4XGT:
reference: Structure of the frequency-interacting RNA helicase: a protein interaction hub for the circadian clock., Conrad KS, Hurley JM, Widom J, Ringelberg CS, Loros JJ, Dunlap JC, Crane BR, EMBO J. 2016 Jun 23. pii: e201694327. PMID: 27340124

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