采用盐析法、重组蛋白A(HiTrapr Protein A Sepharose)亲和层析法分离纯化草鱼血清中的IgM,并通过SDS-PAGE及Western-blot技术对纯化蛋白的部分特性进行分析比较并制备兔抗IgM抗血清。结果表明:33%硫酸铵溶液可以沉淀血清中大部分蛋白,...采用盐析法、重组蛋白A(HiTrapr Protein A Sepharose)亲和层析法分离纯化草鱼血清中的IgM,并通过SDS-PAGE及Western-blot技术对纯化蛋白的部分特性进行分析比较并制备兔抗IgM抗血清。结果表明:33%硫酸铵溶液可以沉淀血清中大部分蛋白,但电泳条带仍较多,其中含有78kD和28kD的条带,因此仅可作为免疫球蛋白粗提的方法;而rProtein A亲和层析法所提蛋白则仅有上述重链(78kD)和轻链(28kD)。Western-blot显示,鼠抗人Ig抗体可与78kD及28kD条带发生发应。rProtein A亲和法提纯蛋白的纯度较高,但含量较低,条带较淡,仅可作为实验室小量提纯草鱼IgM的有效方法。将提纯的蛋白免疫实验兔后可制得效价高达1:25600的兔抗鱼IgM血清,并测得血清蛋白总量和IgM含量分别为25.87mg和4.5mg,IgM占血清蛋白总量的17.39%。本实验所采用的蛋白A亲和层析法提取草鱼血清IgM可以方便、快捷地获得高纯度的产物,适合在实验室中纯化鱼类IgM。同时本研究所制备的兔抗草鱼IgM血清也为今后的相关研究工作打下基础。展开更多
[Objective] A study on separation process of lysozyme, ovotransferrin and ovalbumin from egg white. [Method] The proteins were separated by ammonium sul-fates and ion-exchange chromatography. Purity of the proteins wa...[Objective] A study on separation process of lysozyme, ovotransferrin and ovalbumin from egg white. [Method] The proteins were separated by ammonium sul-fates and ion-exchange chromatography. Purity of the proteins was assayed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). [Result] The results showed that the proteins were electrophoresis-pure. The specific activity of lysozyme was increased from 144.13 to 2 235 U/mg, and purification factor was 15-fold. Lysozyme recovery rate was estimated to be 15.76%. Bacteriostasis rate of ovotransferrin was 48.84%. [Conclusion] The procedure for separating lysozyme, ovotransferrin and ovalbumin from egg white was simple, fast, low-cost and suitable for industrilization.展开更多
建立从小鼠腹水中纯化抗乙肝核心抗原(HBcAg)单克隆抗体的一步层析法。将含抗HBcAg单克隆抗体的腹水经离心、过滤和缓冲溶液变换预处理后,采用HiTrap rProtein A FF亲和层析柱纯化,并探讨了上样缓冲液的pH值和NaCl浓度,洗脱液的种类、p...建立从小鼠腹水中纯化抗乙肝核心抗原(HBcAg)单克隆抗体的一步层析法。将含抗HBcAg单克隆抗体的腹水经离心、过滤和缓冲溶液变换预处理后,采用HiTrap rProtein A FF亲和层析柱纯化,并探讨了上样缓冲液的pH值和NaCl浓度,洗脱液的种类、pH值以及体积流量对抗体纯度及回收率的影响,纯化后的单克隆抗体的生物学活性用间接ELISA法测定。结果显示,以pH7.0,20mmol/LPB+3.0mol/LNaCl为上样缓冲液,0.1mol/LGly-HCl为洗脱液,体积流量为5.0ml/min时,抗HBcAg单抗的纯度大于95%,回收率达75%,纯化后的单克隆抗体的生物学活性没有下降。本研究建立了蛋白A亲和层析法纯化抗HBcAg单克隆抗体的方法,其操作简便、快速而且效果良好。展开更多
文摘采用盐析法、重组蛋白A(HiTrapr Protein A Sepharose)亲和层析法分离纯化草鱼血清中的IgM,并通过SDS-PAGE及Western-blot技术对纯化蛋白的部分特性进行分析比较并制备兔抗IgM抗血清。结果表明:33%硫酸铵溶液可以沉淀血清中大部分蛋白,但电泳条带仍较多,其中含有78kD和28kD的条带,因此仅可作为免疫球蛋白粗提的方法;而rProtein A亲和层析法所提蛋白则仅有上述重链(78kD)和轻链(28kD)。Western-blot显示,鼠抗人Ig抗体可与78kD及28kD条带发生发应。rProtein A亲和法提纯蛋白的纯度较高,但含量较低,条带较淡,仅可作为实验室小量提纯草鱼IgM的有效方法。将提纯的蛋白免疫实验兔后可制得效价高达1:25600的兔抗鱼IgM血清,并测得血清蛋白总量和IgM含量分别为25.87mg和4.5mg,IgM占血清蛋白总量的17.39%。本实验所采用的蛋白A亲和层析法提取草鱼血清IgM可以方便、快捷地获得高纯度的产物,适合在实验室中纯化鱼类IgM。同时本研究所制备的兔抗草鱼IgM血清也为今后的相关研究工作打下基础。
基金Supported by Lishui Science and Technology Bureau Company-College Collaboration Program(20080410)~~
文摘[Objective] A study on separation process of lysozyme, ovotransferrin and ovalbumin from egg white. [Method] The proteins were separated by ammonium sul-fates and ion-exchange chromatography. Purity of the proteins was assayed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). [Result] The results showed that the proteins were electrophoresis-pure. The specific activity of lysozyme was increased from 144.13 to 2 235 U/mg, and purification factor was 15-fold. Lysozyme recovery rate was estimated to be 15.76%. Bacteriostasis rate of ovotransferrin was 48.84%. [Conclusion] The procedure for separating lysozyme, ovotransferrin and ovalbumin from egg white was simple, fast, low-cost and suitable for industrilization.
文摘建立从小鼠腹水中纯化抗乙肝核心抗原(HBcAg)单克隆抗体的一步层析法。将含抗HBcAg单克隆抗体的腹水经离心、过滤和缓冲溶液变换预处理后,采用HiTrap rProtein A FF亲和层析柱纯化,并探讨了上样缓冲液的pH值和NaCl浓度,洗脱液的种类、pH值以及体积流量对抗体纯度及回收率的影响,纯化后的单克隆抗体的生物学活性用间接ELISA法测定。结果显示,以pH7.0,20mmol/LPB+3.0mol/LNaCl为上样缓冲液,0.1mol/LGly-HCl为洗脱液,体积流量为5.0ml/min时,抗HBcAg单抗的纯度大于95%,回收率达75%,纯化后的单克隆抗体的生物学活性没有下降。本研究建立了蛋白A亲和层析法纯化抗HBcAg单克隆抗体的方法,其操作简便、快速而且效果良好。