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Novel Reactive Groups for Modification DNA by Oxoosmium Complexes
Havran, Luděk ; Vidláková, Pavlína ; Špaček, Jan ; Hermanová, Monika ; Fojta, Miroslav
DNA is naturally electroactive moleclue producing several intrinsie voltammetric signals. Some of them found appliction in electrochemical analysis of DNA interactions and damage. In particular types of applictaions is a suitable use DNA labelling by redox active tags to increase selectivity and sensitivity of analysis.One type of long-term used tags are complexes of osmium tetroxide with nittrogen ligunds (Os,L). These complexes preferentially react with pyrimidines in single stand DNA producing electractive adducts. primary reaction site for Os,L is C-C double bond in pyrimidine nucleobases. In this contribution will be presented results acquired with DNA containing chemically modified nuclebase.

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