5IYE:
reference: Comparison of X-ray crystal structures of a tetradecamer sequence d(CCCGGGTACCCGGG)2 at 1.7 A resolution., Karthik S, Thirugnanasambandam A, Mandal PK, Gautham N, Nucleosides Nucleotides Nucleic Acids. 2017 Apr 7:1-12. doi:, 10.1080/15257770.2017.1287378. PMID: 28387634

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