半抗原-载体蛋白偶联物的三种电泳鉴定方法

【目的】建立一种简单方便的半抗原-载体蛋白偶联物电泳鉴定方法。【方法】选用SDS-PAGE、非变性琼脂糖凝胶电泳、高效毛细管区带电泳3种方法对载体蛋白、偶联剂变性的载体蛋白、半抗原-载体蛋白进行比较鉴定,同时与光谱法结果比较。【结果】对分子量差异较小的载体蛋白和半抗原-载体蛋白偶联物,SDS-PAGE不能有效分辨;但偶联前后载体电荷有变化时,非变性琼脂糖凝胶电泳却能有效分辨游离的载体蛋白和半抗原-载体蛋白偶联物,相对SDS-PAGE表现出更高的分辨灵敏度;毛细管区带电泳能高效分辨载体和半抗原-载体蛋白偶联物,结果直观,但需较贵重的专用仪器。琼脂糖电泳和毛细管电泳法与可见-紫外光谱法鉴定结果一致。【结论】3种电泳方法各有优缺点,非变性凝胶电泳简便、廉价、有效,较适合普通实验室使用。

Identification of Hapten-Carrier Protein Conjugate by Three Electrophoresis Methods

ObjectiveTo establish a simple electrophoresis characterization method for hapten-carrier protein bioconjugate. Method SDS-PAGE, nondenaturing agarose gel electrophoresis and high performance capillary electrophoresis were employed and compared with spectrum method. Result The result showed that SDS-PAGE was not a sensitive candidate method to differentiate carrier protein from bioconjugate when both proteins have less molecular weight difference, but nondenaturing gel electrophoresis was a better alternati...