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AFM study of adsorption of protein A on a poly(dimethylsiloxane) surface

机译:AFM研究蛋白A在聚二甲基硅氧烷表面的吸附

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In this paper, the morphology and kinetics of adsorption of protein A on a PDMS surface is studied by AFM. The results of effects of pH, protein concentration and contact time of the adsorption reveal that the morphology of adsorbed protein A is significantly affected by pH and adsorbed surface concentration, in which the pH away from the isoelectric point (IEP) of protein A could produce electrical repulsion to change the protein conformation, while the high adsorbed surface protein volume results in molecular networks. Protein A can form an adsorbed protein film on PDMS with a maximum volume of 2.45 x 10~(-3)μm~3. This work enhances our fundamental understanding of protein A adsorption on PDMS, a frequently used substrate component in miniaturized immunoassay devices.
机译:本文利用原子力显微镜研究了蛋白A在PDMS表面的吸附形态和动力学。 pH,蛋白质浓度和吸附接触时间的影响结果表明,吸附的蛋白质A的形态受到pH和吸附的表面浓度的显着影响,其中pH值可以远离蛋白质的等电点(IEP)产生。电排斥作用改变蛋白质的构象,而高吸附的表面蛋白质体积导致分子网络。蛋白质A可以在PDMS上形成最大吸附量为2.45 x 10〜(-3)μm〜3的蛋白质膜。这项工作增强了我们对PDMS上蛋白质A吸附的基本理解,PDMS是小型化免疫测定设备中常用的底物成分。

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