Mutation detection by electrocatalysis at DNA-modified electrodes

  title={Mutation detection by electrocatalysis at DNA-modified electrodes},
  author={Elizabeth M Boon and Donato M. Ceres and Thomas G. Drummond and Michael G Hill and Jacqueline K Barton},
  journal={Nature Biotechnology},
Detection of mutations and damaged DNA bases is important for the early diagnosis of genetic disease. Here we describe an electrocatalytic method for the detection of single-base mismatches as well as DNA base lesions in fully hybridized duplexes, based on charge transport through DNA films. Gold electrodes modified with preassembled DNA duplexes are used to monitor the electrocatalytic signal of methylene blue, a redox-active DNA intercalator, coupled to [Fe(CN)6]3−. The presence of mismatched… CONTINUE READING

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