申请人:Arizona Board of Regents on behalf of Arizona State University
公开号:US10330632B2
公开(公告)日:2019-06-25
An system for recognition of a translocating polymeric target molecule includes a device having at least one constriction that is sized to permit translocation of only a single copy of the molecule. A pair of spaced apart sensing electrodes border the constriction, which may be a nanopore. The first electrode is connected to a first affinity element and the second electrode is connected to a second affinity element. Each affinity element may connected to its corresponding electrode via one or more intermediary compounds, such as a linker molecule and/or an electrode attachment molecule. The first and second affinity elements are configured to temporarily form hydrogen bonds with first and second portions of the target molecule as the latter passes through the constriction. During translocation, the electrodes affinity elements and first and second portions of the target molecule complete an electrical circuit and allow a measurable electrical current to pass between the first and second electrodes. The time-varying nature of this electrical current, and the specific affinity elements employed, allow one to characterize the target molecule.
一种用于识别易位聚合目标分子的系统包括一个装置,该装置至少有一个收缩口,其大小只允许分子的一个拷贝易位。一对间隔开的传感电极位于收缩处的边缘,收缩处可以是一个纳米孔。第一电极与第一亲和元件相连,第二电极与第二亲和元件相连。每个亲和元件可通过一个或多个中间化合物(如连接分子和/或电极附着分子)与其相应的电极相连。当目标分子通过收缩时,第一和第二亲和元件被配置为与目标分子的第一和第二部分暂时形成氢键。在转位过程中,电极亲和元件与目标分子的第一和第二部分完成一个电路,并允许可测量的电流在第一和第二电极之间通过。这种电流的时变性和所使用的特定亲和元件,使我们能够确定目标分子的特征。