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Stability of stereoregular oligonucleotides towards selected nucleases, as well as the thermal stability of duplexes formed with DNA and RNa were investigated.Other strategies leading to antisense oligonucleotides try to avoid P-chirality by replacement of phosphates with achiral phosphorodithioates or moities like formacetal, sulphones, dietylsiloxanes etc.
W.J.Stec, Centre of Molecular and Macromolecular Studies, Dept. of Bioorganic Chemistry, Polish Academy of Sciences, Sienkiewicza St. 112, 90-363 Lodz, Poland