4QIL:
reference: The ROQ domain of Roquin recognizes mRNA constitutive-decay element and double-stranded RNA., Tan D, Zhou M, Kiledjian M, Tong L, Nat Struct Mol Biol. 2014 Jul 13. doi: 10.1038/nsmb.2857. PMID: 25026078

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