3GBI:
reference: From molecular to macroscopic via the rational design of a self-assembled 3D DNA crystal., Zheng J, Birktoft JJ, Chen Y, Wang T, Sha R, Constantinou PE, Ginell SL, Mao C, Seeman NC, Nature. 2009 Sep 3;461(7260):74-7. PMID: 19727196

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