4CQO:
reference: Structural basis for the Nanos-mediated recruitment of the CCR4-NOT complex and translational repression., Bhandari D, Raisch T, Weichenrieder O, Jonas S, Izaurralde E, Genes Dev. 2014 Apr 15;28(8):888-901. doi: 10.1101/gad.237289.113. PMID: 24736845

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