4RJD:
reference: Opposing orientations of the anti-psychotic drug trifluoperazine selected by alternate conformations of M144 in calmodulin., Feldkamp MD, Gakhar L, Pandey N, Shea MA, Proteins. 2015 May;83(5):989-96. doi: 10.1002/prot.24781. Epub 2015 Mar 25. PMID: 25694384

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