Electrochemical Aptamer Scaffold Biosensors for Detection of Botulism and Ricin Proteins
Electrochemical DNA (E-DNA) biosensors enable the detection and quantification of a variety of molecular targets, including oligonucleotides, small molecules, heavy metals, antibodies, and proteins. Here we describe the design, electrode preparation and sensor attachment, and voltammetry conditions needed to generate and perform measurements using E-DNA biosensors against two protein targets, the biological toxins ricin and botulinum neurotoxin. This method can be applied to generate E-DNA biosensors for the detection of many other protein targets, with potential advantages over other systems including sensitive detection limits typically in the nanomolar range, real-time monitoring, and reusable biosensors.
Key wordsBiosensors Toxins Electrochemical Aptamer Botulism Ricin Voltammetry E-DNA Gold electrodes Proteins
This work would not be possible without ideas from Kevin Plaxco, University of California Santa Barbara, and Ryan White, University of Maryland Baltimore County. Support for this work was provided by the Metropolitan State University of Denver’s College of Letters, Arts, and Sciences Dean’s office, Provost’s office, and the Applied Learning Center.
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