6BB8:
reference: Structure of frequency-interacting RNA helicase from Neurospora crassa reveals high flexibility in a domain critical for circadian rhythm and RNA surveillance., Morales Y, Olsen KJ, Bulcher JM, Johnson SJ, PLoS One. 2018 May 2;13(5):e0196642. doi: 10.1371/journal.pone.0196642., eCollection 2018. PMID: 29718972

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