Abstract
An efficient synthesis of N-hydroxycarbamate containing thymidine dimer 9 was accomplished and it was incorporated into automatic DNA syntheses to make thymidine 16mers T*-1, T*-2 and T*-3. Binding abilities of T*-1, T*-2 and T*-3 with poly (dA)-16mer were assayed by melting denaturation (Tm) studies of the corresponding duplexes. Iron binding ability of a thymidine oligomer with N-hydroxycarbamate linkages was studied by MALDI-MS. Nuclease stability assays showed that the modified oligonucleotides have enhanced resistance toward nuclease S1 (endonuclease) compared to natural oligonucleotides.
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