3CGP:
reference: X-ray structures of U2 snRNA-branchpoint duplexes containing conserved pseudouridines., Lin Y, Kielkopf CL, Biochemistry. 2008 May 20;47(20):5503-14. Epub 2008 Apr 25. PMID: 18435545

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