Department of Chemistry
We report herein the use of an exonuclease III and G-quadruplex probe to construct a G-quadruplex-based luminescence detection platform for Hg2+. Unlike common DNA-based Hg2+ detection methods, when using the dsDNA probe to monitor the hairpin formation, the intercalation of the dsDNA probe may be influenced by the distortion of dsDNA. This ‘mix-and-detect’ methodology utilized the G-quadruplex probe as the signal transducer and is simple, rapid, convenient to use and can detect down to 20 nM of Hg2+.
iridium(III), exonuclease III, G-quadruplex, mercury(II) ion
Source Publication Title
Science and Technology of Advanced Materials
National Institute for Materials Science
Link to Publisher's Edition
Wang, Wanhe, Tian-Shu Kang, Philip Wai Hong Chan, Jin-Jian Lu, Xiu-Ping Chen, Chung-Hang Leung, and Dik Lung Ma. "A label-free G-quadruplex-based mercury detection assay employing the exonuclease III-mediated cleavage of T–Hg2+–T mismatched DNA." Science and Technology of Advanced Materials 16.6 (2015): 065004.