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Universal platform for sensitive and label-free nuclease assay based on conjugated polymer and DNA/intercalating dye complex.

Authors
Type
Published Article
Journal
Langmuir
1520-5827
Publisher
American Chemical Society
Publication Date
Volume
26
Issue
6
Pages
4540–4545
Identifiers
DOI: 10.1021/la904173j
PMID: 19958006
Source
Medline
License
Unknown

Abstract

By taking advantage of the large signal amplification through efficient fluorescence resonance energy transfer (FRET) from the conjugated polymer to the intercalating dye mediated by DNA, a new strategy for nuclease assay has been developed using conjugated polymer and DNA/intercalating dye complex. The discrimination of DNA before or after digestion by nuclease denotes the universal application of the approach, in which either dsDNA or ssDNA substrates could be used for detecting nuclease activity. This method can be extended to most nucleases by simply changing the substrate DNA. The present method is label-free, rapid, and highly sensitive, with a detection limit much better or at least comparable to previous reports. In addition, this assay is easy to implement for visual detection with the assistance of a UV transilluminator. We reason that a similar strategy can be adopted for the detection of other analytes.

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