3BTR:
reference: Structural basis for the nuclear import of the human androgen receptor., Cutress ML, Whitaker HC, Mills IG, Stewart M, Neal DE, J Cell Sci. 2008 Apr 1;121(Pt 7):957-68. Epub 2008 Mar 4. PMID: 18319300

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