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1 Acta Biochimica Polonica

1 1996

1 Guschlbauer W.

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Small is beautiful: major modifications in DNA structure or dynamics by small substituents or ligands

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Guschlbauer W.

nr 1

This short review assembles the contributions of the author's laboratory to the structural aspects of DNA. DNA was modified by small ligands and/or substituents. There are three aspects to this work: a) Protonation of guanosine and DNA and the formation of triple- and quadruple-strands of guanosine, its nucleotides, their polymers and DNA. b) Substitution of the 2'-position of deoxyribose by the most polar atom, fluorine: studies on 2'-deoxy-2'-fluoro-nucleosides, -nucleotides and their polymers, studied both by structural and biological methods. c) The effect of introducing the methyl group in the large groove of DNA: NMR studies of oligonucleotides containing N6-methylated adenine residues, and enzymatic and molecular biology work on Dam methylase are reported.