1DN8:
reference: Structure of a Z-DNA with two different backbone chain conformations. Stabilization of the decadeoxyoligonucleotide d(CGTACGTACG) by [Co(NH3)6]3+ binding to the guanine., Brennan RG, Westhof E, Sundaralingam M, J Biomol Struct Dyn 1986 Feb;3(4):649-65. PMID: 3271042

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