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Redox DNA Labeling - from Simple DNA Detection by Osmium Tetroxide Complexes Modification to Ratiometric Sequence Analysis
Havran, Luděk ; Balintová, Jana ; Vidláková, Pavlína ; Macíčková-Cahová, Hana ; Pivoňková, Hana ; Hocek, Michal ; Fojta, Miroslav
DNA is electroactive molecule producing analytically useful intrinsic voltammetric signals. For some applications is a useful use redox active tag to improve specificity of the analysis. One from approaches how to prepare DNA bearing redox label is its modification by complexes of osmium tetroxide with nitrogen ligands. This method find wide used in highly sensitive DNA detection and in development of electrochemical DNA hybridization sensors. Another possibility for preparation of redox labeled DNA is incorporation of redox tags modified deoxynucleotide triphosphates by DNA polymerases. In this contribution will be demonstrated application of various redox labels in electrochemical analysis of DNA.

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