食品科学 ›› 2009, Vol. 30 ›› Issue (17 ): 204-207.doi: 10.7506/spkx1002-6630-200917047

• 生物工程 • 上一篇    下一篇

辣根过氧化物酶酶标抗原催化α - 萘酚微量热

陈 佳,李红梅,徐 斐* ,李 琳,戈铭芝   

  1. 上海理工大学食品与生物技术研究所
  • 收稿日期:2009-05-20 出版日期:2009-09-01 发布日期:2014-04-14
  • 通讯作者: 徐 斐* E-mail:xufei.first@263.net
  • 基金资助:

    上海市教委重点攻关项目(072284)

Microcalorimetric Study of Enzymatic Reaction of α-Naphthol Using Horseradish Peroxidase Labeled Clenbuterol Antigen

CHEN Jia,LI Hong-mei,XU Fei*,LI Lin,GE Ming-zhi   

  1. Institute of Food and Biotechnology, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2009-05-20 Online:2009-09-01 Published:2014-04-14
  • Contact: XU Fei*, E-mail:xufei.first@263.net

摘要:

采用戊二醛法将盐酸克伦特罗(CL)和辣根过氧化物酶(HRP)偶联制备不同偶联率的酶标抗原,利用MicroDSC Ⅲ微量热仪测定不同偶联率的酶标抗原催化α- 萘酚放热量。结果表明:采用戊二醛法进行偶联HRP 的酶活损失微弱,且在相同CL 浓度下偶联率低的酶标抗原放热量较大。在同等条件下,0.15mol/L NaCl 反应体系中酶促反应的放热量优于0.1mol/L PBS 反应体系,在0.15mol/L NaCl 缓冲体系下,酶活力为2U 时催化放热的最佳底物浓度为20mmol/L。

关键词: 盐酸克伦特罗, 辣根过氧化物酶标记, 微量热

Abstract:

Clenbuterol (CL) was conjugated to horseradish peroxidase using glutaraldehyde at different ratios and a Micro DSC Ⅲ calorimeter was adopted to measure energy released during hydrolysis of α-naphthol by horseradish peroxidase labeled CL antigen with different conjugation ratios. A slight decrease was found in enzyme activity and the enzyme labeled antigen with lower conjugation degree showed a higher energy change under the same CL concentration. Under the same condition, the energy released during enzymatic reaction in 0.15 mol/L NaCl buffer was higher than that in 0.1 mol/L PBS buffer. In 0.15 mol/L NaCl buffer, the optimal concentration of α-naphthol was 20 mmol/L when the enzyme activity was 2 U.

Key words: clenbuterol, horseradish peroxidase labeled antigen, microcalorimetry

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