Abstract
A hairpin pyrrole polyamide conjugated to a Hoechst 33258 (Ht) analogue, PyPyPy-γ-PyPyPy-γ-Ht, was synthesized on solid-phase by adaptation of an Fmoc technique using a series of PyBOP/HOBt mediated coupling reactions. Sequence selectivity and complex stabilities were characterized by spectrofluorometric titrations and thermal melting studies. The polyamide of the conjugate was observed to bind in a hairpin motif forming 1:1 conjugate:dsDNA complexes. The conjugate is able to recognize nine contiguous A/T bps, discriminating from the sequences containing fewer than nine contiguous A/T bps.
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