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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Searching for Electrochemical Reduction Mechanism of Azidophenyl DNA Labels
 Daňhel, Aleš ; Trošanová, Zuzana ; Balintová, Jana ; Hocek, Michal ; Fojta, Miroslav
This contribution brings new information to sporadic scientific results concerned to electrochemical reduction of aromatic azides. Selected compounds used as perspective DNA labels or their structural constituents such as, 4-azidophenyltrifluoroboronic acid, 4-azidophenyl modified deoxycytidine and next probable analogous compounds and/or products of their reduction, were voltammetrically studied and compared to each other in order to reveal a mechanism of their electrochemical reduction at mercury electrodes in aqueous media. Preliminary results obtained by cyclic voltammetry at mercury and carbon based electrodes and by mass spectrometry of the products isolated from batch electrolysis on mercury pool by preparative chromatography are discussed.
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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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