|
A蛋白基因在枯草杆菌R25及地衣芽孢杆菌NM105中的表达
|
|
【医学毕业论文下载】张尤新 王桂忱 章银梅 汤懋盓 中国图书分类号 R392.11 摘 要 目的:测定A蛋白基因在R25及NM105中的表达情况。方法:根据A蛋白基因产物——A蛋白能特异地与许多动物的免疫球蛋白的Fc段结合这一特性,采用ELISA检测法测定。结果:在细菌生长对数期,表达量与酶活性都在快速上升,在细菌生长平台期,表达量呈下降趋势。加中性蛋白酶抑制剂,使表达量提高了46%,低酶活性培养基的表达量是LB培养基的7.4倍,在碱性蛋白酶缺失的R25中的表达量是NM105的1.6倍。结论:A蛋白基因表达量与胞外蛋白酶活性关系极为密切。 关键词 A蛋白基因 A蛋白 表达 枯草杆菌 Expression of protein A gene in R25 and NM105ZHANG You-Xin,WANG Gui-Chen,ZHANG Yin-Mei et al.Institute of Genetics,Academia Sinica,Beijing 100101 Abstract Objective:Determined the expression condition of protein A in R25 and NM105.Methods:By ELISA and based on specific property that the protein A can be specifically combined with Fc fragment of immunoglobulin of many animals.Results:The protein A gene expression degree and protease activity both increased rapidly in logarithmic growth phase,and the protein A gene expression degree can raise 46% by adding neutral protease inh
|
|
|