6J2W:
reference: Structure-guided post-SELEX optimization of an ochratoxin A aptamer., Xu G, Zhao J, Liu N, Yang M, Zhao Q, Li C, Liu M, Nucleic Acids Res. 2019 May 7. pii: 5486272. doi: 10.1093/nar/gkz336. PMID: 31062016

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