title: Electrochemical biosensors for DNA analysis.
abstract: Over the past few years, progress in electrochemical biosensors for DNA analysis is outstanding. This article briefly reviewed the principals of such biosensors, followed by a selection of topics that are of particular current interest. Selectivity and sensitivity are the two major challenges in DNA analysis. The former can be accomplished using peptide nucleic acids as probes, or relying on the DNA-mediated electron transfer. Special emphasis has been given to the efforts for high sensitivity, involving combination with polymerase chain reaction techniques, enzyme-labeled methods, direct label-free detection and nano-based techniques.
authors.affiliation: Key Laboratory of Analytical Chemistry for Life Science (Ministry of Education of China), Department of Chemistry, Nanjing University, Nanjing 210093, PR China. hxju@nju.edu.cn <hxju@nju.edu.cn>
authors.forename: Huangxian
authors.initials: H
authors.lastname: Ju
authors.forename: Hongtao
authors.initials: H
authors.lastname: Zhao
mesh_terms: D015374:Biosensing Techniques; D004247:DNA / Q000032:analysis*; D004277:DNA, Single-Stranded / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D005821:Genetic Techniques; D020135:Peptide Nucleic Acids / Q000737:chemistry; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D012680:Sensitivity and Specificity
chemical_list: D004277:DNA, Single-Stranded; D020135:Peptide Nucleic Acids; D004247:DNA