1JTV:
reference: Pseudo-symmetry of C19 steroids, alternative binding orientations, and multispecificity in human estrogenic 17beta-hydroxysteroid dehydrogenase., Gangloff A, Shi R, Nahoum V, Lin SX, FASEB J 2003 Feb;17(2):274-6. Epub 2002 Dec 17. PMID: 12490543

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