4DWY:
reference: Interactions of Mn(2+) with a non-self-complementary Z-type DNA duplex., Mandal PK, Venkadesh S, Gautham N, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2012 Dec 1;68(Pt 12):1420-6., doi: 10.1107/S1744309112041759. Epub 2012 Nov 14. PMID: 23192018

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