2RS7:
reference: Solution structures of the double-stranded RNA-binding domains from RNA helicase A., Nagata T, Tsuda K, Kobayashi N, Shirouzu M, Kigawa T, Guntert P, Yokoyama S, Muto Y, Proteins. 2012 Jun;80(6):1699-706. doi: 10.1002/prot.24059. Epub 2012 Mar 27. PMID: 22454253

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