1PQT:
reference: Refinement of d(GCGAAGC) hairpin structure using one- and two-bond residual dipolar couplings., Padrta P, Stefl R, Kralik L, Zidek L, Sklenar V, J Biomol NMR 2002 Sep;24(1):1-14. PMID: 12449414

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