3CDM:
reference: Topology conservation and loop flexibility in quadruplex-drug recognition: crystal structures of inter- and intramolecular telomeric DNA quadruplex-drug complexes., Parkinson GN, Cuenca F, Neidle S, J Mol Biol. 2008 Sep 19;381(5):1145-56. Epub 2008 Jun 17. PMID: 18619463

This OCA Structure page
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