3QLP:
reference: Thrombin-aptamer recognition: a revealed ambiguity., Russo Krauss I, Merlino A, Giancola C, Randazzo A, Mazzarella L, Sica F, Nucleic Acids Res. 2011 Sep 1;39(17):7858-67. Epub 2011 Jun 28. PMID: 21715374

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