Abstract

To find the nuclease-resistant oligodeoxynucleotides (ODNs) with natural phosphodiester linkages, we designed and synthesized ODNs containing 4′-C-aminoalkylthymidines (1–4). We found that the ODNs containing 1, 2, 3 or 4 were more resistant to nucleolytic hydrolysis by both snake venom phosphodiesterase (a 3′-exonuclease) and DNase I (an endonuclease) than unmodified ODNs.

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