1TAN:
reference: The NMR structure of estrone (Es)-tethered tandem DNA duplex: [d(5'pCAGCp3')-Es] + [Es-d(5'pTCCA3')]: d(5'pTGGAGCTG3')., Denisov AY, Sandstrom A, Maltseva TV, Pyshnyi DV, Ivanova EM, Zarytova VF, Chattopadhyaya J, J Biomol Struct Dyn 1997 Dec;15(3):499-516. PMID: 9439997

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).