食品科学 ›› 1999, Vol. 20 ›› Issue (1): 22-25.doi: 10.7506/spkx1002-6630-199901007

• 基础研究 • 上一篇    下一篇

木瓜蛋白酶对大豆分离蛋白的水解作用

 黄惠华,  何铁剑,  许南燕, 梁汉华   

  1.  华南理工大学食品与生物工程学院; 香港理工大学应用生物与化学技术系
  • 出版日期:1999-01-15 发布日期:2011-12-04

 HUANG  Hui-Hua,   He-Tie-Jian,   Xu-南Yan, LIANG  Han-Hua   

  • Online:1999-01-15 Published:2011-12-04

摘要:  木瓜蛋白酶对大豆分离蛋白的酶解结果表明:木瓜蛋白酶的反应动力学参数km值为0.34%,酶的最适反应pH值为7.5,在pH9.0的碱性条件下有较好的适应性。酶的最大反应温度为60℃,在此温度条件下,温浴180min仍然保持70%的酶活。2.0%-2.5%的大豆分离蛋白溶液经木瓜蛋白酶水解后,丝氨酸、苏氨酸、脯氨酸、组氨酸、蛋氨酸等游离氨基酸含量明显增加,大豆多肽每100m提高92-94mg,等电点分布范围变宽,由原来大豆分离蛋白的pH3.1~4.3变为pH3.1~5.5。

关键词: %%大豆多肽, 木瓜蛋白酶, 大豆分离蛋白

Abstract:  The hydrolysis on isolated soybean protein with papain show that the km value of papain with isolated soybean protein as substrate was 3.4%. The optimum temperature and pH value was 60℃ and pH7.5.papain was adaptable to conditions of 60℃ and pH9.0. Peptide were released with increment of 92~94mg’100mlwhile the Solution of isolated soybean protein with 2.0~2.5% was hydrolyzed by papain. And the isoelectric points of the peptides were ranged from pH3.1 to pH5.5.

Key words:  , peptide of soybean papain Isolated soybean protein;