2WBR:
reference: The RRM domain in GW182 proteins contributes to miRNA-mediated gene silencing., Eulalio A, Tritschler F, Buttner R, Weichenrieder O, Izaurralde E, Truffault V, Nucleic Acids Res. 2009 Mar 18. PMID: 19295135

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