Abstract

An oligodeoxyribonucleotide (ODN) containing three C5-substituted arabinofuranosyluracils was synthesized by the post-synthetic modification method from the ODN containing three C5-substituted 2,2'-anhydrouridines. The stability of the modified ODN/DNA duplex was lower than that of the corresponding normal duplex but that of the modified ODN/RNA duplex showed little change. The modified ODN could induce RNase H activity and was resistant against nuclease.

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