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- W2560142008 abstract "The toxic plant protein ricin is a potential agent for criminal or bioterrorist attacks due to the wide availability and relative ease of preparation. Herein, we developed a novel strategy for the detection of ricin B-chain (RTB) based on isothermal strand-displacement polymerase reaction (ISDPR) by using aptamer as a recognition element and graphene oxide (GO) as a low background platform. In this method, ricin-binding aptamer (RBA) hybridized with a short blocker firstly, and then was immobilized on the surface of streptavidin-coated magnetic beads (MBs). The addition of RTB could release the blocker, which could hybridize with the dye-modified hairpin probe and trigger the ISDPR, resulting in high fluorescence intensity. In the absence of RTB, however, the fluorescence of the dye could be quenched strongly by GO, resulting in the extremely low background signal. Thus, RTB could be sensitively detected by the significantly increased fluorescence signal. The linear range of the current analytical system was from 0.75 μg/mL to 100 μg/mL and the limit of detection (3σ) was 0.6 μg/mL. This method has been successfully utilized for the detection of both the RTB and the entire ricin toxin in real samples, and it could be generalized to any kind of target detection based on an appropriate aptamer." @default.
- W2560142008 created "2016-12-16" @default.
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- W2560142008 date "2017-05-01" @default.
- W2560142008 modified "2023-09-25" @default.
- W2560142008 title "A graphene oxide-based strand displacement amplification platform for ricin detection using aptamer as recognition element" @default.
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- W2560142008 doi "https://doi.org/10.1016/j.bios.2016.12.010" @default.
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