4FNE:
reference: Evolution of minimal specificity and promiscuity in steroid hormone receptors., Eick GN, Colucci JK, Harms MJ, Ortlund EA, Thornton JW, PLoS Genet. 2012 Nov;8(11):e1003072. doi: 10.1371/journal.pgen.1003072. Epub 2012, Nov 15. PMID: 23166518

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