A hg(ii)-mediated “signal-on” electrochemical glutathione sensor

Abstract

We report the design and fabrication of a DNA-based electrochemical sensor for detection of glutathione. Sensor signaling relies on glutathione's ability to chelate mercury Hg(II), displacing it from the thymine–Hg(II)–thymine complex formed between the surface-immobilized DNA probes. Our results show that this sensor is sensitive and selective enough to be employed in saliva. © The Partner Organisations 2014.