3ERD:
reference: The structural basis of estrogen receptor/coactivator recognition and the antagonism of this interaction by tamoxifen., Shiau AK, Barstad D, Loria PM, Cheng L, Kushner PJ, Agard DA, Greene GL, Cell 1998 Dec 23;95(7):927-37. PMID: 9875847

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