Abstract
A doubling of the length of binding site for the same size of ligand is achieved by the title compound by formation of a cooperative hairpin dimer on binding to DNA (depicted schematically below). The binding affinity and selectivity are unaffected by this new binding pattern. Circles represent heterocyclic rings, and diamonds and curved lines represent β-alanine and (R)-2,4-diaminobutyric acid residues, respectively.
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