4IT6:
reference: Noncanonical FK506-Binding Protein BDBT Binds DBT to Enhance Its Circadian Function and Forms Foci at Night., Fan JY, Agyekum B, Venkatesan A, Hall DR, Keightley A, Bjes ES, Bouyain S, Price JL, Neuron. 2013 Nov 20;80(4):984-96. doi: 10.1016/j.neuron.2013.08.004. Epub 2013, Nov 7. PMID: 24210908

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