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Journal of Zhejiang University (Agriculture and Life Sciences)  2006, Vol. 32 Issue (5): 505-510    DOI:
    
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Published: 27 September 2006
CLC:  null  
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. null. Journal of Zhejiang University (Agriculture and Life Sciences), 2006, 32(5): 505-510.

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https://www.zjujournals.com/agr/     OR     https://www.zjujournals.com/agr/Y2006/V32/I5/505


Lactobacillus reuteri PYR8亚油酸异构酶基因在毕赤酵母中的表达  

以Lactobacillus reuteri PYR8菌株基因组DNA为模板,利用PCR方法扩增出亚油酸异构酶(linoleate isomerase,LI)基因,将其克隆至酵母表达载体pPIC9K中,电转化至毕赤酵母GS115中.重组菌株GS115/pPIC9K-LI经1%甲醇诱导后,SDS-PAGE电泳表明该基因在酵母中得到表达,即分子量约为67 kD的重组LI蛋白.经SP-Sepharose Fast Flow阳离子交换层析、Phenyl Sepharose Fast Flow疏水层析纯化获得了纯度为95%的重组LI蛋白样品.气相色谱分析表明,纯化的重组LI具有亚油酸异构酶的活性,酶的比活力为6.8 U·mg-1.
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