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Peptide nucleic acid (PNA) is a synthetic analogue of DNA that commonly has an N‐aminoethyl glycine backbone. The crystal structures of two PNA duplexes, one containing eight standard nucleobase pairs (GGCATGCC)2, and the other containing the same nucleobase pairs and a central pair of bipyridine ligands, have been solved with a resolution of 1.22 and 1.10 Å, respectively. The non‐modified PNA duplex...
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