Abstract
This paper reports details of the synthesis of oligodeoxynucleotides containing the modified base 5-methyl-N4,N4-ethanocytosine (Ce). The 9-fluorenylmethoxycarbonyl group is used as a protecting group for the exocyclic amines of dA and dC. This group can be removed rapidly under very mild conditions. Oligomers containing the Ce base form a cross-link when hybridized to their complementary deoxyoligonucleotides. Some of the scope and limitations of these cross-link forming oligonucleotides are reported.
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