Signal-on electrochemical Y or junction probe detection of nucleic acid |
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Authors: | Shen Zuliang Nakayama Shizuka Semancik Steve Sintim Herman O |
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Institution: | Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA. |
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Abstract: | A methylene-blue (MB)-labeled molecular beacon junction probe allows for a signal-on electrochemical detection of nucleic acids via target recycling using endonucleases. Electron transfer is reduced when the MB is intercalated in the stem of the molecular beacon, but then electron transfer from MB to a gold electrode is enhanced upon cleavage of the junction probe due to increased probability of MB approaching the electrode when attached to the more flexible ssDNA. |
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