Abstract
The base pair stack of double helical DNA has proven to be an effective medium for charge transport. The π-stacked DNA base pairs can mediate charge transport (CT) chemistry over distances as long as 20 nm, and the reaction is exquisitely sensitive to DNA sequence-dependent conformation and dynamics. This sensitivity to perturbations in DNA structure and base pair stacking makes DNA-mediated charge transport chemistry an ideal methodology for the electrical detection of base mismatches, lesions, and protein binding. Efforts toward expanding the scope of electrochemistry at DNA-modified surfaces for biosensing applications are presented here.
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