alcalase and the optimal enzymolysising parameters were as follow,pH 8.0,reaction temperature 60 ℃ and enzymolysising time 60 min.The results showed that added 6mol/L urea into separation gel(T=49.5%,C=6%)was better than 10%(V/V)glycerin added.Molecular mass weight of egg white peptides which was enzymolysised was accurately determined by Tricine-SDS-PAGE electrophoresis.Linear regression coefficient(r) of marker was 0.9946,average relative error rate was 0.5% by compared with gel chromatography.Tricine-SDS-PAGE electrophoresis was a simple,fast,direct-viewing method to determine the mass weight of egg white peptides.

Key words: enzymolysis, molecular mass weight, gel electrophoresis