2G1Z:
reference: Packing features of the all-AT oligonucleotide d(AAATTT)., Valls N, Santaolalla A, Campos JL, Subirana JA, J Biomol Struct Dyn. 2007 Jun;24(6):547-52. PMID: 17508776

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