食品科学 ›› 2008, Vol. 29 ›› Issue (3): 268-271.

• 生物工程 • 上一篇    下一篇

长寿老人体内分离的鼠李糖乳杆菌RAPD体系优化研究

 顾瑞霞, 蔡敬敬, 王琴, 杨振泉, 任远庆   

  1. 扬州大学乳品研究所; 克拉玛依农牧科学技术研究所; 克拉玛依农牧科学技术研究所 江苏扬州225001; 江苏扬州225001; 新疆克拉玛依834000;
  • 出版日期:2008-03-15 发布日期:2011-08-24

Study on Lactobacillus rhamnosus RAPD System Optimization from Macrobian

 GU  Rui-Xia, CAI  Jing-Jing, WANG  Qin, YANG  Zhen-Quan, REN  Yuan-Qing   

  1. 1.Institute of Diary Science and Technology, Yangzhou University, Yangzhou 225001, China; 2.Institute of Agriculture and Farming Science and Technology of Kelamayi, Kelamayi 834000, China
  • Online:2008-03-15 Published:2011-08-24

摘要: 采用CTAB改良法提取11株鼠李糖乳杆菌的基因组DNA,对其完整性进行了测定,并以此为模板进行RAPD反应。优化的RAPD反应体系为:模板50ng,Taq酶2U,dNTPs 3.25mmol/L,随机引物5mmol/L,10×PCR缓冲液2.5μl,Mg2+7.5mmol/L,反应总体积为25μl;PCR扩增参数:93℃2min,36℃1min,72℃2min1次循环;93℃1min,36℃1min,72℃2min,40次循环;93℃1min,36℃1min,72℃10min1次循环。

关键词: 鼠李糖乳杆菌, RAPD, 优化

Abstract:  An improved DNA extraction protocol with CTAB was developed for Lactobacillus rhamnosus. DNA was extracted successfully from the samples of 11 strains and was suitable for RAPD analysis. The optimization of a 25μl RAPD was determined as followed: template 50 ng, 2 U TaqDNA polymerase, 3.25 mmol/L dNTPs for each, 5 mmol/L primer, 2.5μl 10×PCR buffer, and 7.5 mmol/L Mg2+. The reaction program was devised for one cycled at 93 ℃ 2 minutes, 36 ℃ 1 minutes, 72 ℃ 2 minutes, which is followed by 40 cycles, each 1 minutes at 93 ℃, 1 minute at 36 ℃, 2 minutes at 72 ℃, and a final extension at 93 ℃ 2 minutes, 36 ℃ 1 minutes, 72 ℃ 10 minutes.

Key words: Lactobacillus rhamnosus, RAPD, optimalization