5SVG:
reference: Kinetics of the LOV domain of ZEITLUPE determine its circadian function in Arabidopsis., Pudasaini A, Shim JS, Song YH, Shi H, Kiba T, Somers DE, Imaizumi T, Zoltowski BD, Elife. 2017 Feb 28;6. pii: e21646. doi: 10.7554/eLife.21646. PMID: 28244872

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