Figure 2: (A) DNA sequence of acrydite-Hg-DNA and fluorescence signal generation for Hg2+ detection; (B) DNA-functionalized polyacrylamide hydrogel and interaction with Hg2+ and SYBR Green I produces a visual fluorescence signal; (C, D) Chemical reaction schemes of Hg2+ binding with thymine base pairs (C) and polyacrylamide in hydrogel (D) [32]. Reprinted with permission from ref. 32. Copyright (2010) American Chemical Society.