3UBI:
reference: The absence of tertiary interactions in a self-assembled DNA crystal structure., Nguyen N, Birktoft JJ, Sha R, Wang T, Zheng J, Constantinou PE, Ginell SL, Chen Y, Mao C, Seeman NC, J Mol Recognit. 2012 Apr;25(4):234-7. doi: 10.1002/jmr.2183. PMID: 22434713

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