Simultaneous Multiselective Spectroelectrochemical Sensing of the Interaction between Protein and Its Ligand Using the Redox Dye Nile Blue as a Label
作者:Hideki Kuramitz、Aigars Piruska、H. Brian Halsall、Carl J. Seliskar、William R. Heineman
DOI:10.1021/ac801289t
日期:2008.12.15
labeled ligand were investigated using various ion-exchange films, such as perfluorosulfonated ionomer (Nafion), Nafion-silica, poly(acrylic acid) (PAA)-silica, poly(styrenesulfonic acid) (PSSA)-silica, and heparin-silica films, which were spin-coated on the ITO electrode. The optical signal was monitored to follow the accumulation of labeled ligand in the film and its electrochemical modulation. The signal
使用抗生物素蛋白-生物素和17β-雌二醇-抗雌二醇抗体,证明了一种基于光谱电化学方法的蛋白质及其配体的新结合测定法。传感器由涂在由铟锡氧化物(ITO)组成的光学透明电极(OTE)上的选择性膜组成。衰减全反射(ATR)用于光学检测。使用电活性染料尼罗蓝(NB)标记的配体检测配体与蛋白质的结合事件。使用各种离子交换膜,例如全氟磺化离聚物(Nafion),Nafion二氧化硅,聚丙烯酸(PAA)二氧化硅,聚苯乙烯磺酸(PSSA)-,研究了NB和标记配体的光谱电化学行为。二氧化硅和肝素二氧化硅薄膜,将它们旋涂在ITO电极上。监测光信号以追踪膜中标记的配体的积累及其电化学调制。来自标记的配体的信号基于电荷选择性分配,所选的电解电势和用于测量吸光度的特定波长,具有三种选择性模式。标记的配体与其蛋白质之间的相互作用通过标记的配体的光学响应变化的减少来观察,表明标记的配体与蛋白质的特异性结合。