食品科学 ›› 2007, Vol. 28 ›› Issue (7): 48-53.

• 基础研究 • 上一篇    下一篇

强阳离子交换色谱法从牛初乳中分离纯化乳铁蛋白的研究

 卢蓉蓉, 许时婴, 王璋, 杨瑞金   

  1. 江南大学食品科学与技术国家重点实验室; 江南大学食品学院; 江南大学食品科学与技术国家重点实验室 江苏无锡214122江南大学食品学院; 江苏无锡214122; 江苏无锡214122江南大学食品学院;
  • 出版日期:2007-07-15 发布日期:2011-10-24

Purification of Lactoferrin from Bovine Colostrum with Strong Cation Exchange Chromatography on Pilot Scale

 LU  Rong-Rong, XU  Shi-Ying, WANG  Zhang, YANG  Rui-Jin   

  1. 1.State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; 2.School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
  • Online:2007-07-15 Published:2011-10-24

摘要: 本实验研究了离子交换色谱技术大规模纯化乳铁蛋白的色谱条件。选用的SP Sepharose Fast Flow离子交换剂对乳铁蛋白有很好的吸附选择性,洗脱速度可达到2L/h。以pH值为7.7~8.0,10mmol/L的磷酸盐为起始缓冲液,通过改变离子强度进行分步洗脱。先采用0.5mol/L的NaCl溶液选择性洗脱分泌型免疫球蛋白A和乳过氧化物酶组分,再采用1mol/L的NaCl洗脱LF组分。经SDS-PAGE测定,所得乳铁蛋白组分显示为单一区带,相对分子质量为80400Da。经等点聚焦测定,所得乳铁蛋白的等电点为8.65。中试生产的精制品中乳铁蛋白的纯度和回收率分别为94.20%和75.45%。

关键词: 乳铁蛋白, 分离纯化, 强阳离子交换色谱, 中试规模

Abstract: A stepwise procedure for purification of lactoferrin (LF) extracted from bovine colostrum by ion exchange chromatography on a pilot scale was investigated. SP Sepharose Fast Flow (SP Sepharose FF) of excellent absorption speciality for LF, was chosen as the ion exchanger with elution rate of 2 L/h. 0.5 mol/L NaCl aqueous solution was used to elute the secretory immunoglobulin A and lactoperoxidase. Then, lactoferrin was eluted with 1.0 mol/L NaCl aqueous buffer. Lactoferrin fraction is shown as a single band in SDS-PAGE with molecular weight of 80400 Da. The isoelectric point of lactoferrin is 8.65 determined by isoelectric focusing. The purity of refined LF on pilot production is 94.20% with a yield of 75.45%.

Key words: lactoferrin, purification, strong cation exchange chromatography, pilot scale