1QDK:
reference: Determination of the number and location of the manganese binding sites of DNA quadruplexes in solution by EPR and NMR in the presence and absence of thrombin., Marathias VM, Wang KY, Kumar S, Pham TQ, Swaminathan S, Bolton PH, J Mol Biol 1996 Jul 19;260(3):378-94. PMID: 8757801

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