The phosphoramidite monomer of the C-nucleoside 2'-aminoethoxy-2-amino-3-methylpyridine (AE-MAP) has been synthesized for the first time and incorporated into triplex-forming oligonucleotides (TFOs). Ultraviolet melting and DNase I footprinting studies show that AE-MAP is a potent triplex-stabilizing monomer that is selective for GC base pairs. TFOs containing AE-MAP bind with high affinity to duplexes but only weakly to single stranded DNA. In addition, AE-MAP confers high nuclease resistanc...Expand abstract
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2'-Aminoethoxy-2-amino-3-methylpyridine in triplex-forming oligonucleotides: high affinity, selectivity and resistance to enzymatic degradation.
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